WO2021218146A1 - 光网络终端和确定光网络终端连接的端口的方法 - Google Patents

光网络终端和确定光网络终端连接的端口的方法 Download PDF

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WO2021218146A1
WO2021218146A1 PCT/CN2020/132535 CN2020132535W WO2021218146A1 WO 2021218146 A1 WO2021218146 A1 WO 2021218146A1 CN 2020132535 W CN2020132535 W CN 2020132535W WO 2021218146 A1 WO2021218146 A1 WO 2021218146A1
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wavelength
optical signal
optical
target
test
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PCT/CN2020/132535
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English (en)
French (fr)
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董振华
曾小飞
董小龙
金超
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华为技术有限公司
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Publication of WO2021218146A1 publication Critical patent/WO2021218146A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/42Coupling light guides with opto-electronic elements
    • G02B6/4201Packages, e.g. shape, construction, internal or external details
    • G02B6/4204Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4215Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795Performance monitoring; Measurement of transmission parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40Transceivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q11/0067Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0083Testing; Monitoring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/009Topology aspects

Definitions

  • This application relates to the field of optical fiber communication technology, and in particular to an optical network terminal and a method for determining a port connected to the optical network terminal.
  • PON Passive Optical Network
  • OLT optical line terminal
  • ODN optical Distribution Network
  • ONT optical network terminal
  • ODN optical Network Terminal
  • a reflection grating is set on each port of the ODN splitter.
  • different ports of the splitter are set to reflect optical signals of different wavelengths.
  • the wavelengths of the optical signals reflected by the reflective gratings set at each port of the two optical splitters are ⁇ 1- ⁇ n, and n is each of the i-th optical splitters.
  • the number of ports of a splitter is connected to the ONT. The external device is used to detect the power of the received test optical signal.
  • the test optical signal of multiple wavelengths can be input to the ODN.
  • the multiple wavelengths are determined by each of the ODNs.
  • the external equipment of a certain ONT receives the minimum power of the test optical signal of a certain wavelength, it means that the test optical signal of this wavelength is reflected by the reflection grating, and it can be determined that the port where the reflection grating corresponding to this wavelength is located is that the ONT is in the ODN.
  • the embodiments of the present application provide an optical network terminal and a method for determining the port connected to the optical network terminal.
  • the application of the present application can reduce the implementation difficulty of the ONT and efficiently determine the port that the ONT is connected to in the ODN.
  • an ONT in a first aspect, includes an optical fiber interface, an optical receiving component, an optical transmitting component, a first filter, and a second filter.
  • a first filter is arranged between the optical fiber interface and the light emitting component, and the light emitting component is located on the transmission light path of the first filter, and the first filter is used to transmit the upstream optical signal emitted by the light emitting component to the optical fiber interface;
  • the receiving component cooperates with the first filter and the second filter to receive the test optical signal and the service optical signal, and the wavelength of the test optical signal is different from the wavelength of the service optical signal.
  • the test optical signal is used to determine the port to which the ONT is connected in the ODN and the level of the optical splitter to which the port to which the ONT is connected in the ODN belongs. In this way, one ONT can realize the reception of test optical signals and service optical signals.
  • the optical receiving component and the second filter are located on the reflection light path of the first filter; the first filter is also used to reflect the test optical signal and service optical signal received by the optical fiber interface to the second Two filters; the second filter is used to transmit the test optical signal and the service optical signal to the light receiving component.
  • the light receiving component and the second filter are located on the reflection light path of the first filter.
  • the first filter is not only used to transmit the upstream optical signal sent by the optical transmitter component to the optical fiber interface, but also can be used to reflect the test optical signal and the downstream business optical signal received by the optical fiber interface to the second filter.
  • the second filter can be used to transmit the test optical signal and the downstream service optical signal to the light receiving component. In this way, the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • the light receiving component includes a first light receiving component and a second light receiving component; the second filter is located on the transmission light path of the first filter, and is located between the first filter and the light emitting component
  • the first light receiving component is located on the reflection light path of the first filter; the second light receiving component is located on the reflection light path of the second filter; the first filter is also used to reflect the test light signal received by the optical fiber interface to
  • the first optical receiving component transmits the service optical signal received by the optical fiber interface to the second filter;
  • the second filter is used to reflect the service optical signal received by the optical fiber interface to the second optical receiving component, and the second filter also It is used to transmit the upward light signal emitted by the light emitting component to the first filter.
  • one ONT includes two optical receiving components, which are respectively used to receive downlink service optical signals and test optical signals. Therefore, one ONT can realize the reception of test optical signals and downlink service optical signals, reducing the difficulty of ONT implementation.
  • the light receiving component includes a first light receiving component and a second light receiving component; the second filter is located on the transmission light path of the first filter, and is located between the first filter and the light emitting component
  • the second light receiving component is located on the reflection light path of the first filter; the first light receiving component is located on the reflection light path of the second filter; the first filter is also used to reflect the service light signal received by the optical fiber interface to
  • the second light receiving component transmits the test light signal received by the optical fiber interface to the second filter; the second filter is used to reflect the test light signal received by the optical fiber interface to the first light receiving component, and the second filter also It is used to transmit the upward light signal emitted by the light emitting component to the first filter.
  • one ONT includes two optical receiving components, which are respectively used to receive downlink service optical signals and test optical signals. Therefore, one ONT can realize the reception of test optical signals and downlink service optical signals, reducing the difficulty of ONT implementation.
  • the ONT further includes a processor, which is electrically connected to the optical receiving component; the processor is used to determine the total power of each of the received test optical signal and service optical signal and the power of the service optical signal Determine the first wavelength of the test optical signal received when the first difference is less than the first value, and determine that the port of the ODN connected to the ONT is the port corresponding to the first wavelength; or, the processor is used to determine the maximum total The second difference between the power and the total power of each of the received test optical signals and service optical signals, and determine the first wavelength of the received test optical signal when the second difference is greater than the second value; determine the ODN connected to the ONT The port is the port corresponding to the first wavelength, and the maximum total power is the maximum value among the multiple total powers of the received test optical signal and service optical signal.
  • the ONT further includes a processor, and the processor is electrically connected to the optical receiving component.
  • each port of the optical splitter in the ODN is provided with a reflection grating, and the wavelength of the optical signal that can be reflected by the reflection grating provided for each port is different.
  • Input test optical signals of multiple wavelengths for the ODN are composed of the wavelengths of the optical signals that can be reflected by the reflection grating set at each port of the ODN optical splitter.
  • the optical receiving component of the ONT can detect the total power of the test optical signal and service optical signal received each time.
  • the processor may obtain the power of the service optical signal stored in advance, and the power may be the power detected by the optical receiving component when no test optical signal is input to the ODN.
  • the processor may take the difference between each total power and the power of the service optical signal to obtain the first difference corresponding to each total power. Then the processor can determine the size of the first difference corresponding to each total power and the first value. If for a certain total power, the first difference corresponding to the total power is less than the first value, it can determine to which total power the total power belongs.
  • the first wavelength of the received test optical signal The processor sets the port that the ONT is connected to in the ODN as the port corresponding to the first wavelength.
  • the optical receiving component of the ONT can detect the total power of the test optical signal and the service optical signal received each time.
  • the processor can determine the maximum value of the multiple detected total powers (ie, the maximum total power), and then calculate the second difference between the maximum value and each detected total power to obtain the second difference corresponding to each total power .
  • the processor can determine the magnitude of the second difference and the second value corresponding to each total power. When the processor determines that the second difference corresponding to the total power is greater than the second value, the first wavelength of the received test optical signal. In this way, the port to which the ONT is connected in the ODN can be determined.
  • the processor is further configured to determine a third difference between the first total power and the second total power.
  • the first total power and the second total power are the test optical signals received by the optical receiving component.
  • the optical signal includes the optical signal of the shifted wavelength and does not include the test optical signal of the target wavelength;
  • the shifted wavelength is the wavelength obtained by shifting the target wavelength from the target value, and the test optical signal of the target wavelength is at the target wavelength of the first-stage optical splitter of the ODN
  • the reflected power of the corresponding port is greater than or equal to the threshold that produces the Brillouin amplification effect, and the test optical signal of the target wavelength is reflected at the port corresponding to the target wavelength of the second-stage optical splitter of the ODN, and the power is less than
  • the threshold of the amplification effect when the first wavelength includes multiple wavelengths, the target wavelength is one of the first wavelengths; if the third difference is greater than or equal to the target threshold, it is determined that the port corresponding to the target wavelength belongs to the first wavelength of the ODN.
  • the processor may also obtain the power detected by the optical receiving component when the received test optical signal includes an optical signal with an offset wavelength, that is, the first total power and the second total power.
  • the test optical signal received by the optical receiving component includes the optical signal of the offset wavelength when the test optical signal of the target wavelength and the optical signal of the offset wavelength are input to the ODN together
  • the optical signal of the offset wavelength included in the test optical signal received by the optical receiving component is the optical signal when the test optical signal of the target wavelength is not input to the ODN.
  • the test optical signal of the target wavelength will amplify the optical signal of the offset wavelength at the first port of the first-stage optical splitter of the ODN, instead of the offset wavelength at the second port of the second-stage optical splitter of the ODN
  • the optical signal of the target wavelength is subjected to amplification processing, and the reflection gratings set at the first port and the second port perform reflection processing on the test optical signal of the target wavelength.
  • the target wavelength is one of the first wavelengths.
  • the processor may determine a third difference between the first total power and the second total power, and determine the magnitude of the third difference and the target threshold.
  • the third difference is greater than or equal to the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN, and it can be determined that the port corresponding to a wavelength other than the target wavelength in the first wavelength belongs to the second ODN Grade splitter. If the third difference is less than the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and it can be determined that the ports corresponding to the wavelengths other than the target wavelength in the first wavelength belong to the first-stage optical splitter of the ODN Device. In this way, the level of the optical splitter to which the port connected by the ONT in the ODN belongs can be accurately determined.
  • the ONT further includes a processor that is electrically connected to the first optical receiving component; the processor is used to determine the maximum power and the power of each test optical signal received by the first optical receiving component.
  • the fourth difference is the first wavelength of the test optical signal received by the first optical receiving component when it is determined that the fourth difference is greater than the second value, and the port of the ODN connected to the ONT is determined to be the port corresponding to the first wavelength, and the maximum power is The maximum value among multiple powers of the received test optical signal.
  • the ONT further includes a processor, which is electrically connected to the optical receiving component, and of course, the processor is electrically connected to the first optical receiving component.
  • a processor which is electrically connected to the optical receiving component, and of course, the processor is electrically connected to the first optical receiving component.
  • each port of the optical splitter in the ODN is provided with a reflection grating, and the reflection grating corresponding to each port is not the same wavelength (that is, the optical signal that each reflection grating can reflect) The wavelength is not the same).
  • Input test optical signals of multiple wavelengths for the ODN The multiple wavelengths are composed of the wavelengths corresponding to the reflection gratings set at each port of the ODN optical splitter.
  • the first optical receiving component of the ONT can detect the power of the test optical signal received each time.
  • the processor may determine the maximum value among the multiple powers of the test optical signal received by the first optical receiving component, and then calculate the fourth difference between the maximum power and each power of the test optical signal received by the first optical receiving component.
  • the processor determines the magnitude of the fourth difference corresponding to each power and the second value, and when the fourth difference corresponding to a certain power is greater than the second value, determines the test light received by the first optical receiving component corresponding to the power The first wavelength of the signal.
  • the processor may determine that the port connected by the ONT in the ODN is the port corresponding to the first wavelength.
  • the port corresponding to the first wavelength is the port provided with the reflection grating that reflects the test optical signal of the first wavelength in the ODN. In this way, the port to which the ONT is connected in the ODN can be determined.
  • the light emitting component is located on the reflection light path of the first filter.
  • the light receiving component and the second filter are located on the transmission light path of the first filter.
  • the first filter is not only used to reflect the upstream optical signal sent by the optical transmitting component to the optical fiber interface, but also can be used to transmit the test optical signal and service optical signal received by the optical fiber interface to the second filter.
  • the second filter can be used to transmit the test optical signal and the service optical signal to the light receiving component.
  • the optical receiving component can receive the test optical signal and the service optical signal.
  • the optical receiving component can detect the total power of the received test optical signal and service optical signal.
  • the service optical signal is a downlink service optical signal. In this way, the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • the light receiving component includes a first light receiving component and a second light receiving component
  • the second filter is located on the transmission light path of the first filter, and is located between the first filter and the second light receiving component.
  • the first light receiving component is located on the reflective light path of the second filter
  • the light emitting component is located on the reflective light path of the first filter.
  • the first filter is used to transmit the uplink optical signal emitted by the optical transmitting component to the optical fiber interface through reflection, so as to realize the normal uplink service of the ONT.
  • the first filter is also used to transmit the test optical signals and service optical signals received by the optical fiber interface to the second filter.
  • the second filter is used to transmit the service light signal received by the optical fiber interface to the second light receiving component.
  • the second filter is also used to reflect the test light signal received by the optical fiber interface to the first light receiving component.
  • the second optical receiving component can receive the service optical signal and perform normal downlink services
  • the first optical receiving component can receive the test optical signal and detect the power of the received test optical signal.
  • the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • the light receiving component includes a first light receiving component and a second light receiving component
  • the second filter is located on the transmission light path of the first filter, and is located between the first filter and the first light receiving component.
  • the second light receiving component is located on the reflective light path of the second filter
  • the light emitting component is located on the reflective light path of the first filter.
  • the first filter is used to transmit the uplink optical signal emitted by the optical transmitting component to the optical fiber interface through reflection, so as to realize the normal uplink service of the ONT.
  • the first filter is also used to transmit the test optical signals and service optical signals received by the optical fiber interface to the second filter.
  • the second filter is used to reflect the service optical signal received by the optical fiber interface to the second optical receiving component.
  • the second filter is also used to transmit the test light signal received by the optical fiber interface to the first light receiving component.
  • the second optical receiving component can receive the service optical signal and perform normal downlink services
  • the first optical receiving component can receive the test optical signal and detect the power of the received test optical signal.
  • the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • the light receiving component includes a first light receiving component and a second light receiving component
  • the second filter is located on the transmission light path of the first filter, and is located between the first filter and the first light receiving component.
  • the second light receiving component is located on the reflective light path of the first filter
  • the light emitting component is located on the reflective light path of the second filter.
  • the second filter is used to reflect the upstream optical signal emitted by the optical transmitter component to the first filter
  • the first filter is used to transmit the upstream optical signal emitted by the optical transmitter component to the optical fiber interface to realize normal upstream services of the ONT.
  • the first filter is also used to reflect the service optical signal received by the optical fiber interface to the second light receiving component, and the first filter is also used to transmit the test optical signal received by the optical fiber interface to the second filter.
  • the second filter is also used to transmit the test light signal received by the optical fiber interface to the first light receiving component.
  • the second optical receiving component can receive the service optical signal and perform normal downlink services
  • the first optical receiving component can receive the test optical signal and detect the power of the received test optical signal.
  • the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • the light receiving component includes a first light receiving component and a second light receiving component
  • the second filter is located on the transmission light path of the first filter, and is located between the first filter and the second light receiving component.
  • the first light receiving component is located on the reflective light path of the first filter
  • the light emitting component is located on the reflective light path of the second filter.
  • the second filter is used to reflect the upstream optical signal emitted by the optical transmitting component to the first filter
  • the first filter is used to transmit the upstream optical signal emitted by the optical transmitting component to the optical fiber interface to realize the normal upstream service of the ONT.
  • the first filter is also used to reflect the test optical signal received by the optical fiber interface to the first light receiving component, and the first filter is also used to transmit the service optical signal received by the optical fiber interface to the second filter.
  • the second filter is also used to transmit the service light signal received by the optical fiber interface to the second light receiving component.
  • the second optical receiving component can receive the service optical signal and perform normal downlink services
  • the first optical receiving component can receive the test optical signal and detect the power of the received test optical signal.
  • the test optical signal and the service optical signal can be received through one ONT, which reduces the difficulty of implementing the ONT.
  • a tunable wavelength laser in a second aspect, includes a laser, a beam splitter, a first optical modulator, and an optical combiner.
  • the beam splitter includes a first light exit port and a second light exit port; the laser is used for Output test optical signals of multiple wavelengths; the beam splitter is located between the laser and the first optical modulator, and the beam splitter is located at the light exit of the laser, and the first optical modulator is located at the first light exit of the beam splitter;
  • the device is used to divide the test optical signal of the target wavelength entering the beam splitter into a first test optical signal and a second test optical signal, which are output through the first optical outlet and the second optical outlet respectively, where the target wavelength belongs to multiple wavelengths;
  • the light combiner is located at the light exit port of the first light modulator and the second light exit port of the beam splitter; the first light modulator is used to shift the wavelength of the first test optical signal by the target value to obtain the shifted wavelength optical signal, and combine
  • the optical device is used
  • the second test optical signal is generated after being reflected at the first port of the first-stage optical splitter of the ODN. Threshold of Brillouin amplification effect, the power of the second test optical signal after being reflected at the second port of the second-stage optical splitter of ODN is less than the threshold for Brillouin amplification effect, the central wavelength of the reflection grating set at the first port Is the target wavelength, and the center wavelength of the reflection grating set at the second port is the target wavelength.
  • two optical signals can be generated by the tunable wavelength laser, one optical signal is the second test optical signal, and the other optical signal is the offset wavelength optical signal obtained by shifting the wavelength of the second test optical signal.
  • the tunable wavelength laser further includes a second optical modulator; the second optical modulator is located between the second light outlet of the beam splitter and the light combiner; the second optical modulator is used to adjust the entrance The power of the second test optical signal of the second optical modulator. In this way, the power of the second test optical signal can be flexibly controlled.
  • a system for determining the topology of an optical access network includes a tunable wavelength laser, an ONT, and a wavelength division multiplexer or coupler.
  • the tunable wavelength laser is the optional Wavelength-modulated laser;
  • ONT is the ONT in the first aspect;
  • wavelength division multiplexer or coupler is used to combine service optical signals and test optical signals into one optical signal. In this way, the topology of the optical access network can be determined efficiently.
  • the system also includes ODN; ODN is connected to a wavelength division multiplexer or coupler, and ODN is connected to an ONT; ODN includes a first-stage optical splitter and a second-stage optical splitter, the first-stage optical splitter Each port of the optical splitter and the second-stage optical splitter is provided with a reflection grating, and the wavelength of the optical signal that can be reflected by the reflection grating is different from the wavelength of the service optical signal. In this way, it is possible to determine the topology of the optical access network by setting the reflection grating at the port of the optical splitter of the ODN, and improve the efficiency of determining the topology of the optical access network.
  • each port of the first-stage optical splitter and each port of the second-stage optical splitter are provided with reflection gratings of the same wavelength; for the first-stage optical splitter and the second-stage optical splitter
  • each port of the splitter adopts reflective gratings of different wavelengths. In this way, since the port of each optical splitter is provided with a reflection grating of the same wavelength, the number of wavelengths of the test optical signal can be reduced, and the wavelength adjustment range of the tunable wavelength laser can be reduced.
  • the tunable wavelength laser is arranged in the OLT.
  • a method for outputting a test optical signal which is applied to the tunable wavelength laser of the second aspect; the method includes: outputting a test optical signal of a target wavelength, wherein the target wavelength belongs to the tunable wavelength laser that can output Multiple test optical signal wavelengths; divide the test optical signal of the target wavelength into two optical signals, where the two optical signals include the first test optical signal and the second test optical signal; perform wavelength shift on the first test optical signal Shift processing to obtain the optical signal of the shifted wavelength; combine the second test optical signal and the optical signal of the shifted wavelength to output the synthesized optical signal, where the second test optical signal is at the target wavelength of the first-stage optical splitter of the ODN
  • the reflected power of the corresponding port is greater than or equal to the threshold of the Brillouin amplification effect, and the second test optical signal at the port corresponding to the target wavelength of the second-stage optical splitter of the ODN is less than the Brillouin amplification.
  • the threshold of the effect is greater than or equal to the threshold of
  • the tunable wavelength laser can output the test optical signal of the target wavelength, and the tunable wavelength laser can divide the test optical signal of the target wavelength into two optical signals, and the two optical signals may include the first test light. Signal and the second test optical signal.
  • the wavelengths of the first test optical signal and the second test optical signal are both target wavelengths.
  • the tunable wavelength laser can shift the target wavelength of the first test optical signal by a target value to obtain an optical signal with a shifted wavelength.
  • the tunable wavelength laser can output the second test optical signal and/or the optical signal with the offset wavelength, that is, output to the ODN.
  • the power of the second test optical signal after being reflected at the port corresponding to the target wavelength of the first-stage optical splitter of ODN is greater than or equal to the threshold of the Brillouin amplification effect, and the second test optical signal is at the second-stage optical splitter of ODN.
  • the reflected power of the port corresponding to the target wavelength is less than the threshold of the Brillouin amplification effect. That is, the second test optical signal is used to amplify the optical signal of the offset wavelength at the port corresponding to the target wavelength of the first-stage optical splitter of the ODN, and is used for the optical splitter except the first optical splitter in the ODN.
  • the port corresponding to the target wavelength does not amplify the optical signal with the offset wavelength.
  • the power of the test optical signal detected by the ONT is the power of the optical signal of the offset wavelength after amplification processing, and the detected power is relatively large . If the port connected to the ONT is the port corresponding to the target wavelength of the second-stage optical splitter, the power of the test optical signal detected by the ONT is the power of the optical signal with the offset wavelength after being not amplified, and the detected power is relatively small , So it can be used to distinguish the level of the optical splitter to which the port connected by the ONT in the ODN belongs.
  • the method further includes: adjusting the power of the second test optical signal; synthesizing the second test optical signal and the optical signal of the offset wavelength, including: synthesizing the optical signal of the offset wavelength and adjusting The second test optical signal after power. In this way, the power of the second test optical signal can be flexibly adjusted.
  • the target wavelength is the wavelength corresponding to the port connected by the target optical network terminal ONT in the optical distribution network ODN; the test optical signal of the target wavelength is used to test the optical splitter to which the port connected by the target ONT in the ODN belongs
  • the target wavelength is one of the wavelengths corresponding to the port that the target ONT is connected to in the ODN; before synthesizing the second test optical signal and the optical signal of the offset wavelength, it also includes: receiving a wavelength output command sent by the OLT, where , The wavelength output instruction is used to instruct the output of the test optical signal of the target wavelength; the method further includes receiving the shutdown instruction of the second test optical signal sent by the OLT; stopping the output of the second test optical signal, and outputting the optical signal of the shifted wavelength .
  • the current OLT knows that the wavelength corresponding to a port connected to the ODN of the target ONT (any ONT) is the target wavelength.
  • the OLT can send a wavelength output command to the tunable wavelength laser.
  • the tunable wavelength laser can output the test optical signal of the target wavelength, and the tunable wavelength laser can combine the second test optical signal and the optical signal of the offset wavelength into a beam of optical signals, and output the beam of optical signals.
  • the tunable wavelength laser can also receive a shutdown instruction of the second test optical signal sent by the OLT.
  • the tunable wavelength laser can turn off the output of the second test optical signal, and only output the optical signal with the offset wavelength to the ODN.
  • the test optical signal can be flexibly output, and data can be provided for identifying the level of the optical splitter to which the port to which the ONT is connected in the ODN belongs.
  • the test optical signal of the target wavelength before outputting the test optical signal of the target wavelength, it further includes: receiving the shutdown instruction of the optical signal of the offset wavelength sent by the OLT and the instruction of issuing a variety of test optical signals to turn off the optical signal of the offset wavelength.
  • the signal output is to output various test optical signals according to the preset wavelength sequence of the test optical signals, and the various test optical signals are used to determine the port that the target ONT is connected to in the ODN.
  • the OLT can send an instruction to turn off the optical signal with a shifted wavelength to the tunable wavelength laser, and to issue a variety of instructions to test the optical signal.
  • the tunable wavelength laser can receive these two commands, and then turn off the output of the optical signal with the offset wavelength.
  • the tunable wavelength laser can send out a variety of test optical signals according to a preset wavelength sequence (it can be issued to the tunable wavelength laser through an instruction by the OLT, or pre-configured in the tunable wavelength laser). In this way, the tunable wavelength laser can only output the second test optical signal in each beam of test optical signals.
  • the optical receiving component of the ONT detects the total power of the second test optical signal and the service optical signal. In this way, data can be provided for determining which port the ONT is connected to in the ODN.
  • a method for determining a port connected to an optical network terminal is provided, which is applied to the ONT of the first aspect or the system of the third aspect.
  • the method includes: obtaining the difference between the first power and the second power corresponding to the target ONT
  • the wavelength corresponding to the port connected by the target ONT in the optical distribution network ODN is the first wavelength, and a wavelength included in the first wavelength is the target wavelength;
  • the offset wavelength is the wavelength obtained by shifting the target wavelength from the target value, the first
  • the power and the second power are the power when the optical signal received by the target ONT includes the optical signal with the offset wavelength; when corresponding to the first power, the optical signal input to the optical distribution network ODN together with the optical signal with the offset wavelength includes the target wavelength
  • the optical signal input to the ODN includes the optical signal of the offset wavelength and does not include the test optical signal of the target wavelength.
  • the test optical signal of the target wavelength is in the first-stage optical splitter of the ODN
  • the reflected power of the port corresponding to the target wavelength is greater than or equal to the threshold that produces the Brillouin amplification effect, and the test optical signal of the target wavelength is reflected at the port corresponding to the target wavelength of the second-stage optical splitter of the ODN.
  • Threshold for the Amplification effect if the difference is greater than or equal to the target threshold, it is determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN; if the difference is less than the target threshold, it is determined that the port corresponding to the target wavelength belongs to the ODN
  • the second-stage optical splitter if the difference is greater than or equal to the target threshold, it is determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN.
  • the target ONT can obtain the first power and the second power.
  • the optical signal input from the tunable wavelength laser to the ODN is the test optical signal and offset of the target wavelength. Wavelength of optical signal.
  • the optical signal input to the ODN includes the test optical signal of the target wavelength and the optical signal of the shifted wavelength.
  • the optical signal input from the tunable wavelength laser to the ODN is an optical signal with a shifted wavelength. In this way, the optical signal input to the ODN is an optical signal with a shifted wavelength.
  • the target ONT may determine the difference between the first power and the second power.
  • the target ONT can determine the magnitude of the difference between the first power and the second power and the target threshold. If the difference between the first power and the second power is greater than or equal to the target threshold, the target ONT can determine that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN, and can determine the other wavelength in the first wavelength other than the target wavelength The port corresponding to the wavelength belongs to the second-stage optical splitter of the ODN. If the difference is less than the target threshold, the target ONT can determine that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and can determine that the port corresponding to another wavelength in the first wavelength other than the target wavelength belongs to the first-stage ODN Splitter.
  • the port of the target wavelength belongs to the first-stage optical splitter. Since the difference between the first power and the second power is relatively small, it indicates that the intensity of the optical signal of the offset wavelength received by the target ONT is relatively low, and it indicates that the test optical signal of the target wavelength does not amplify the optical signal of the offset wavelength. It can be determined that the port of the target wavelength belongs to the second-stage optical splitter.
  • the method further includes: obtaining a third power when the optical signal received by the target ONT includes a test optical signal of one wavelength, and the one wavelength is any one of multiple wavelengths, Multiple wavelengths are the wavelengths corresponding to the different ports of each optical splitter of the ODN; determine the difference between the third power corresponding to each wavelength and the power of the service optical signal; if the third power corresponding to the first wavelength is the same as the service optical signal If the difference in power is less than the first value, it is determined that the port connected to the target ONT in the ODN is the port corresponding to the first wavelength.
  • the target ONT can obtain the third power when the optical signal received by the target ONT includes a test optical signal of one wavelength.
  • the one wavelength is any one of multiple wavelengths, and the multiple wavelengths are wavelengths corresponding to different ports of each optical splitter of the ODN.
  • the target ONT may calculate the difference between the third power corresponding to each wavelength and the power of the service optical signal. Determine the difference between the third power corresponding to each wavelength and the power of the service optical signal and the first value. If the difference between the third power corresponding to the first wavelength and the power of the service optical signal is less than the first value, then It can be determined that the port to which the target ONT is connected in the ODN is the port corresponding to the first wavelength. In this way, the port to which the ONT is connected in the ODN can be determined.
  • a device for determining a port connected to an optical network terminal includes a plurality of modules that execute instructions to implement the method for determining a port connected to an optical network terminal provided in the fifth aspect. .
  • a port identification device in a seventh aspect, includes a processor and a memory, wherein:
  • Computer instructions are stored in the memory; the processor executes the computer instructions to implement the method described in the fifth aspect.
  • a computer-readable storage medium stores computer instructions.
  • the port identification device executes the method described in the fifth aspect.
  • the present application provides a computer program product, the computer program product comprising computer instructions, and when the computer instructions are executed by a port recognition device, the port recognition device executes the method described in the fifth aspect.
  • Fig. 1 is a schematic diagram of an optical network terminal provided by an exemplary embodiment of the present application
  • FIG. 2 is a schematic diagram of transmission of a service optical signal and a test optical signal provided by an exemplary embodiment of the present application;
  • Fig. 3 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • Fig. 5 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • FIG. 11 is a schematic diagram of the power of an optical signal received by an optical network terminal according to an exemplary embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of an optical network terminal provided by an exemplary embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of a tunable wavelength laser provided by an exemplary embodiment of the present application.
  • Fig. 14 is a schematic structural diagram of a tunable wavelength laser provided by an exemplary embodiment of the present application.
  • FIG. 15 is a schematic diagram of a flow of outputting a test optical signal according to an exemplary embodiment of the present application.
  • FIG. 16 is a schematic diagram of a system for determining the topology of an optical access network provided by an exemplary embodiment of the present application.
  • FIG. 17 is a schematic diagram of an optical distribution network provided by an exemplary embodiment of the present application.
  • FIG. 18 is a schematic flowchart of determining a port connected to an optical distribution network of an optical network terminal according to an exemplary embodiment of the present application
  • FIG. 19 is a schematic diagram of amplifying an optical signal with an offset wavelength according to an exemplary embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a deterministic port identification device provided by an exemplary embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of an apparatus for determining a port connected to an optical network terminal according to an exemplary embodiment of the present application.
  • Optical fiber interface 1 Optical fiber interface 1;
  • the second optical modulator 50 ONT100;
  • Tunable wavelength laser 200 wavelength division multiplexer 300
  • Coupler 400, ODN500
  • Stimulated Brillouin amplification effect ie stimulated Brillouin scattering (SBS): Stimulated Brillouin scattering originates from the interaction between the laser electric field and the acoustic wave field in molecules or solids, that is, photons and The interaction of phonons is also called phonon scattering. Stimulated Brillouin scattering refers to a nonlinear optical effect in which a strong incident laser field induces a strong acoustic wave field in the medium and is scattered by it.
  • SBS stimulated Brillouin scattering
  • the production process of stimulated Brillouin scattering is: under the action of the electric field of the laser, through the electrostriction effect, the medium undergoes periodic density and dielectric constant changes, and the acoustic wave field is induced, which leads to a gap between the incident laser and the acoustic wave field. A coherent scattering process occurs.
  • the electrostrictive effect of the light wave field starts to work, which greatly enhances the acoustic vibrations (phonons) in certain states in the medium, and the enhanced acoustic wave field in turn enhances the incident
  • the scattering effect of the laser, the acoustic wave field, the laser wave field, and the scattered light wave field of the laser simultaneously exist in the medium and are mutually coupled.
  • the enhancement effect of the acoustic wave field and the scattered light wave field in the medium is made to compensate for their respective loss effects, and the stimulated amplification or oscillation effect of the induced acoustic wave field and the Brillouin scattered light wave field (ie stimulated distribution) Liyuan amplification effect).
  • scattered light has the characteristics of stimulated emission such as small divergence angle and narrow line width, it is called stimulated Brillouin scattering. It should be noted here that the stimulated Brillouin amplification effect only occurs between two optical signals with opposite transmission directions.
  • the reflective grating is a grating used to reflect the optical signal incident on the reflective grating, and each reflective grating reflects an optical signal of one wavelength.
  • an ONT in the embodiment of the present application, is provided.
  • the ONT includes an optical fiber interface 1, a light receiving component 2, a light emitting component 3, a first filter 4, and a second filter 5.
  • the first filter 4 may be 45 Degree filter.
  • a first filter 4 is arranged between the optical fiber interface 1 and the light emitting component 3, and the light emitting component 3 is located on the transmission light path of the first filter 4.
  • the optical transmitting component 3 is used to send an upstream optical signal when the ONT sends data upstream.
  • the first filter 4 is used to transmit the upstream optical signal emitted by the light emitting component 3 to the optical fiber interface 1.
  • the optical receiving component 2 can cooperate with the first filter 4 and the second filter 5 to receive the test optical signal and the service optical signal (that is, the downstream service optical signal in the direction from the OLT to the ONT.
  • the service optical signal mentioned later The signals are all downlink service optical signals), and the wavelength of the test optical signal is different from the wavelength of the service optical signal.
  • the test optical signal is used to determine the port to which the ONT is connected in the ODN and the level of the optical splitter to which the port to which the ONT is connected in the ODN belongs. In this way, one ONT can realize the reception of test optical signals and downlink service optical signals.
  • the light receiving component 2 and the second filter 5 are located on the reflection light path of the first filter 4.
  • the first filter 4 is not only used to transmit the upstream optical signal sent by the optical transmitting component 3 to the optical fiber interface 1, but also can be used to reflect the test optical signal and service optical signal received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 can be used to transmit the test optical signal and the service optical signal to the light receiving component 2.
  • the optical receiving component 2 can receive the test optical signal and the service optical signal.
  • the optical receiving component 2 can detect the total power of the received test optical signal and service optical signal.
  • the service optical signal is a downlink service optical signal. In this way, one ONT can realize the reception of test optical signals and service optical signals.
  • Fig. 1 only shows the case where the first filter 4 is one filter.
  • the first filter 4 may be a tilted wave plate, for example, the first filter 4 is a 45-degree tilted wave plate.
  • the first filter 4 may include a plurality of filters that cooperate with each other to reflect the test optical signal and the service optical signal to the second filter 5, and the plurality of filters cooperate with each other to make the light receiving assembly 2
  • the direction of the pins is appropriate, thereby minimizing the size of the ONT.
  • the first filter 4 includes two filters (filter A and filter B), and both filters are 45 degree filters, and filter A reflects the test optical signal and the service optical signal to a vertical horizontal plane. Downward, the filter B reflects the test optical signal and the service optical signal reflected by the filter A to the horizontal leftward direction, then the light receiving component 2 is located on the left side in FIG. 1.
  • the second filter 5 includes a first surface and a second surface
  • the first surface is the surface where the test light signal and the service light signal are incident on the second filter 5 for the first time.
  • the second surface is the back surface of the second filter sheet 5 opposite to the first surface.
  • the coating on the first side can transmit service optical signals, test optical signals and intermediate optical signals
  • the coating on the second side can transmit test optical signals and service optical signals, while blocking the intermediate optical signals, which are service optical signals.
  • An optical signal at a wavelength between the wavelength of the signal and the wavelength of the test optical signal.
  • the second filter 5 may be a band-pass filter, a common one is a Fabry-Perot type filter, and the specific structure is: coated on a glass substrate A translucent metal layer, followed by a layer of magnesium oxide, and then a translucent metal layer.
  • the two metal layers constitute two parallel plates of the Fabry-Perot filter.
  • a Fabry-Perot type filter is used to leave the transmission window for the service optical signal. If you want to increase the window for testing the optical signal, you can change the metal layer coating on the glass substrate to cover the service optical signal. And the wavelength of the test optical signal. Then, a stop band (that is, the aforementioned intermediate optical signal) is added between the service optical signal and the test optical signal by coating to realize the isolation between the wavelength of the service optical signal and the wavelength of the test optical signal.
  • the wavelength range of the original service optical signal is ⁇ 1- ⁇ 2.
  • the wavelength range covering the service optical signal and the test optical signal is ⁇ 1- ⁇ 3 ( ⁇ 2 ⁇ 3 )
  • the wavelength range of the intermediate optical signal is ⁇ 2- ⁇ 4, excluding ⁇ 2.
  • Figure 2 shows that the wavelength of the test optical signal is greater than the wavelength of the service optical signal.
  • the wavelength of the test optical signal may be smaller than the wavelength of the service optical signal.
  • the second filter 5 may include two filters, and the filter to which the service optical signal is first incident may transmit the service optical signal, the test optical signal, and the intermediate optical signal.
  • the later incident filter can transmit the test optical signal and the service optical signal, but block the intermediate optical signal.
  • the intermediate optical signal is an optical signal of a wavelength between the wavelength of the service optical signal and the wavelength of the test optical signal.
  • the light emitting component 3 is located on the reflection light path of the first filter 4.
  • the light receiving component 2 and the second filter 5 are located on the transmission light path of the first filter 4.
  • the first filter 4 is not only used to reflect the upstream optical signal sent by the optical transmitting component 3 to the optical fiber interface 1, but also can be used to transmit the test optical signal and service optical signal received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 can be used to transmit the test optical signal and the service optical signal to the light receiving component 2.
  • the optical receiving component 2 can receive the test optical signal and the service optical signal.
  • the optical receiving component 2 can detect the total power of the received test optical signal and service optical signal.
  • the service optical signal is a downlink service optical signal. In this way, one ONT can realize the reception of test optical signals and service optical signals.
  • the first filter 4 and the second filter 5 may refer to the description in FIG. 1, and the first filter 4 may also include multiple filters.
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the light emitting component 3.
  • the first light receiving component 21 is located on the reflective light path of the first filter 4, and the second light receiving component 22 is located on the reflective light path of the second filter 5.
  • the first filter 4 is used to transmit the upstream optical signal emitted by the optical transmitting component 3 to the optical fiber interface 1, and is also used to reflect the test optical signal received by the optical fiber interface 1 to the first optical receiving component 21. In this way, the first light receiving component 21 can receive the test light signal and detect the power of the received test light signal.
  • the first filter 4 is also used to transmit the service light signal received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 is used to reflect the service optical signal received by the optical fiber interface 1 to the second optical receiving component 22. In this way, the second optical receiving component 22 can receive the service optical signal and perform normal downlink service.
  • the second filter 5 can also be used to transmit the upstream optical signal emitted by the optical transmitter 3 to the first filter 4, and the first filter 4 is used to transmit the upstream optical signal to the optical fiber interface 1, so as to realize the normal upstream service of the ONT. .
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the light emitting component 3.
  • the second light receiving component 22 is located on the reflection light path of the first filter 4, and the first light receiving component 21 is located on the reflection light path of the second filter 5.
  • the first filter 4 is used to transmit the uplink optical signal emitted by the optical transmitting component 3 to the optical fiber interface 1, and is also used to reflect the service optical signal received by the optical fiber interface 1 to the second optical receiving component 22. In this way, the second optical receiving component 22 can receive the service optical signal and perform normal downlink service.
  • the first filter 4 is also used to transmit the test light signal received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 is used to reflect the test light signal received by the optical fiber interface 1 to the first light receiving component 21. In this way, the first light receiving component 21 can receive the test light signal and detect the power of the received test light signal.
  • the second filter 5 can also be used to transmit the upstream optical signal emitted by the light emitting component 3 to the first filter 4 to realize normal upstream services of the ONT.
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the second light receiving component 22.
  • the first light receiving component 21 is located on the reflective light path of the second filter 5, and the light emitting component 3 is located on the reflective light path of the first filter 4.
  • the first filter 4 is used to transmit the uplink optical signal emitted by the optical transmitting component 3 to the optical fiber interface 1 through reflection, so as to realize the normal uplink service of the ONT.
  • the first filter 4 is also used to transmit the test optical signals and service optical signals received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 is used to transmit the service light signal received by the optical fiber interface 1 to the second light receiving component 22.
  • the second filter 5 is also used to reflect the test light signal received by the optical fiber interface 1 to the first light receiving component 21.
  • the second optical receiving component 22 can receive the service optical signal and perform normal downlink services
  • the first optical receiving component 21 can receive the test optical signal and detect the power of the received test optical signal.
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the first light receiving component 21.
  • the second light receiving component 22 is located on the reflective light path of the second filter 5, and the light emitting component 3 is located on the reflective light path of the first filter 4.
  • the first filter 4 is used to transmit the uplink optical signal emitted by the optical transmitting component 3 to the optical fiber interface 1 through reflection, so as to realize the normal uplink service of the ONT.
  • the first filter 4 is also used to transmit the test optical signals and service optical signals received by the optical fiber interface 1 to the second filter 5.
  • the second filter 5 is used to reflect the service optical signal received by the optical fiber interface 1 to the second optical receiving component 22.
  • the second filter 5 is also used to transmit the test light signal received by the optical fiber interface 1 to the first light receiving component 21.
  • the second optical receiving component 22 can receive the service optical signal and perform normal downlink services
  • the first optical receiving component 21 can receive the test optical signal and detect the power of the received test optical signal.
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the first light receiving component 21.
  • the second light receiving component 22 is located on the reflective light path of the first filter 4, and the light emitting component 3 is located on the reflective light path of the second filter 5.
  • the second filter 5 is used to reflect the upstream optical signal emitted by the light transmitting assembly 3 to the first filter 4, and the first filter 4 is used to transmit the upstream optical signal emitted by the light transmitting assembly 3 to the optical fiber interface 1 to realize the ONT Normal uplink business.
  • the first filter 4 is also used to reflect the service optical signal received by the optical fiber interface 1 to the second light receiving component 22, and the first filter 4 is also used to transmit the test optical signal received by the optical fiber interface 1 to the second filter Piece 5.
  • the second filter 5 is also used to transmit the test light signal received by the optical fiber interface 1 to the first light receiving component 21.
  • the second optical receiving component 22 can receive the service optical signal and perform normal downlink services, and the first optical receiving component 21 can receive the test optical signal and detect the power of the received test optical signal.
  • the light receiving component 2 includes a first light receiving component 21 and a second light receiving component 22, and the second filter 5 is located on the transmission light path of the first filter 4. And it is located between the first filter 4 and the second light receiving component 22.
  • the first light receiving component 21 is located on the reflective light path of the first filter 4, and the light emitting component 3 is located on the reflective light path of the second filter 5.
  • the second filter sheet 5 is used to reflect the upstream optical signal emitted by the optical transmitter assembly 3 to the first filter sheet 4, and the first filter sheet 4 is used to transmit the upstream optical signal emitted by the optical transmitter assembly 3 to the optical fiber interface 1 to realize the ONT Normal uplink business.
  • the first filter 4 is also used to reflect the test light signal received by the optical fiber interface 1 to the first light receiving component 21, and the first filter 4 is also used to transmit the service light signal received by the optical fiber interface 1 to the second filter Piece 5.
  • the second filter 5 is also used to transmit the service light signal received by the optical fiber interface 1 to the second light receiving component 22.
  • the second optical receiving component 22 can receive the service optical signal and perform normal downlink services, and the first optical receiving component 21 can receive the test optical signal and detect the power of the received test optical signal.
  • the light receiving component 2 includes the first light receiving component 21 and the second light receiving component 22, it can also be added before the first light receiving component 21 and the second light receiving component 22.
  • Zero-degree filter the zero-degree filter added before the first optical receiving component 21 is used to filter other optical signals except the test optical signal
  • the zero-degree filter added before the second optical receiving component 22 is used to filter out the downstream business light Other optical signals besides the signal.
  • the ONT further includes a processor 6, and the processor 6 is electrically connected to the optical receiving component 2.
  • each port of the optical splitter in the ODN is provided with a reflection grating, and the wavelength of the optical signal that can be reflected by the reflection grating provided for each port is different.
  • Input test optical signals of multiple wavelengths for the ODN are composed of the wavelengths of the optical signals that can be reflected by the reflection grating set at each port of the ODN optical splitter.
  • the optical receiving component 2 of the ONT can detect the total power of the test optical signal and the service optical signal received each time.
  • the processor 6 may obtain the power of the service optical signal stored in advance, and the power may be the power of the service optical signal detected by the optical receiving component 2 when no test optical signal is input to the ODN.
  • the processor 6 may take the difference between each total power and the power of the service optical signal to obtain the first difference corresponding to each total power. Then the processor 6 can determine the magnitude of the first difference corresponding to each total power and the first value. If for a certain total power, the first difference corresponding to the total power is less than the first value, and it can determine that the total power belongs to The first wavelength of the received test optical signal.
  • the processor 6 sets the port that the ONT is connected to in the ODN as the port corresponding to the first wavelength. It should be noted here that the port corresponding to the first wavelength is the port where the reflection grating of the first wavelength is located, and the port belongs to the optical splitter.
  • the ONT further includes a processor 6, and the processor 6 is electrically connected to the optical receiving component 2.
  • each port of the optical splitter in the ODN is provided with a reflection grating, and the wavelength of the optical signal that can be reflected by the reflection grating provided for each port is different.
  • Input test optical signals of multiple wavelengths for the ODN are composed of the wavelengths of the optical signals that can be reflected by the reflection grating set at each port of the ODN optical splitter.
  • the optical receiving component 2 of the ONT can detect the total power of the test optical signal and the service optical signal received each time.
  • the processor 6 may determine the maximum value of the multiple detected total powers (ie, the maximum total power), and then calculate the second difference between the maximum value and each detected total power, and obtain the second difference corresponding to each total power. value.
  • the processor can determine the magnitude of the second difference and the second value corresponding to each total power.
  • the processor 6 determines the first wavelength of the received test optical signal when the second difference corresponding to the total power is greater than the second value.
  • the processor 6 may determine that the port connected by the ONT in the ODN is the port corresponding to the first wavelength. It should be noted here that the port corresponding to the first wavelength is the port where the reflection grating of the first wavelength is located, and the port belongs to the optical splitter.
  • the optical signal of the wavelength corresponding to the reflection grating will be reflected, so the test light signal of the wavelength corresponding to the reflection grating will be reflected back after incident on the reflection grating , And will not reach the ONT, so the ONT can only detect the power of the service optical signal, and then it can be determined that the ONT is connected to the port where the reflection grating is located in the ONT.
  • the above-mentioned multiple wavelengths are 8 wavelengths ( ⁇ 1- ⁇ 8), and the first difference between the total power detected by the ONT and the power of the service optical signal at ⁇ 1 and ⁇ 4 is less than the first value. It can be determined that the ports connected by the ONT in the ODN are the ports corresponding to ⁇ 1 and ⁇ 4 respectively.
  • the reflection gratings set at different ports of the first-stage optical splitter reflect the test light signals of different wavelengths
  • the reflection gratings set at different ports of the second-stage optical splitter can reflect The test optical signals of different wavelengths are reflected, and the wavelengths corresponding to the different ports of the first-stage optical splitter are the same or different from the wavelengths corresponding to the different ports of each optical splitter of the second-stage optical splitter.
  • the first-stage optical splitter includes 8 ports, and the wavelengths corresponding to the 8 ports are ⁇ 1- ⁇ 8, and each optical splitter of the second-stage optical splitter includes 8 ports, and the wavelengths corresponding to the 8 ports are ⁇ 1- ⁇ 8.
  • the first-stage optical splitter includes 8 ports, and the wavelengths corresponding to the 8 ports are ⁇ 1- ⁇ 8, and each splitter of the second-stage optical splitter includes 8 ports, and the wavelengths corresponding to the 8 ports are ⁇ 9- ⁇ 16.
  • the first wavelength determined by the processor 6 includes only one wavelength, which may indicate The port connected by the ONT in the ODN in the first-stage optical splitter is the port corresponding to the wavelength, and the port connected in the second-stage optical splitter is also the port corresponding to the wavelength.
  • the first filter 4 in each ONT may be composed of multiple filters, and the multiple filters cooperate with each other in addition to satisfying the function of the first filter 4. Minimize the size of the ONT.
  • the second filter 5 may be composed of multiple filters, and the multiple filters cooperate with each other to satisfy the function of the second filter 5 and also minimize the size of the ONT.
  • first filter 4 and the second filter 5 shown in the embodiment of the present application enable the transmission of optical signals to be carried out in the horizontal direction.
  • first filter can also be adjusted. 4 and the second filter 5 are deployed in such a way that the optical signal is transmitted in other directions.
  • the above process describes that the ONT is connected to the port corresponding to the first wavelength in the ODN, and the wavelength corresponding to the different ports of the first-stage optical splitter is the same as that of each optical splitter of the second-stage optical splitter.
  • the ports connected to the ONT in the ODN are the ports corresponding to ⁇ 1 and ⁇ 4, but it cannot be determined that the port corresponding to ⁇ 1 belongs to the first-stage optical splitter of the ODN It is still the second-level optical splitter, and it is also impossible to determine whether the port corresponding to ⁇ 4 belongs to the first-level optical splitter or the second-level optical splitter of the ODN).
  • the embodiment of the present application also provides for determining the corresponding first wavelength of the ONT connected in the ODN.
  • the level of the optical splitter that the port belongs to is processed as follows:
  • the processor 6 may also obtain the power detected by the optical receiving component 2 when the received test optical signal includes an optical signal with an offset wavelength, that is, the first total power and the second total power. Wherein, when the detected power is the first total power, the optical signal of the offset wavelength included in the test optical signal received by the optical receiving component 2 is the test optical signal of the target wavelength and the optical signal of the offset wavelength are input to the ODN together When the detected power is the second total power, the optical signal of the offset wavelength included in the test optical signal received by the optical receiving component 2 is the optical signal when the test optical signal of the target wavelength is not input to the ODN .
  • the test optical signal of the target wavelength will amplify the optical signal of the offset wavelength at the first port of the first-stage optical splitter of the ODN, instead of the offset wavelength at the second port of the second-stage optical splitter of the ODN
  • the optical signal of the target wavelength is subjected to amplification processing, and the reflection gratings set at the first port and the second port perform reflection processing on the test optical signal of the target wavelength.
  • the target wavelength is one of the aforementioned first wavelengths.
  • the first wavelength includes ⁇ 1 and ⁇ 4, and the target wavelength is ⁇ 1 or ⁇ 4.
  • the processor 6 may determine the third difference between the first total power and the second total power, and determine the magnitude of the third difference and the target threshold. If the third difference is greater than or equal to the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN, and it can be determined that the port corresponding to a wavelength other than the target wavelength in the first wavelength belongs to the second ODN Grade splitter. If the third difference is less than the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and it can be determined that the ports corresponding to the wavelengths other than the target wavelength in the first wavelength belong to the first-stage optical splitter of the ODN Device.
  • the threshold value of the deep amplification effect can amplify the optical signal of the offset wavelength.
  • the reflection grating set at the first port directly transmits the optical signal of the offset wavelength after the amplification process, so that the optical signal of the offset wavelength is transmitted to the ONT.
  • the intensity is relatively large, resulting in a relatively large first total power.
  • the test optical signal of the target wavelength is transmitted to the second port of the second-stage optical splitter of the ODN, although it is also reflected by the reflection grating set at the second port, it is attenuated by the first-stage optical splitter and the second-stage optical splitter.
  • the intensity of the test optical signal of the target wavelength after being reflected by the reflection grating set at the second port is relatively low, and the power of the second test optical signal after reflection is less than the threshold for the Brillouin amplification effect, and the optical signal of the shifted wavelength cannot be processed
  • the amplification processing makes the intensity of the optical signal of the offset wavelength transmitted to the ONT relatively low, resulting in a relatively low first total power.
  • the second total power represents the total power of the service optical signal and the test optical signal detected by the optical receiving component 2 when the test optical signal of the target wavelength is not input to the ODN together with the optical signal of the offset wavelength.
  • the optical signal is input to the total power of the service optical signal and the test optical signal detected by the ODN optical receiving component 2. Therefore, when the difference between the first total power and the second total power is relatively large, it means that the port corresponding to the target wavelength connected to the ONT belongs to the first-stage optical splitter of the ODN, and the difference between the first total power and the second total power If the value is relatively small, it indicates that the port corresponding to the target wavelength connected to the ONT belongs to the second-stage optical splitter of the ODN.
  • the ONT further includes a processor 6.
  • the processor 6 is electrically connected to the optical receiving component 2.
  • the processor 6 is connected to the first optical receiving component. 21 Electrical connection.
  • each port of the optical splitter in the ODN is provided with a reflection grating, and the reflection grating corresponding to each port is not the same wavelength (that is, the optical signal that each reflection grating can reflect) The wavelength is not the same).
  • the multiple wavelengths are composed of the wavelengths corresponding to the reflection gratings set at each port of the ODN optical splitter.
  • the first optical receiving component 21 of the ONT can detect the power of the test optical signal received each time.
  • the processor 6 may determine the maximum value among the multiple powers of the test optical signal received by the first optical receiving component 21, and then calculate the maximum power and the fourth power of each power of the test optical signal received by the first optical receiving component 21. Difference.
  • the processor determines the magnitude of the fourth difference corresponding to each power and the second value, and when the fourth difference corresponding to a certain power is greater than the second value, determines the test received by the first optical receiving component 21 corresponding to the power The first wavelength of the optical signal. Then the processor 6 may determine that the port connected by the ONT in the ODN is the port corresponding to the first wavelength.
  • the port corresponding to the first wavelength is the port provided with the reflection grating that reflects the test optical signal of the first wavelength in the ODN.
  • the reason why the port that the ONT is connected to in the ODN can be determined here is: because the ONT cannot receive the test optical signal of which wavelength, it means that the ONT is connected to a reflective grating that reflects the optical signal of that wavelength. Port, through this principle, the port that the ONT is connected to in the ODN can be determined.
  • the embodiment of the present application also provides for determining the port corresponding to the first wavelength connected to the ONT in the ODN.
  • the level of the splitter is processed as follows:
  • the processor 6 may also obtain the power detected by the first optical receiving component 21 when the received test optical signal includes an optical signal with an offset wavelength, that is, the first power and the second power. Wherein, when the detected power is the first power, the test optical signal received by the first optical receiving component 21 includes the optical signal of the offset wavelength and the test optical signal of the target wavelength that are input to the ODN together; When the detected power is the second power, the optical signal of the offset wavelength included in the test optical signal received by the first optical receiving component 21 is the optical signal when the test optical signal of the target wavelength is not input to the ODN together.
  • the test optical signal of the target wavelength will amplify the optical signal of the offset wavelength at the first port of the first-stage optical splitter of the ODN, instead of the offset wavelength at the second port of the second-stage optical splitter of the ODN
  • the optical signal of the target wavelength is subjected to amplification processing, and the reflection gratings set at the first port and the second port perform reflection processing on the test optical signal of the target wavelength.
  • the target wavelength is one of the wavelengths included in the first wavelength.
  • the processor 6 may determine the fifth difference between the first power and the second power, and determine the magnitude of the fifth difference and the target threshold. If the fifth difference is greater than or equal to the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN, and it can be determined that the port corresponding to a wavelength other than the target wavelength in the first wavelength belongs to the second ODN Grade splitter. If the fifth difference is less than the target threshold, it can be determined that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and it can be determined that the ports corresponding to the wavelengths other than the target wavelength in the first wavelength belong to the first-stage optical splitter of the ODN Device.
  • the principle here is the same as the principle described in the previous article, and will not be repeated here.
  • a device for outputting a test optical signal that is, a wavelength-adjustable laser
  • the tunable wavelength laser includes a laser 10, a beam splitter 20, a first optical modulator 30, and a light combiner 40.
  • the beam splitter 20 includes a first light exit port and a second light exit port.
  • the laser 10 can output test optical signals of multiple wavelengths, and the multiple wavelengths are the wavelengths of the optical signals that can be reflected by the reflection grating set at the port of the beam splitter in the ODN.
  • the beam splitter 20 may be located between the laser 10 and the first light modulator 30, and the beam splitter 20 is located at the light exit of the laser 10, and the first light modulator 30 is located at the first light exit of the beam splitter 20.
  • the light combiner 40 is located at the light exit of the first light modulator 30 and the second light exit of the beam splitter 20.
  • the beam splitter 20 is used to divide the test optical signal of the target wavelength output by the laser 10 into a first test optical signal and a second test optical signal, which are output through the first optical outlet and the second optical outlet respectively, and the first test optical signal is Will be input to the first light modulator 30.
  • the first optical modulator 30 can shift the wavelength of the first test optical signal by a target value to obtain an optical signal with a shifted wavelength.
  • the second test light signal output from the second light outlet enters the light combiner.
  • the light combiner 40 performs light combining processing on the second test light signal and the light signal of the shifted wavelength to obtain a light signal for output.
  • the optical combiner 40 may only output the second test optical signal, and when the second test optical signal does not exist, the optical combiner 40 may only output the offset wavelength. Light signal.
  • the target wavelength of the first-stage optical splitter in the OND corresponds to
  • the second test optical signal is reflected by the port of, and the power of the reflected second test optical signal is greater than or equal to the threshold for the Brillouin amplification effect, and the optical signal with the shifted wavelength can be amplified.
  • the port corresponding to the target wavelength of the second-stage optical splitter in the ODN performs reflection processing on the second test optical signal.
  • the second test optical signal after reflection processing is attenuated by the first-stage optical splitter and the second-stage optical splitter.
  • the tunable wavelength laser further includes a second optical modulator 50, and the second optical modulator 50 is located between the second light outlet of the beam splitter 20 and the light combiner 40.
  • the second optical modulator 50 can be used to adjust the power of the second test optical signal entering the second optical modulator 50, so that the power of the second test optical signal meets the target wavelength corresponding to the first-stage optical splitter of the ODN.
  • the port amplifies the optical signal of the offset wavelength, and the port corresponding to the target wavelength of the optical splitter except the first optical splitter in the ODN does not amplify the optical signal of the offset wavelength (the principle is described above).
  • the first optical modulator 30 may be an electro-optical modulator
  • the second optical modulator 50 may be a semiconductor modulator.
  • Step 1501 The tunable wavelength laser outputs a test optical signal of a target wavelength, where the target wavelength is the wavelength of any test optical signal among multiple test optical signals that can be output by the tunable wavelength laser.
  • the target wavelength is one of the wavelengths included in the first wavelength.
  • Step 1502 The tunable wavelength laser divides the test optical signal of the target wavelength into two optical signals, where the two optical signals include a first test optical signal and a second test optical signal.
  • the tunable wavelength laser can divide the test optical signal of the target wavelength into two optical signals, and the two optical signals may include the first test optical signal and the second test optical signal.
  • the wavelengths of the first test optical signal and the second test optical signal are both target wavelengths.
  • Step 1503 The tunable wavelength laser performs wavelength shift processing on the first test optical signal to obtain an optical signal with a shifted wavelength.
  • the tunable wavelength laser can shift the target wavelength of the first test optical signal by a target value to obtain an optical signal with a shifted wavelength.
  • the target value here may be 10 GHz.
  • the offset wavelength is the sum of the target wavelength and the wavelength corresponding to 10 GHz, or the offset wavelength is the difference between the target wavelength and the wavelength corresponding to 10 GHz.
  • Step 1504 the tunable wavelength laser synthesizes the second test optical signal and the optical signal of the shifted wavelength, and outputs the synthesized optical signal, where the second test optical signal is blocked at the port corresponding to the target wavelength of the first-stage optical splitter of the ODN
  • the reflected power is greater than or equal to the threshold for generating the Brillouin amplification effect
  • the reflected power of the second test optical signal at the port corresponding to the target wavelength of the second-stage optical splitter of the ODN is less than the threshold for generating the Brillouin amplification effect.
  • the tunable wavelength laser can output the second test optical signal and/or the optical signal with an offset wavelength, that is, output to the ODN.
  • the second test optical signal and the optical signal of the shifted wavelength exist at the same time, the second test optical signal and the optical signal of the shifted wavelength are combined into a single optical signal for output.
  • the port corresponding to the target wavelength of the first-level optical splitter performs reflection processing on the second test optical signal, and the power of the reflected second test optical signal is greater than or equal to the threshold that produces the Brillouin amplification effect. Perform magnification processing.
  • the port corresponding to the target wavelength of the second-stage optical splitter in the ODN performs reflection processing on the second test optical signal.
  • the second test optical signal after reflection processing is attenuated by the first-stage optical splitter and the second-stage optical splitter.
  • the power of the test optical signal detected by the ONT is the power of the optical signal of the offset wavelength after amplification processing, and the detected power is relatively large . If the port connected to the ONT is the port corresponding to the target wavelength of the second-stage optical splitter, the power of the test optical signal detected by the ONT is the power of the optical signal with the offset wavelength after being not amplified, and the detected power is relatively small , So it can be used to distinguish the level of the optical splitter to which the port connected by the ONT in the ODN belongs.
  • the optical signal of the shifted wavelength is amplified at the port corresponding to the target wavelength of the first-stage optical splitter of the ODN, and the first optical splitter is removed in the ODN.
  • the port corresponding to the target wavelength of the optical splitter outside the optical splitter does not amplify the optical signal of the offset wavelength.
  • the tunable wavelength laser can adjust the power of the second test optical signal, so that the tunable wavelength laser can combine the power-adjusted second test optical signal and the optical signal of the shifted wavelength into an optical signal, and output the optical signal. Signal to ODN.
  • the current OLT knows that the wavelength corresponding to a port connected to the ODN of the target ONT (any ONT) is the target wavelength.
  • the OLT can send the wavelength output to the tunable wavelength laser.
  • the wavelength output command is used to instruct the tunable wavelength laser to output a test optical signal of the target wavelength.
  • the tunable wavelength laser can output the test optical signal of the target wavelength.
  • the tunable wavelength laser can output the second test optical signal and the optical signal of the offset wavelength to the ODN.
  • the optical receiving component 2 of the ONT detects the first total power.
  • the first optical receiving component 21 of the ONT detects the first power.
  • the tunable wavelength laser may also receive a shutdown instruction of the second test optical signal.
  • the tunable wavelength laser can turn off the output of the second test optical signal, and only output the optical signal with the offset wavelength to the ODN.
  • the optical receiving component 2 of the ONT detects the second total power.
  • the first optical receiving component 21 of the ONT detects the second power.
  • the ONT may determine that the port corresponding to the target wavelength connected to the target ONT in the ODN belongs to the first-stage optical splitter or the second-stage optical splitter based on the first total power and the second total power.
  • the ONT may determine that the port corresponding to the target wavelength connected to the target ONT in the ODN belongs to the first-stage optical splitter or the second-stage optical splitter based on the first power and the second power (this process has been described in the foregoing, here No longer).
  • the process of detecting the port that the target ONT is connected to in the ODN is as follows:
  • the tunable wavelength laser receives the shutdown instruction of the output port where the optical signal with the offset wavelength is sent from the OLT, turns off the output of the output port where the optical signal with the offset wavelength is located, and outputs a variety of test lights in accordance with the preset wavelength order of the test optical signal Signal, a variety of test optical signals are used to determine the port that the target ONT is connected to in the ODN.
  • the OLT can send an instruction to turn off the optical signal of a shifted wavelength and an instruction to issue a variety of test optical signals to the tunable wavelength laser.
  • the tunable wavelength laser may receive these two instructions, and then turn off the output of the optical signal with the offset wavelength (specifically, it may turn off the output of the first optical modulator 30).
  • the tunable wavelength laser can send out a variety of test optical signals according to a preset wavelength sequence (it can be issued to the tunable wavelength laser through an instruction by the OLT, or pre-configured in the tunable wavelength laser). In this way, the tunable wavelength laser can output only the second test optical signal of each test optical signal.
  • the optical receiving component 2 of the ONT detects the total power of the second test optical signal and the service optical signal.
  • the first optical receiving component 21 of the ONT detects the second test optical signal. Power. In this way, the ONT can determine the port that the ONT is connected to in the ODN based on the total power or the power (this process has been described in the foregoing, and will not be repeated here).
  • a system for determining the topology of an optical access network includes an ONT 100, a tunable wavelength laser 200, and a wavelength division multiplexer 300 or coupler 400; specifically, the tunable wavelength
  • the laser 200 is shown in FIG. 13 and the tunable wavelength laser shown in FIG. 14, and the ONT 100 is shown in FIG.
  • the wavelength division multiplexer 300 and the coupler 400 may be used to combine the service optical signal and the test optical signal into a bundle of optical signals, where the service optical signal refers to the downstream service optical signal, that is, the service optical signal from the OLT to the ONT 100.
  • the system for determining the topology of the optical access network further includes an ODN 500, which is connected to the wavelength division multiplexer 300 or coupler 400, and the ODN 500 is connected to the ONT 100.
  • ODN500 includes a first-stage optical splitter and a second-stage optical splitter. Each port of the first-stage optical splitter and the second-stage optical splitter is provided with a reflection grating. The wavelength of the optical signal that the reflection grating can reflect is different from the wavelength of the service optical signal. same.
  • each port of the first-stage optical splitter and each port of the second-stage optical splitter are set with reflection gratings of the same wavelength.
  • each port of the optical splitter Reflective gratings of different wavelengths are used.
  • ODN500 includes a first-stage optical splitter and a second-stage optical splitter.
  • the first-stage optical splitter is a 1*8 optical splitter
  • the second-stage optical splitter includes eight 1*8 optical splitters.
  • the wavelengths of the optical signals that can be reflected by the reflective gratings set at different ports of the first-stage optical splitter are ⁇ 1- ⁇ 8, respectively, and the light that can be reflected by the reflective gratings respectively set at the different ports of any optical splitter in the second-stage optical splitter
  • the wavelength of the signal is ⁇ 1- ⁇ 8, respectively.
  • the second-stage beam splitter only shows one beam splitter.
  • each port of the first-stage optical splitter and each port of each optical splitter of the second-stage optical splitter are provided with reflection gratings of different wavelengths
  • each port of each optical splitter of the second-stage optical splitter is provided with reflection gratings of the same wavelength.
  • the first-stage optical splitter is a 1*8 optical splitter
  • the second-stage optical splitter includes eight 1*8 optical splitters.
  • the wavelengths are ⁇ 1- ⁇ 8, and the wavelengths of the optical signals that can be reflected by the reflective gratings respectively set at different ports of any splitter in the second-stage optical splitter are ⁇ 9- ⁇ 16, respectively.
  • the tunable wavelength laser 200 may be arranged in the OLT.
  • the tunable wavelength laser 200 and the ONT100 in the system for determining the topology of the optical access network can cooperate to determine the port that the ONT100 is connected to in the ODN500 (see the process in FIG. 15 and the process in FIG. 18) , Which determines the topology of the optical access network.
  • a method for determining the port connected to the ONT is also provided.
  • the execution subject of the method may be a port identification device.
  • the port identification device may be an ONT or an OLT, and of course, it may also be other terminals or Servers, etc., are not limited in the embodiment of the present application, and the port identification device is an ONT as an example for description as follows:
  • Step 1801 Obtain the difference between the first power and the second power corresponding to the target ONT, where the wavelength corresponding to a port of the target ONT connected in the optical distribution network ODN is the target wavelength; the offset wavelength is the target wavelength offset value
  • the obtained wavelength, the first power and the second power are the power when the optical signal received by the target ONT includes the optical signal with the offset wavelength; when the optical signal corresponds to the first power, it is input to the optical distribution network ODN together with the optical signal with the offset wavelength
  • the optical signal includes the test optical signal of the target wavelength; corresponding to the second power, the optical signal input to the ODN includes the optical signal of the offset wavelength and does not include the test optical signal of the target wavelength.
  • the test optical signal of the target wavelength is in the ODN
  • the reflected power of the port corresponding to the target wavelength of the first-stage optical splitter is greater than or equal to the threshold for the Brillouin amplification effect
  • the test optical signal of the target wavelength is reflected at the port corresponding to the target wavelength of the second-stage optical splitter of the ODN
  • the resulting power is less than the threshold for the Brillouin amplification effect.
  • the target ONT is any ONT
  • the wavelength corresponding to a port of the target ONT connected in the optical distribution network ODN is the target wavelength (that is, a wavelength included in the first wavelength mentioned above)
  • the offset wavelength is the target wavelength offset The wavelength of the target value.
  • the target ONT can obtain the first power and the second power.
  • the first power is the power when the optical signal received by the target ONT includes an optical signal with an offset wavelength.
  • the optical signal input from the tunable wavelength laser to the ODN is the test optical signal of the target wavelength and the optical signal of the offset wavelength. In this way, the optical signal input to the ODN includes the test optical signal of the target wavelength and the optical signal of the shifted wavelength.
  • the second power is the power when the optical signal received by the target ONT includes an optical signal with an offset wavelength.
  • the optical signal input from the tunable wavelength laser to the ODN is an optical signal with an offset wavelength. In this way, the optical signal input to the ODN is an optical signal with a shifted wavelength.
  • the target ONT may determine the difference between the first power and the second power.
  • test optical signal of the target wavelength amplifies the optical signal of the offset wavelength at the port corresponding to the target wavelength of the first-stage optical splitter of the ODN, and the optical signal of the shifted wavelength is processed at the target wavelength of the second-stage optical splitter of the ODN.
  • the corresponding port does not amplify the optical signal with the offset wavelength.
  • the OLT can notify the ONT of the wavelength of the optical signal sent this time, and inform whether the test optical signal of the target wavelength is input this time. In this way, the ONT can know which power detected is the first power and which power is the second power, and subsequently can determine whether the port of the target wavelength connected to the target ONT in the ODN belongs to the first-stage optical splitter or the second-stage optical splitter .
  • Step 1802 if the difference is greater than or equal to the target threshold, it is determined that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN; if the difference is less than the target threshold, it is determined that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN .
  • the target ONT can determine the magnitude of the difference between the first power and the second power and the target threshold. If the difference between the first power and the second power is greater than or equal to the target threshold, the target ONT can determine that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN, and can determine the other wavelength in the first wavelength other than the target wavelength The port corresponding to the wavelength belongs to the second-stage optical splitter of the ODN. If the difference is less than the target threshold, the target ONT can determine that the port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and can determine that the port corresponding to another wavelength in the first wavelength other than the target wavelength belongs to the first-stage ODN Splitter.
  • the port of the target wavelength belongs to the first-stage optical splitter. Since the difference between the first power and the second power is relatively small, it indicates that the intensity of the optical signal of the offset wavelength received by the target ONT is relatively low, and it indicates that the test optical signal of the target wavelength does not amplify the optical signal of the offset wavelength. It can be determined that the port of the target wavelength belongs to the second-stage optical splitter.
  • FIG. 18 corresponds to the target ONT in FIG. 1, the first power and second power corresponding to the target ONT are the total power of the optical signal with the offset wavelength and the service optical signal, that is, the first power is The first total power and the second power above are the second total power above. If Figure 18 corresponds to the target ONT in Figures 4 to 9, then the first power and second power corresponding to the target ONT are offset wavelengths. The power of the optical signal, that is, the first power is the first power above, and the second power is the second power above.
  • an embodiment of the present application also provides a method for determining the port that the target ONT is connected to in the ODN, and the processing may be as follows:
  • the third power when the optical signal received by the target ONT includes the test optical signal of one wavelength, one wavelength is any one of multiple wavelengths, and the multiple wavelengths correspond to different ports of each optical splitter with ODN Determine the difference between the third power corresponding to each wavelength and the power of the service optical signal. If the difference between the third power corresponding to the first wavelength and the power of the service optical signal is less than the first value, it is determined that the target ONT is The port connected in the ODN is the port corresponding to the first wavelength.
  • the target ONT may obtain the third power when the optical signal received by the target ONT includes a test optical signal of one wavelength.
  • the one wavelength is any one of multiple wavelengths, and the multiple wavelengths are wavelengths corresponding to different ports of each optical splitter of the ODN.
  • each optical splitter includes 8 ports, and the 8 ports correspond to ⁇ 1- ⁇ 8 respectively. In this way, the target ONT can obtain 8 third powers.
  • the target ONT may calculate the difference between the third power corresponding to each wavelength and the power of the service optical signal. Determine the difference between the third power corresponding to each wavelength and the power of the service optical signal and the first value. If the difference between the third power corresponding to the first wavelength and the power of the service optical signal is less than the first value, then It can be determined that the port to which the target ONT is connected in the ODN is the port corresponding to the first wavelength. This is because the third power corresponding to the first wavelength is relatively small, indicating that the optical signal of the first wavelength is reflected and does not enter the target ONT, then the port connected to the target ONT in the ODN is the port corresponding to the first wavelength.
  • an embodiment of the present application also provides a method for determining the port that the target ONT is connected to in the ODN, and the processing may be as follows:
  • the third power when the optical signal received by the target ONT includes the test optical signal of one wavelength, one wavelength is any one of multiple wavelengths, and the multiple wavelengths correspond to different ports of each optical splitter with ODN Determine the difference between the maximum power and the third power corresponding to each wavelength; if the difference between the maximum power and the third power corresponding to the target wavelength is greater than the second value, determine the port connected to the target ONT in the ODN as the target The port corresponding to the wavelength.
  • the target ONT may obtain the third power when the optical signal received by the target ONT includes a test optical signal of one wavelength.
  • the one wavelength is any one of multiple wavelengths, and the multiple wavelengths are wavelengths corresponding to different ports of each optical splitter of the ODN.
  • each optical splitter includes 8 ports, and the 8 ports correspond to ⁇ 1- ⁇ 8 respectively. In this way, the target ONT can obtain 8 third powers.
  • the target ONT can determine the maximum power among multiple third powers, and then respectively calculate the difference between the maximum power and the third power corresponding to each wavelength.
  • the difference between the maximum power and the third power corresponding to the target wavelength is greater than the second value
  • the target ONT may determine that its own port connected in the ODN is the port corresponding to the target wavelength. For example, if the target ONT is connected to the port corresponding to ⁇ 1 of ODN and the port corresponding to ⁇ 8, it can be determined that the difference between the maximum power and the third power corresponding to ⁇ 1 is greater than the second value, and the difference between the maximum power and the third power corresponding to ⁇ 8 The value is greater than the second value.
  • the ONT is used as the execution subject to determine the level of the optical splitter to which the port connected to the target ONT in the ODN belongs.
  • the OLT may also be the execution subject in the embodiment of the present application. Determine the level of the optical splitter to which the port connected to the target ONT in the ODN belongs, and the process of determining the port connected to the target ONT in the ODN is the same as that in the ONT, except that the target ONT also needs to send the power detected by the target ONT to the OLT.
  • the target ONT can send the first power and the second power detected by the ONT to the OLT. After receiving the first power and the second power, the OLT can determine the difference between the first power and the second power.
  • the target OLT can control the tunable wavelength laser to emit the test optical signal of the target wavelength, and send a notification to the target ONT to send the detected first power, and the target OLT can also control the tunable wavelength laser to send the test optical signal of the target wavelength. , And stop outputting the test optical signal of the target wavelength, output only the optical signal of the offset wavelength, and send a notification to the target ONT to send the detected second power.
  • the target ONT can send the detected first power to the OLT, and the target ONT can also send the detected second power to the OLT.
  • the OLT determines the order of receiving the first power and the second power, and will receive the power first. As the first power, the power received later is used as the second power.
  • the target ONT can send the intermediate processing data to the OLT. For example, the target ONT sends the difference between the first power and the second power to the OLT.
  • the ONT is used as the executive body to determine the port to which the target ONT is connected in the ODN.
  • the OLT may also be used as the executive body to determine the port to which the target ONT is connected in the ODN.
  • the ONT may also send the third power corresponding to each wavelength to the OLT, and the OLT determines the port to which the target ONT is connected in the ODN based on the third power corresponding to each wavelength.
  • the target ONT may also send the intermediate processing data to the OLT.
  • the intermediate processing data may also include the difference between the maximum power of the third power corresponding to multiple wavelengths and the third power corresponding to each wavelength. The OLT is based on each difference.
  • the OLT controls the tunable wavelength laser to emit test optical signals of multiple wavelengths according to a preset wavelength sequence, and the OLT issues a notification to the target ONT, instructing the target ONT to send the multiple detected powers to the OLT.
  • the target ONT can be sent to the OLT in the order in which the power is detected. In this way, the OLT can sequentially correspond multiple wavelengths with the power sent by the target ONT based on the sequence of the target ONT's transmit power, that is, obtain the third power corresponding to each wavelength.
  • the principle of amplifying the optical signal of the offset wavelength by the test optical signal of the target wavelength is the stimulated Brillouin amplification effect, and the test optical signal of the target wavelength is used as the pump light.
  • FIG. 19 a schematic diagram of amplifying the optical signal of the offset wavelength at the port corresponding to the target wavelength of the first-stage optical splitter by the test optical signal of the target wavelength is also provided.
  • the aforementioned port identification device includes a memory 2001 and a processor 2002.
  • the memory 2001 may be a read-only memory (Read-Only Memory, ROM), a static storage device, a dynamic storage device, and the like.
  • the memory 2001 may store computer instructions. When the computer instructions stored in the memory 2001 are executed by the processor 2002, the processor 2002 is used to execute a fault location method.
  • the memory can also store data.
  • the processor 2002 may adopt a general central processing unit (Central Processing Unit, CPU), an application ASIC, a graphics processing unit (Graphics Processing Unit, GPU), or any combination thereof.
  • the processor 2002 may include one or more chips.
  • FIG. 21 is a structural diagram of an apparatus for determining a port connected to an optical network terminal according to an embodiment of the present application.
  • the device can be implemented as part or all of the device through software, hardware, or a combination of the two.
  • the device provided in the embodiment of the present application can implement the process described in the embodiment 18 of the present application.
  • the device includes: an acquisition module 2110 and a determination module 2120, of which:
  • the obtaining module 2110 is configured to obtain the difference between the first power and the second power corresponding to the target ONT, where the wavelength corresponding to the port connected to the target ONT in the optical distribution network ODN is the first wavelength, and the first wavelength One wavelength included is the target wavelength; the offset wavelength is the wavelength obtained by shifting the target wavelength from the target value, and the first power and the second power are the optical signals received by the target ONT including the offset
  • the optical signal input to the ODN includes the test optical signal of the target wavelength and the optical signal of the offset wavelength
  • the optical signal corresponds to the second power
  • the optical signal input to the ODN includes the optical signal of the offset wavelength and does not include the test optical signal of the target wavelength, and the test optical signal of the target wavelength is in the first-stage optical splitter of the ODN
  • the reflected power of the port corresponding to the target wavelength is greater than or equal to the threshold of the Brillouin amplification effect, and the test optical signal of the target wavelength is reflected at the port
  • the determining module 2120 is configured to determine that the port corresponding to the target wavelength belongs to the first-stage optical splitter of the ODN if the difference is greater than or equal to the target threshold; if the difference is less than the target threshold, determine The port corresponding to the target wavelength belongs to the second-stage optical splitter of the ODN, and may be specifically used to implement the determining function of step 1802 and the implicit steps included in step 1802.
  • the acquisition module 2110 is further configured to acquire the third power when the optical signal received by the target ONT includes a test optical signal of one wavelength, and the one wavelength is more than one wavelength. Any one of the various wavelengths, and the multiple wavelengths are wavelengths corresponding to different ports of each optical splitter of the ODN;
  • the determining module 2120 is further configured to determine the difference between the third power corresponding to each wavelength and the power of the service optical signal; if the difference between the third power corresponding to the first wavelength and the power of the service optical signal is less than the first value , It is determined that the port to which the target ONT is connected in the ODN is the port corresponding to the first wavelength.
  • the division of modules in the above embodiments of the present application is illustrative, and it is only a logical function division. In actual implementation, there may also be other division methods.
  • the functional modules in the various embodiments of the present application may be integrated in A processor may also exist alone physically, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules.
  • the computer program product includes one or more computer instructions, and when the computer program instructions are loaded and executed on the OLT, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer-readable storage medium may be any available medium that can be accessed by the OLT or a data storage device such as a server or data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape, etc.), an optical medium (such as a digital video disk (Digital Video Disk, DVD), etc.), or a semiconductor medium (such as a solid-state hard disk, etc.).
  • a magnetic medium such as a floppy disk, a hard disk, a magnetic tape, etc.
  • an optical medium such as a digital video disk (Digital Video Disk, DVD), etc.
  • a semiconductor medium such as a solid-state hard disk, etc.

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Abstract

本申请提供了一种光网络终端和确定光网络终端连接的端口的方法,涉及光纤通信技术领域。该光网络终端包括:光纤接口、光接收组件、光发射组件、第一滤波片和第二滤波片,光纤接口与光发射组件之间设置有第一滤波片,且光发射组件位于第一滤波片的透射光路上,第一滤波片用于将光发射组件发出的上行光信号透射至光纤接口,光接收组件通过与第一滤波片、第二滤波片配合实现接收测试光信号和业务光信号,测试光信号的波长与业务光信号的波长不相同。采用本申请,可以降低ONT的实现难度。

Description

光网络终端和确定光网络终端连接的端口的方法
本申请要求于2020年4月29日提交中国国家知识产权局、申请号为202010358089.4、发明名称为“光网络终端和确定光网络终端连接的端口的方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光纤通信技术领域,特别涉及一种光网络终端和确定光网络终端连接的端口的方法。
背景技术
随着光纤通信技术的发展,无源光网络(Passive Optical Network,PON)得到快速的发展与大规模部署。PON是点对多点的系统,由光线路终端(Optical Line Terminal,OLT)、光分配网络(Optical Distribution Network,ODN)和光网络终端(Optical network terminal,ONT)顺序连接构成。其中,ODN是无源光网络,全部由无源器件组成,主要包括光纤和分光器(Splitter)。由于ODN通过点对点的连接方法实现光信号从OLT至ONT的传输,有着覆盖地域广泛、分支光路数据庞大、场景复杂等特点,再加上其自身没有供电,造成了ODN的故障定位排查困难,故障定位的准确率尤为重要,而要实现故障定位,就需要准确的识别出ONT在ODN中连接的端口。
相关技术中,为了识别ONT在ODN中连接的端口,在ODN的每个分光器的端口设置反射光栅,对于一个分光器,该分光器的不同端口设置反射不同波长光信号的反射光栅,对于第i(i大于或等于2)级分光器中的分光器,该每两个分光器各端口设置的反射光栅分别反射的光信号的波长均为λ1-λn,n为第i级分光器中每个分光器的端口数目。在ONT侧,为ONT外接一个外接设备,该外接设备用于检测接收到的测试光信号的功率,这样,可以往ODN中输入多种波长的测试光信号,该多种波长由ODN中每个分光器的端口设置的反射光栅所能反射的光信号的波长组成。这样,若某个ONT的外接设备接收到某个波长的测试光信号的功率最小,说明该波长的测试光信号被反射光栅反射,可以确定该波长对应的反射光栅所在的端口为该ONT在ODN中连接的端口。
由于对于每个ONT均需要连接一个外接设备才能确定出ONT在ODN中连接的端口,所以会造成ONT的实现难度大。
发明内容
本申请实施例提供了一种光网络终端和确定光网络终端连接的端口的方法,采用本申请可以降低ONT的实现难度和高效率的确定ONT在ODN中连接的端口。
第一方面,提供了一种ONT,该ONT包括光纤接口、光接收组件、光发射组件、第一滤波片和第二滤波片。光纤接口与光发射组件之间设置有第一滤波片,且光发射组件位于第一滤波片的透射光路上,第一滤波片用于将光发射组件发出的上行光信号透射至光纤接口;光接 收组件通过与第一滤波片、第二滤波片配合实现接收测试光信号和业务光信号,测试光信号的波长与业务光信号的波长不相同。测试光信号用于确定ONT在ODN中连接的端口、以及ONT在ODN中连接的端口所属的分光器的级别。这样,可以通过一个ONT实现测试光信号和业务光信号的接收。
在一种可能的实现方式中,光接收组件和第二滤波片位于第一滤波片的反射光路上;第一滤波片还用于将光纤接口接收到的测试光信号和业务光信号反射至第二滤波片;第二滤波片用于将测试光信号和业务光信号透射至光接收组件。
本申请所示的方案,光接收组件和第二滤波片位于第一滤波片的反射光路上。第一滤波片除了用于将光发射组件发出的上行光信号透射至光纤接口,还可以用于将光纤接口接收到的测试光信号和下行的业务光信号反射至第二滤波片。第二滤波片可以用于将测试光信号和下行的业务光信号透射至光接收组件。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件;第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与光发射组件之间;第一光接收组件位于第一滤波片的反射光路上;第二光接收组件位于第二滤波片的反射光路上;第一滤波片还用于将光纤接口接收到的测试光信号反射至第一光接收组件,将光纤接口接收到的业务光信号透射至第二滤波片;第二滤波片用于将光纤接口接收到的业务光信号反射至第二光接收组件,第二滤波片还用于将光发射组件发出的上行光信号透射至第一滤波片。
这样,一个ONT中包括两个光接收组件,分别用于接收下行的业务光信号和测试光信号,所以可以通过一个ONT实现测试光信号和下行的业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件;第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与光发射组件之间;第二光接收组件位于第一滤波片的反射光路上;第一光接收组件位于第二滤波片的反射光路上;第一滤波片还用于将光纤接口接收到的业务光信号反射至第二光接收组件,将光纤接口接收到的测试光信号透射至第二滤波片;第二滤波片用于将光纤接口接收到的测试光信号反射至第一光接收组件,第二滤波片还用于将光发射组件发出的上行光信号透射至第一滤波片。
这样,一个ONT中包括两个光接收组件,分别用于接收下行的业务光信号和测试光信号,所以可以通过一个ONT实现测试光信号和下行的业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,ONT还包括处理器,处理器与光接收组件电性连接;处理器用于确定接收到的测试光信号和业务光信号的每个总功率与业务光信号的功率的第一差值,确定第一差值小于第一数值时接收到的测试光信号的第一波长,确定ONT连接的ODN的端口为第一波长对应的端口;或者,处理器用于确定最大总功率与接收到的测试光信号和业务光信号的每个总功率的第二差值,确定第二差值大于第二数值时接收到的测试光信号的第一波长;确定ONT连接的ODN的端口为第一波长对应的端口,该最大总功率为接收到的测试光信号和业务光信号的多个总功率中的最大值。
本申请所示的方案,ONT还包括处理器,处理器与光接收组件电性连接。为了确定ONT在ODN中连接的端口,ODN中的分光器的每个端口设置有反射光栅,且每个端口设置的反射光栅所能反射的光信号的波长不相同。为ODN输入多种波长的测试光信号,多种波长由ODN的分光器的每个端口设置的反射光栅所能反射的光信号的波长组成。ONT的光接收组件可以检测每次接收到的测试光信号和业务光信号的总功率。处理器可以获取预先存储的业务光信号的 功率,该功率可以是在没有测试光信号输入ODN时,光接收组件检测到的功率。处理器可以将每个总功率与业务光信号的功率取差值,获得每个总功率对应的第一差值。然后处理器可以判断每个总功率对应的第一差值与第一数值的大小,若对于某个总功率,该总功率对应的第一差值小于第一数值,可以确定该总功率所属的接收到的测试光信号的第一波长。处理器将ONT在ODN中连接的端口为第一波长对应的端口。
或者,ONT的光接收组件可以检测每次接收到的测试光信号和业务光信号的总功率。处理器可以确定检测的多个总功率中的最大值(即最大总功率),然后计算最大值与检测到的每个总功率的第二差值,获得每个总功率对应的第二差值。处理器可以判断每个总功率对应的第二差值与第二数值的大小。处理器确定总功率对应的第二差值大于第二数值时,接收到的测试光信号的第一波长。这样,可以确定出ONT在ODN中连接的端口。
在一种可能的实现方式中,处理器还用于确定第一总功率与第二总功率的第三差值,第一总功率和第二总功率为光接收组件接收到的测试光信号包括偏移波长的光信号时的功率;对应第一总功率时,输入至ODN的光信号包括目标波长的测试光信号和偏移波长的光信号;对应第二总功率时,输入至ODN中的光信号包括偏移波长的光信号且未包括目标波长的测试光信号;偏移波长为目标波长偏移目标数值获得的波长,目标波长的测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,目标波长的测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值,在第一波长包括多个波长的情况下,目标波长为第一波长中的一个波长;若第三差值大于或等于目标阈值,则确定目标波长对应的端口属于ODN的第一级分光器;若第三差值小于目标阈值,则确定设置有目标波长对应的端口属于ODN的第二级分光器。
本申请所示的方案,处理器还可以获取光接收组件在接收到的测试光信号包括偏移波长的光信号时检测到的功率,即第一总功率和第二总功率。其中,在检测到的功率为第一总功率时,光接收组件接收到的测试光信号包括的偏移波长的光信号是目标波长的测试光信号和偏移波长的光信号一起输入至ODN时的光信号,在检测到的功率为第二总功率时,光接收组件接收到的测试光信号包括的偏移波长的光信号是目标波长的测试光信号未输入至ODN时的光信号。具体的,目标波长的测试光信号会在ODN的第一级分光器的第一端口对偏移波长的光信号进行放大处理,而不在ODN的第二级分光器的第二端口对偏移波长的光信号进行放大处理,第一端口和第二端口设置的反射光栅对目标波长的测试光信号进行反射处理。目标波长为第一波长中的一个。处理器可以确定第一总功率与第二总功率的第三差值,判断第三差值与目标阈值的大小。若第三差值大于或等于目标阈值,则可以确定目标波长对应的端口属于ODN的第一级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第二级分光器。若第三差值小于目标阈值,则可以确定目标波长对应的端口属于ODN的第二级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第一级分光器。这样,可以准确的确定出ONT在ODN中连接的端口所属的分光器的级别。
在一种可能的实现方式中,ONT还包括处理器,处理器与第一光接收组件电性连接;处理器用于确定最大功率与第一光接收组件接收到的测试光信号的每个功率的第四差值,确定第四差值大于第二数值时,第一光接收组件接收到的测试光信号的第一波长,确定ONT连接的ODN的端口为第一波长对应的端口,最大功率为接收到的测试光信号的多个功率中的最大值。
本申请所示的方案,ONT还包括处理器,处理器与光接收组件电性连接,当然处理器与第 一光接收组件电性连接。为了确定ONT在ODN中连接的端口,ODN中的分光器的每个端口设置有反射光栅,且每个端口设置的反射光栅对应的波长不相同(即每个反射光栅所能反射的光信号的波长不相同)。为ODN输入多种波长的测试光信号,多种波长由ODN的分光器的每个端口设置的反射光栅对应的波长组成。ONT的第一光接收组件可以检测每次接收到的测试光信号的功率。处理器可以确定第一光接收组件接收到的测试光信号的多个功率中的最大值,然后计算最大功率与第一光接收组件接收到的测试光信号的每个功率的第四差值。处理器判断每个功率对应的第四差值与第二数值的大小,在某个功率对应的第四差值大于第二数值时,确定该功率对应的第一光接收组件接收到的测试光信号的第一波长。然后处理器可以确定ONT在ODN中连接的端口为第一波长对应的端口。第一波长对应的端口即为ODN中设置有对第一波长的测试光信号进行反射的反射光栅的端口。这样,可以确定出ONT在ODN中连接的端口。
在一种可能的实现方式中,光发射组件位于第一滤波片的反射光路上。光接收组件和第二滤波片位于第一滤波片的透射光路上。第一滤波片除了用于将光发射组件发出的上行光信号反射至光纤接口,还可以用于将光纤接口接收到的测试光信号和业务光信号透射至第二滤波片。第二滤波片可以用于将测试光信号和业务光信号透射至光接收组件。这样,光接收组件可以接收到测试光信号和业务光信号。光接收组件可以检测接收到的测试光信号和业务光信号的总功率。其中,业务光信号为下行的业务光信号。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件,第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与第二光接收组件之间。第一光接收组件位于第二滤波片的反射光路上,光发射组件位于第一滤波片的反射光路上。第一滤波片用于将光发射组件发射的上行光信号通过反射传输至光纤接口,实现ONT正常的上行业务。第一滤波片还用于将光纤接口接收到的测试光信号和业务光信号透射至第二滤波片。第二滤波片用于将光纤接口接收到的业务光信号透射至第二光接收组件。第二滤波片还用于将光纤接口接收到的测试光信号反射至第一光接收组件。这样,第二光接收组件可以接收到业务光信号,进行正常的下行业务,第一光接收组件可以接收到测试光信号,检测接收到的测试光信号的功率。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件,第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与第一光接收组件之间。第二光接收组件位于第二滤波片的反射光路上,光发射组件位于第一滤波片的反射光路上。第一滤波片用于将光发射组件发射的上行光信号通过反射传输至光纤接口,实现ONT正常的上行业务。第一滤波片还用于将光纤接口接收到的测试光信号和业务光信号透射至第二滤波片。第二滤波片用于将光纤接口接收到的业务光信号反射至第二光接收组件。第二滤波片还用于将光纤接口接收到的测试光信号透射至第一光接收组件。这样,第二光接收组件可以接收到业务光信号,进行正常的下行业务,第一光接收组件可以接收到测试光信号,检测接收到的测试光信号的功率。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件,第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与第一光接收组件之间。第二光接收组件位于第一滤波片的反射光路上,光发射组件位于第二滤波片的反射光路上。第二滤波片 用于将光发射组件发射的上行光信号反射至第一滤波片,第一滤波片用于将光发射组件发射的上行光信号透射至光纤接口,实现ONT正常的上行业务。第一滤波片还用于将光纤接口接收到的业务光信号反射至第二光接收组件,第一滤波片还用于将光纤接口接收到的测试光信号透射至第二滤波片。第二滤波片还用于将光纤接口接收到的测试光信号透射至第一光接收组件。这样,第二光接收组件可以接收到业务光信号,进行正常的下行业务,第一光接收组件可以接收到测试光信号,检测接收到的测试光信号的功率。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
在一种可能的实现方式中,光接收组件包括第一光接收组件和第二光接收组件,第二滤波片位于第一滤波片的透射光路上,且位于第一滤波片与第二光接收组件之间。第一光接收组件位于第一滤波片的反射光路上,光发射组件位于第二滤波片的反射光路上。第二滤波片用于将光发射组件发射的上行光信号反射至第一滤波片,第一滤波片用于将光发射组件发射的上行光信号透射至光纤接口,实现ONT正常的上行业务。第一滤波片还用于将光纤接口接收到的测试光信号反射至第一光接收组件,第一滤波片还用于将光纤接口接收到的业务光信号透射至第二滤波片。第二滤波片还用于将光纤接口接收到的业务光信号透射至第二光接收组件。这样,第二光接收组件可以接收到业务光信号,进行正常的下行业务,第一光接收组件可以接收到测试光信号,检测接收到的测试光信号的功率。这样,可以通过一个ONT实现测试光信号和业务光信号的接收,降低ONT的实现难度。
第二方面,提供了一种可调波长激光器,可调波长激光器包括激光器、分束器、第一光调制器和合光器,分束器包括第一出光口和第二出光口;激光器用于输出多种波长的测试光信号;分束器位于激光器与第一光调制器之间,且分束器位于激光器的出光口,第一光调制器位于分束器的第一出光口;分束器用于将进入分束器的目标波长的测试光信号分为第一测试光信号和第二测试光信号,分别通过第一出光口和第二出光口输出,其中,目标波长属于多种波长;合光器位于第一光调制器的出光口和分束器的第二出光口;第一光调制器用于将第一测试光信号的波长偏移目标数值,获得偏移波长的光信号,合光器用于合成第二测试光信号和偏移波长的光信号,输出合成后的光信号,第二测试光信号在ODN的第一级分光器的第一端口被反射后的功率大于或等于产生布里渊放大效应的阈值,第二测试光信号在ODN的第二级分光器的第二端口被反射后的功率小于产生布里渊放大效应的阈值,第一端口设置的反射光栅的中心波长为目标波长,第二端口设置的反射光栅的中心波长为目标波长。这样,可以通过可调波长激光器产生两路光信号,一路光信号为第二测试光信号,另一路光信号为对第二测试光信号的波长进行偏移,获得的偏移波长光信号。
在一种可能的实现方式中,可调波长激光器还包括第二光调制器;第二光调制器位于分束器的第二出光口与合光器之间;第二光调制器用于调整进入第二光调制器的第二测试光信号的功率。这样,可以灵活的控制第二测试光信号的功率。
第三方面,提供了一种确定光接入网的拓扑的系统,该系统包括可调波长激光器、ONT,以及波分复用器或者耦合器,其中:可调波长激光器为第二方面的可调波长激光器;ONT为第一方面的ONT;波分复用器或者耦合器用于将业务光信号和测试光信号合成一束光信号。这样,可以高效率的确定出光接入网络的拓扑。
在一种可能的实现方式中,该系统还包括ODN;ODN与波分复用器或耦合器连接,ODN与ONT连接;ODN包括第一级分光器和第二级分光器,第一级分光器和第二级分光器的各端口设置有反射光栅,反射光栅所能反射的光信号的波长与业务光信号的波长不相同。这样,可以 通过在ODN的分光器的端口设置反射光栅,来确定光接入网的拓扑,提高确定光接入网的拓扑的效率。
在一种可能的实现方式中,第一级分光器的各端口与第二级分光器的每个分光器的各端口设置相同波长的反射光栅;对于第一级分光器和第二级分光器中任一分光器,分光器的各端口采用不同波长的反射光栅。这样,由于每个分光器的端口设置相同波长的反射光栅,所以可以减少测试光信号的波长的数目,进而可以降低可调波长激光器的波长调节范围。
在一种可能的实现方式中,可调波长激光器设置在OLT中。
第四方面,提供了一种输出测试光信号的方法,应用于第二方面的可调波长激光器;该方法包括:输出目标波长的测试光信号,其中,目标波长属于可调波长激光器可输出的多种测试光信号的波长;将目标波长的测试光信号分为两束光信号,其中,两束光信号包括第一测试光信号和第二测试光信号;对第一测试光信号进行波长偏移处理,获得偏移波长的光信号;合成第二测试光信号和偏移波长的光信号,输出合成后的光信号,其中,第二测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,第二测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。
本申请所示的方案,可调波长激光器可以输出目标波长的测试光信号,可调波长激光器可以将目标波长的测试光信号分为两束光信号,该两束光信号可以包括第一测试光信号和第二测试光信号。第一测试光信号和第二测试光信号的波长均为目标波长。可调波长激光器可以对第一测试光信号的目标波长偏移目标数值,获得偏移波长的光信号。可调波长激光器可以将第二测试光信号和/或偏移波长的光信号进行输出,即输出至ODN。第二测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,第二测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。即第二测试光信号用于在ODN的第一级分光器的目标波长对应的端口对偏移波长的光信号进行放大处理,且用于在ODN中除第一分光器之外的分光器的目标波长对应的端口不对偏移波长的光信号进行放大处理。这样,若ONT连接的端口为第一级分光器的目标波长对应的端口,则ONT检测到的测试光信号的功率为放大处理后的偏移波长的光信号的功率,检测到的功率比较大,若ONT连接的端口为第二级分光器的目标波长对应的端口,则ONT检测到的测试光信号的功率为未放大处理后的偏移波长的光信号的功率,检测到的功率比较小,所以可以用于区分ONT在ODN中连接的端口所属的分光器的级别。
在一种可能的实现方式中,该方法还包括:对第二测试光信号的功率进行调整;合成第二测试光信号和偏移波长的光信号,包括:合成偏移波长的光信号和调整功率后的第二测试光信号。这样,可以灵活的调整第二测试光信号的功率。
在一种可能的实现方式中,目标波长为目标光网络终端ONT在光分配网络ODN中连接的端口对应的波长;目标波长的测试光信号用于测试目标ONT在ODN中连接的端口所属的分光器的级别,目标波长为目标ONT在ODN中连接的端口对应的波长中的一个波长;合成第二测试光信号和偏移波长的光信号之前,还包括:接收OLT发送的波长输出指令,其中,波长输出指令用于指示输出目标波长的测试光信号;该方法还包括接收OLT发送的第二测试光信号的关闭指令;停止输出第二测试光信号的输出,并输出偏移波长的光信号。
本申请所示的方案,当前OLT知晓目标ONT(任一ONT)在ODN中连接的一个端口对应的波长为目标波长,此时OLT可以向可调波长激光器发送波长输出指令,该波长输出指令用于 指示可调波长激光器输出目标波长的测试光信号。这样可调波长激光器可以输出目标波长的测试光信号,可调波长激光器可以将第二测试光信号和偏移波长的光信号合成一束光信号,输出该一束光信号。可调波长激光器还可以接收OLT发送的第二测试光信号的关闭指令。可调波长激光器可以关闭第二测试光信号的输出,仅将偏移波长的光信号输出至ODN。这样,可以灵活的输出测试光信号,并且可以为识别ONT在ODN中连接的端口所属的分光器的级别提供数据。
在一种可能的实现方式中,输出目标波长的测试光信号之前,还包括:接收OLT发送的偏移波长的光信号的关闭指令和发出多种测试光信号的指令,关闭偏移波长的光信号的输出,按照测试光信号的预设波长顺序,输出多种测试光信号,多种测试光信号用于确定目标ONT在ODN中连接的端口。
本申请所示的方案,OLT可以向可调波长激光器发送偏移波长的光信号的关闭指令,和发出多种测试光信号的指令。可调波长激光器可以接收这两个指令,然后关闭偏移波长的光信号的输出。可调波长激光器可以按照预设的波长顺序(可以是OLT通过指令下发给可调波长激光器,也可以是可调波长激光器中预先配置有),发出多种测试光信号。这样,可调波长激光器可以仅将每一束测试光信号中的第二测试光信号进行输出。ONT的光接收组件检测到的是第二测试光信号和业务光信号的总功率。这样,可以为确定ONT在ODN中连接的端口提供数据。
第五方面,提供了一种确定光网络终端连接的端口的方法,应用于第一方面的ONT或者第三方面的系统,该方法包括:获取目标ONT对应的第一功率和第二功率的差值,其中,目标ONT在光分配网络ODN中连接的端口对应的波长为第一波长,第一波长包括的一个波长为目标波长;偏移波长为目标波长偏移目标数值获得的波长,第一功率和第二功率为目标ONT接收到的光信号包括偏移波长的光信号时的功率;对应第一功率时,与偏移波长的光信号一同输入至光分配网络ODN的光信号包括目标波长的测试光信号;对应第二功率时,输入至ODN中的光信号包括偏移波长的光信号且未包括目标波长的测试光信号,目标波长的测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,目标波长的测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值;若该差值大于或等于目标阈值,则确定目标波长对应的端口属于ODN的第一级分光器;若该差值小于目标阈值,则确定目标波长对应的端口属于ODN的第二级分光器。
本申请所示的方案,目标ONT可以获取第一功率和第二功率,在目标ONT检测到第一功率时,可调波长激光器输入至ODN中的光信号为目标波长的测试光信号和偏移波长的光信号。这样,输入至ODN中的光信号包括目标波长的测试光信号和偏移波长的光信号。在目标ONT检测到第二功率时,可调波长激光器输入至ODN中的光信号为偏移波长的光信号,这样,输入至ODN中的光信号为偏移波长的光信号。目标ONT可以确定第一功率和第二功率的差值。目标ONT可以判断第一功率和第二功率的差值与目标阈值的大小。若第一功率和第二功率的差值大于或等于目标阈值,则目标ONT可以确定目标波长对应的端口属于ODN的第一级分光器,并且可以确定第一波长中目标波长之外的另一个波长对应的端口属于ODN的第二级分光器。若差值小于目标阈值,则目标ONT可以确定目标波长对应的端口属于ODN的第二级分光器,并且可以确定第一波长中目标波长之外的另一个波长对应的端口属于ODN的第一级分光器。这是由于第一功率与第二功率的差值比较大,说明目标ONT接收到的偏移波长的光信号 的强度比较高,说明目标波长的测试光信号对偏移波长的光信号进行了放大处理,可以确定目标波长的端口属于第一级分光器。由于第一功率与第二功率的差值比较小,说明目标ONT接收到的偏移波长的光信号的强度比较低,说明目标波长的测试光信号未对偏移波长的光信号进行放大处理,可以确定目标波长的端口属于第二级分光器。
在一种可能的实现方式中,该方法还包括:获取目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,一种波长为多种波长中的任一种,多种波长为ODN的每个分光器的不同端口对应的波长;确定每个波长对应的第三功率与业务光信号的功率的差值;若第一波长对应的第三功率与业务光信号的功率的差值小于第一数值,则确定目标ONT在ODN中连接的端口为第一波长对应的端口。
本申请所示的方案,目标ONT可以获取自身接收到的光信号中包括一种波长的测试光信号时的第三功率。该一种波长为多种波长中的任一种,该多种波长为ODN的每个分光器的不同端口对应的波长。目标ONT可以计算每个波长对应的第三功率与业务光信号的功率的差值。判断每个波长对应的第三功率与业务光信号的功率的差值与第一数值的大小,若第一波长的对应的第三功率与业务光信号的功率的差值小于第一数值,则可以确定目标ONT在ODN中连接的端口为第一波长对应的端口。这样,可以确定出ONT在ODN中连接的端口。
第六方面,提供了一种确定光网络终端连接的端口的装置,该装置包括多个模块,该多个模块通过执行指令来实现上述第五方面所提供的确定光网络终端连接的端口的方法。
第七方面,提供了一种端口识别设备,所述端口识别设备包括处理器和存储器,其中:
所述存储器中存储有计算机指令;所述处理器执行所述计算机指令,以实现第五方面所述的方法。
第八方面,提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机指令,当所述计算机可读存储介质中的计算机指令被端口识别设备执行时,使得所述端口识别设备执行第五方面所述的方法。
第九方面,本申请提供了一种计算机程序产品,所述计算机程序产品包括计算机指令,当所述计算机指令被端口识别设备执行时,所述端口识别设备执行上述第五方面所述的方法。
附图说明
图1是本申请一个示例性实施例提供的光网络终端的示意图;
图2是本申请一个示例性实施例提供的业务光信号和测试光信号的透射示意图;
图3是本申请一个示例性实施例提供的光网络终端的结构示意图;
图4是本申请一个示例性实施例提供的光网络终端的结构示意图;
图5是本申请一个示例性实施例提供的光网络终端的结构示意图;
图6是本申请一个示例性实施例提供的光网络终端的结构示意图;
图7是本申请一个示例性实施例提供的光网络终端的结构示意图;
图8是本申请一个示例性实施例提供的光网络终端的结构示意图;
图9是本申请一个示例性实施例提供的光网络终端的结构示意图;
图10是本申请一个示例性实施例提供的光网络终端的结构示意图;
图11是本申请一个示例性实施例提供的光网络终端接收到的光信号的功率示意图;
图12是本申请一个示例性实施例提供的光网络终端的结构示意图;
图13是本申请一个示例性实施例提供的可调波长激光器的结构示意图;
图14是本申请一个示例性实施例提供的可调波长激光器的结构示意图;
图15是本申请一个示例性实施例提供的输出测试光信号的流程示意图;
图16是本申请一个示例性实施例提供的确定光接入网络的拓扑的系统示意图;
图17是本申请一个示例性实施例提供的光分配网络的示意图;
图18是本申请一个示例性实施例提供的确定光网络终端在光分配网络连接的端口的流程示意图;
图19是本申请一个示例性实施例提供的对偏移波长的光信号进行放大的示意图;
图20是本申请一个示例性实施例提供的确定端口识别设备的结构示意图;
图21是本申请一个示例性实施例提供的确定光网络终端连接的端口的装置的结构示意图。
图示说明
光纤接口1,          光接收组件2;
光发射组件3,        第一滤波片4;
第二滤波片5,        处理器6;
第一光接收组件21,   第二光接收组件22;
激光器10,           分束器20;
第一光调制器30,     合光器40;
第二光调制器50,     ONT100;
可调波长激光器200,  波分复用器300;
耦合器400,          ODN500。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚,下面将结合附图对本申请实施方式作进一步地详细描述。
为了便于对本申请实施例的理解,下面首先介绍所涉及到的名词的概念:
受激布里渊放大效应(即受激布里渊散射(stimulated Brillouin scattering,SBS)):受激布里渊散射起源于激光电场与分子或固体中的声波场的相互作用,也即光子与声子的相互作用,又称声子散射。受激布里渊散射指强入射激光场在介质中感应出强声波场,并被它散射的一种非线性光效应。
受激布里渊散射的产生过程是:在激光的电场作用下,通过电致伸缩效应,使介质发生周期性密度和介电常数的变化,感生声波场,而导致入射激光与声波场间发生相干散射过程。强泵浦激光场射入介质时,光波场的电致伸缩效应开始起作用,使介质内某些状态的声频振动(声子)得到极大增强,增强了的声波场又反过来增强对入射激光的散射作用,声波场、激光波场、激光的散射光波场在介质中同时存在,互相耦合。当入射激光的强度达到阈值后,使介质内声波场与散射光波场的增强作用补偿各自的损耗作用,产生感应声波场与布里渊散射光波场的受激放大或振荡效应(即受激布里渊放大效应)。由于散射光具有发散角小、线宽窄等受激发射的特性,故称为受激布里渊散射。此处需要说明的是,受激布里渊放大效应只 发生在传输方向相反的两束光信号之间。
反射光栅,用于对入射至反射光栅的光信号进行反射的光栅,每个反射光栅反射一种波长的光信号。
在本申请实施例中,提供了一种ONT,该ONT包括光纤接口1、光接收组件2、光发射组件3、第一滤波片4和第二滤波片5,第一滤波片4可以为45度的滤波片。光纤接口1与光发射组件3之间设置有第一滤波片4,光发射组件3位于第一滤波片4的透射光路上。光发射组件3用于ONT上行发送数据时,发出上行光信号。第一滤波片4用于将光发射组件3发出的上行光信号透射至光纤接口1。
光接收组件2可以通过与第一滤波片4、第二滤波片5相配合实现接收测试光信号和业务光信号(即OLT至ONT的方向的下行的业务光信号,后文中提到的业务光信号,均为下行的业务光信号),测试光信号的波长与业务光信号的波长不相同。测试光信号用于确定ONT在ODN中连接的端口、以及ONT在ODN中连接的端口所属的分光器的级别。这样,可以通过一个ONT实现测试光信号和下行的业务光信号的接收。
在一种可能的实现方式中,如图1所示,光接收组件2和第二滤波片5位于第一滤波片4的反射光路上。第一滤波片4除了用于将光发射组件3发出的上行光信号透射至光纤接口1,还可以用于将光纤接口1接收到的测试光信号和业务光信号反射至第二滤波片5。第二滤波片5可以用于将测试光信号和业务光信号透射至光接收组件2。这样,光接收组件2可以接收到测试光信号和业务光信号。光接收组件2可以检测接收到的测试光信号和业务光信号的总功率。其中,业务光信号为下行的业务光信号。这样,可以通过一个ONT实现测试光信号和业务光信号的接收。图1中仅示出了第一滤波片4为一个滤波片的情况。
在一种可能的实现方式中,在图1中,第一滤波片4可以是倾斜波片,如第一滤波片4为45度倾斜波片。第一滤波片4可以包括多个滤波片,该多个滤波片相互配合,将测试光信号和业务光信号反射至第二滤波片5,并且该多个滤波片相互配合,使得光接收组件2的引脚方向合适,进而使得ONT的体积最小。例如,第一滤波片4包括2个滤波片(滤波片A和滤波片B),且两个滤波片均为45度滤波片,滤波片A将测试光信号和业务光信号反射至水平面内垂直向下,滤波片B将滤波片A反射的测试光信号和业务光信号反射至水平向左方向,那么光接收组件2位于图1中的左侧。
在一种可能的实现方式中,在图1中,第二滤波片5包括第一面和第二面,第一面为测试光信号和业务光信号入射至第二滤波片5首次入射的面,第二面为第二滤波片5中相对第一面的背面。第一面的镀膜可以对业务光信号、测试光信号和中间光信号进行透射,第二面的镀膜可以对测试光信号和业务光信号进行透射,而阻挡中间光信号,中间光信号为业务光信号的波长和测试光信号的波长之间的波长的光信号。
在一种可能的实现方式中,在图1中,第二滤波片5可以是带通滤光片,常见的是法布里-珀罗型滤光片,具体结构为:玻璃衬底上涂一层半透明金属层,接着涂一层氧化镁各层,再涂一层半透明金属层,两金属层构成了法布里-珀罗型滤光片的两块平行板。给业务光信号留透过窗口是利用一个法布里-珀罗型滤光片,如果想要增加测试光信号的窗口,可以改变玻璃衬底上的金属层镀膜,使其覆盖了业务光信号和测试光信号的波长。然后在业务光信号和测试光信号之间通过镀膜的方式增加一个阻带(即上述提到的中间光信号),实现业务光信号的波长和测试光信号的波长的隔离。
例如,如图2所示,原来业务光信号的波长范围为λ1-λ2,改变玻璃衬底上的金属层镀膜后,覆盖业务光信号和测试光信号的波长范围为λ1-λ3(λ2<λ3),中间光信号的波长范围为λ2-λ4,且不包括λ2。图2中示出的是测试光信号的波长大于业务光信号的波长,当然也可以是测试光信号的波长小于业务光信号的波长。
在一种可能的实现方式中,在图1中,第二滤波片5可以包括两个滤波片,业务光信号首先入射至的滤波片可以对业务光信号、测试光信号和中间光信号进行透射,后入射至的滤波片可以对测试光信号和业务光信号进行透射,而阻挡中间光信号,中间光信号为业务光信号的波长和测试光信号的波长之间的波长的光信号。
在一种可能的实现方式中,如图3所示,光发射组件3位于第一滤波片4的反射光路上。光接收组件2和第二滤波片5位于第一滤波片4的透射光路上。第一滤波片4除了用于将光发射组件3发出的上行光信号反射至光纤接口1,还可以用于将光纤接口1接收到的测试光信号和业务光信号透射至第二滤波片5。第二滤波片5可以用于将测试光信号和业务光信号透射至光接收组件2。这样,光接收组件2可以接收到测试光信号和业务光信号。光接收组件2可以检测接收到的测试光信号和业务光信号的总功率。其中,业务光信号为下行的业务光信号。这样,可以通过一个ONT实现测试光信号和业务光信号的接收。
需要说明的是,对于图3中所示的ONT,第一滤波片4和第二滤波片5可以参见图1中的描述,第一滤波片4也可以包括多个滤波片。
在一种可能的实现方式中,如图4所示,光接收组件2包括第一光接收组件21和第二光接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与光发射组件3之间。第一光接收组件21位于第一滤波片4的反射光路上,第二光接收组件22位于第二滤波片5的反射光路上。第一滤波片4用于将光发射组件3发射的上行光信号传输至光纤接口1,还用于将光纤接口1接收到的测试光信号反射至第一光接收组件21。这样,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
第一滤波片4还用于将光纤接口1接收到的业务光信号透射至第二滤波片5。第二滤波片5用于将光纤接口1接收到的业务光信号反射至第二光接收组件22。这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务。
第二滤波片5还可以用于将光发射组件3发出的上行光信号透射至第一滤波片4,第一滤波片4用于将上行光信号透射至光纤接口1,实现ONT正常的上行业务。
在一种可能的实现方式中,如图5所示,光接收组件2包括第一光接收组件21和第二光接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与光发射组件3之间。第二光接收组件22位于第一滤波片4的反射光路上,第一光接收组件21位于第二滤波片5的反射光路上。第一滤波片4用于将光发射组件3发射的上行光信号传输至光纤接口1,还用于将光纤接口1接收到的业务光信号反射至第二光接收组件22。这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务。
第一滤波片4还用于将光纤接口1接收到的测试光信号透射至第二滤波片5。第二滤波片5用于将光纤接口1接收到的测试光信号反射至第一光接收组件21。这样,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
第二滤波片5还可以用于将光发射组件3发出的上行光信号透射至第一滤波片4,实现ONT正常的上行业务。
在一种可能的实现方式中,如图6所示,光接收组件2包括第一光接收组件21和第二光 接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与第二光接收组件22之间。第一光接收组件21位于第二滤波片5的反射光路上,光发射组件3位于第一滤波片4的反射光路上。第一滤波片4用于将光发射组件3发射的上行光信号通过反射传输至光纤接口1,实现ONT正常的上行业务。第一滤波片4还用于将光纤接口1接收到的测试光信号和业务光信号透射至第二滤波片5。
第二滤波片5用于将光纤接口1接收到的业务光信号透射至第二光接收组件22。第二滤波片5还用于将光纤接口1接收到的测试光信号反射至第一光接收组件21。这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
在一种可能的实现方式中,如图7所示,光接收组件2包括第一光接收组件21和第二光接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与第一光接收组件21之间。第二光接收组件22位于第二滤波片5的反射光路上,光发射组件3位于第一滤波片4的反射光路上。第一滤波片4用于将光发射组件3发射的上行光信号通过反射传输至光纤接口1,实现ONT正常的上行业务。第一滤波片4还用于将光纤接口1接收到的测试光信号和业务光信号透射至第二滤波片5。
第二滤波片5用于将光纤接口1接收到的业务光信号反射至第二光接收组件22。第二滤波片5还用于将光纤接口1接收到的测试光信号透射至第一光接收组件21。这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
在一种可能的实现方式中,如图8所示,光接收组件2包括第一光接收组件21和第二光接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与第一光接收组件21之间。第二光接收组件22位于第一滤波片4的反射光路上,光发射组件3位于第二滤波片5的反射光路上。第二滤波片5用于将光发射组件3发射的上行光信号反射至第一滤波片4,第一滤波片4用于将光发射组件3发射的上行光信号透射至光纤接口1,实现ONT正常的上行业务。第一滤波片4还用于将光纤接口1接收到的业务光信号反射至第二光接收组件22,第一滤波片4还用于将光纤接口1接收到的测试光信号透射至第二滤波片5。
第二滤波片5还用于将光纤接口1接收到的测试光信号透射至第一光接收组件21。
这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
在一种可能的实现方式中,如图9所示,光接收组件2包括第一光接收组件21和第二光接收组件22,第二滤波片5位于第一滤波片4的透射光路上,且位于第一滤波片4与第二光接收组件22之间。第一光接收组件21位于第一滤波片4的反射光路上,光发射组件3位于第二滤波片5的反射光路上。第二滤波片5用于将光发射组件3发射的上行光信号反射至第一滤波片4,第一滤波片4用于将光发射组件3发射的上行光信号透射至光纤接口1,实现ONT正常的上行业务。第一滤波片4还用于将光纤接口1接收到的测试光信号反射至第一光接收组件21,第一滤波片4还用于将光纤接口1接收到的业务光信号透射至第二滤波片5。
第二滤波片5还用于将光纤接口1接收到的业务光信号透射至第二光接收组件22。
这样,第二光接收组件22可以接收到业务光信号,进行正常的下行业务,第一光接收组件21可以接收到测试光信号,检测接收到的测试光信号的功率。
在一种可能的实现方式中,在光接收组件2包括第一光接收组件21和第二光接收组件 22的情况下,在第一光接收组件21和第二光接收组件22之前也可以添加零度滤波片,第一光接收组件21之前添加的零度滤波片用于过滤除测试光信号之外的其他光信号,第二光接收组件22之前添加的零度滤波片用于过滤除下行的业务光信号之外的其他光信号。
在一种可能的实现方式中,对应图1所示的ONT,如图10所示,ONT还包括处理器6,处理器6与光接收组件2电性连接。为了确定ONT在ODN中连接的端口,ODN中的分光器的每个端口设置有反射光栅,且每个端口设置的反射光栅所能反射的光信号的波长不相同。为ODN输入多种波长的测试光信号,多种波长由ODN的分光器的每个端口设置的反射光栅所能反射的光信号的波长组成。ONT的光接收组件2可以检测每次接收到的测试光信号和业务光信号的总功率。
处理器6可以获取预先存储的业务光信号的功率,该功率可以是在没有测试光信号输入ODN时,光接收组件2检测到的业务光信号的功率。处理器6可以将每个总功率与业务光信号的功率取差值,获得每个总功率对应的第一差值。然后处理器6可以判断每个总功率对应的第一差值与第一数值的大小,若对于某个总功率,该总功率对应的第一差值小于第一数值,可以确定该总功率所属的接收到的测试光信号的第一波长。处理器6将ONT在ODN中连接的端口为第一波长对应的端口。此处需要说明的是,第一波长对应的端口为第一波长的反射光栅所在的端口,且端口属于分光器。
在一种可能的实现方式中,如图10所示,对应图1所示的ONT,ONT还包括处理器6,处理器6与光接收组件2电性连接。为了确定ONT在ODN中连接的端口,ODN中的分光器的每个端口设置有反射光栅,且每个端口设置的反射光栅所能反射的光信号的波长不相同。为ODN输入多种波长的测试光信号,多种波长由ODN的分光器的每个端口设置的反射光栅所能反射的光信号的波长组成。ONT的光接收组件2可以检测每次接收到的测试光信号和业务光信号的总功率。
处理器6可以确定检测的多个总功率中的最大值(即最大总功率),然后计算最大值与检测到的每个总功率的第二差值,获得每个总功率对应的第二差值。处理器可以判断每个总功率对应的第二差值与第二数值的大小。处理器6确定总功率对应的第二差值大于第二数值时,接收到的测试光信号的第一波长。处理器6可以确定ONT在ODN中连接的端口为第一波长对应的端口。此处需要说明的是,第一波长对应的端口为第一波长的反射光栅所在的端口,且端口属于分光器。
此处需要说明的是,由于ODN中设置有反射光栅的端口,会对反射光栅对应的波长的光信号进行反射,所以反射光栅对应的波长的测试光信号入射至反射光栅后,会被反射回来,而不会到达ONT,所以ONT仅能检测到业务光信号的功率,进而可以确定ONT在ONT中连接在该反射光栅所在的端口。例如,如图11所示,上述多种波长为8种波长(λ1-λ8),ONT检测到的总功率在λ1和λ4处与业务光信号的功率的第一差值均小于第一数值,则可以确定ONT在ODN中连接的端口为λ1和λ4分别对应的端口。
此处还需要说明的是,在ODN中,第一级分光器的不同端口设置的反射光栅,对不同的波长的测试光信号进行反射,第二级分光器的不同端口设置的反射光栅可以对不同的波长的测试光信号进行反射,且第一级分光器的不同端口对应的波长与第二级分光器的每个分光器的不同端口对应的波长相同或不相同。例如,第一级分光器包括8个端口,8个端口对应的波长为λ1-λ8,第二级分光器的每个分光器包括8个端口,8个端口对应的波长为λ1-λ8。或者,第一级分光器包括8个端口,8个端口对应的波长为λ1-λ8,第二级分光器的每个分 光器包括8个端口,8个端口对应的波长为λ9-λ16。在第一级分光器的不同端口对应的波长与第二级分光器的每个分光器的不同端口对应的波长相同的情况下,处理器6确定出的第一波长仅包括一个波长,可以说明ONT在ODN在第一级分光器中连接的端口为该波长对应的端口,在第二级分光器中连接的端口也为该波长对应的端口。
需要说明的是,在图4至图10中,每种ONT中第一滤波片4可以由多个滤波片组成,该多个滤波片相互配合除了满足第一滤波片4的功能外,还可以使得ONT的体积最小。在每种ONT中第二滤波片5可以由多个滤波片组成,该多个滤波片相互配合除了满足第二滤波片5的功能外,还可以使得ONT的体积最小。
还需要说明的是,本申请实施例中所示意的第一滤波片4和第二滤波片5使得光信号传输时均是在水平内进行传输,在实现时,也可以通过调整第一滤波片4和第二滤波片5的部署方式,使得光信号传输沿着其他方向。
在一种可能的实现方式中,上述过程中描述ONT在ODN中连接在第一波长对应的端口,在第一级分光器的不同端口对应的波长与第二级分光器的每个分光器的不同端口对应的波长相同的情况下(如第一波长包括λ1和λ4,ONT在ODN中连接的端口为λ1和λ4分别对应的端口,但是无法确定λ1对应的端口属于ODN的第一级分光器还是第二级分光器,同样,也无法确定λ4对应的端口属于ODN的第一级分光器还是第二级分光器),本申请实施例还提供了确定ONT在ODN中连接的第一波长对应的端口所属的分光器的级别,处理为:
处理器6还可以获取光接收组件2在接收到的测试光信号包括偏移波长的光信号时检测到的功率,即第一总功率和第二总功率。其中,在检测到的功率为第一总功率时,光接收组件2接收到的测试光信号包括的偏移波长的光信号是目标波长的测试光信号和偏移波长的光信号一起输入至ODN时的光信号,在检测到的功率为第二总功率时,光接收组件2接收到的测试光信号包括的偏移波长的光信号是目标波长的测试光信号未输入至ODN时的光信号。具体的,目标波长的测试光信号会在ODN的第一级分光器的第一端口对偏移波长的光信号进行放大处理,而不在ODN的第二级分光器的第二端口对偏移波长的光信号进行放大处理,第一端口和第二端口设置的反射光栅对目标波长的测试光信号进行反射处理。目标波长为上述第一波长中的一个,例如,第一波长包括λ1和λ4,目标波长是λ1或λ4。
处理器6可以确定第一总功率与第二总功率的第三差值,判断第三差值与目标阈值的大小。若第三差值大于或等于目标阈值,则可以确定目标波长对应的端口属于ODN的第一级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第二级分光器。若第三差值小于目标阈值,则可以确定目标波长对应的端口属于ODN的第二级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第一级分光器。
这是由于目标波长的测试光信号传输至ODN的第一级分光器的第一端口后,被第一端口设置的反射光栅反射,反射后的第二测试光信号的功率大于或等于产生布里渊放大效应的阈值,能对偏移波长的光信号进行放大处理,第一端口设置的反射光栅对放大处理后的偏移波长的光信号直接透射,使得传输至ONT的偏移波长的光信号的强度比较大,导致第一总功率比较大。而由于目标波长的测试光信号传输至ODN的第二级分光器的第二端口后,虽然也被第二端口设置的反射光栅反射,但是经过第一级分光器和第二级分光器的衰减,目标波长的测试光信号在第二端口设置的反射光栅反射后强度比较低,反射后的第二测试光信号的功率小于产生布里渊放大效应的阈值,不能对偏移波长的光信号进行放大处理,使得传输至ONT的偏移波长的光信号的强度比较低,导致第一总功率比较小。第二总功率表示目标波长的测 试光信号未和偏移波长的光信号一起输入至ODN时,光接收组件2检测到的业务光信号和测试光信号的总功率,即为仅将偏移波长的光信号输入至ODN时光接收组件2检测到的业务光信号和测试光信号的总功率。所以在第一总功率与第二总功率的差值比较大时,说明该ONT连接的目标波长对应的端口属于ODN的第一级分光器,而在第一总功率与第二总功率的差值比较小时,说明该ONT连接的目标波长对应的端口属于ODN的第二级分光器。
在一种可能的实现方式中,如图12所示,对应图4的ONT,ONT还包括处理器6,处理器6与光接收组件2电性连接,当然处理器6与第一光接收组件21电性连接。为了确定ONT在ODN中连接的端口,ODN中的分光器的每个端口设置有反射光栅,且每个端口设置的反射光栅对应的波长不相同(即每个反射光栅所能反射的光信号的波长不相同)。为ODN输入多种波长的测试光信号,多种波长由ODN的分光器的每个端口设置的反射光栅对应的波长组成。ONT的第一光接收组件21可以检测每次接收到的测试光信号的功率。
处理器6可以确定第一光接收组件21接收到的测试光信号的多个功率中的最大值,然后计算最大功率与第一光接收组件21接收到的测试光信号的每个功率的第四差值。处理器判断每个功率对应的第四差值与第二数值的大小,在某个功率对应的第四差值大于第二数值时,确定该功率对应的第一光接收组件21接收到的测试光信号的第一波长。然后处理器6可以确定ONT在ODN中连接的端口为第一波长对应的端口。第一波长对应的端口即为ODN中设置有对第一波长的测试光信号进行反射的反射光栅的端口。
此处需要说明是,此处能确定出ONT在ODN中连接的端口的原因为:由于ONT接收不到哪个波长的测试光信号,说明ONT连接在设置有反射该波长的光信号的反射光栅的端口,通过这种原理即可确定出ONT在ODN中连接的端口。
在一种可能的实现方式中,在光接收组件2包括第一光接收组件21和第二光接收组件22的情况下,ONT在OND中连接第一波长对应的端口,在第一级分光器的不同端口对应的波长与第二级分光器的每个分光器的不同端口对应的波长相同的情况下,本申请实施例还提供了确定ONT在ODN中连接的第一波长对应的端口所属的分光器的级别,处理为:
处理器6还可以获取第一光接收组件21在接收到的测试光信号包括偏移波长的光信号时检测到的功率,即第一功率和第二功率。其中,在检测到的功率为第一功率时,第一光接收组件21接收到的测试光信号包括的偏移波长的光信号和目标波长的测试光信号一起输入至ODN时的光信号;在检测到的功率为第二功率时,第一光接收组件21接收到的测试光信号包括的偏移波长的光信号是未和目标波长的测试光信号一起输入至ODN时的光信号。具体的,目标波长的测试光信号会在ODN的第一级分光器的第一端口对偏移波长的光信号进行放大处理,而不在ODN的第二级分光器的第二端口对偏移波长的光信号进行放大处理,第一端口和第二端口设置的反射光栅对目标波长的测试光信号进行反射处理。目标波长为第一波长包括的波长中的一个波长。
处理器6可以确定第一功率与第二功率的第五差值,判断第五差值与目标阈值的大小。若第五差值大于或等于目标阈值,则可以确定目标波长对应的端口属于ODN的第一级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第二级分光器。若第五差值小于目标阈值,则可以确定目标波长对应的端口属于ODN的第二级分光器,并且可以确定第一波长中除目标波长之外的波长对应的端口属于ODN的第一级分光器。此处的原理与前文中描述的原理相同,此处不再赘述。
这样,通过上述ONT,不仅能够确定出ONT在ODN中连接的端口,还能确定出ONT在ODN 中连接的端口所属的分光器的级别。
本申请实施例中,如图13所示,还提供了输出测试光信号的装置,即可调波长激光器。可调波长激光器包括激光器10、分束器20、第一光调制器30和合光器40,分束器20包括第一出光口和第二出光口。激光器10可以输出多种波长的测试光信号,多种波长为ODN中分束器的端口设置的反射光栅所能反射的光信号的波长。分束器20可以位于激光器10与第一光调制器30之间,且分束器20位于激光器10的出光口,第一光调制器30位于分束器20的第一出光口。合光器40位于第一光调制器30的出光口和分束器20的第二出光口。
分束器20用于将激光器10输出的目标波长的测试光信号分为第一测试光信号和第二测试光信号,分别通过第一出光口和第二出光口输出,第一测试光信号即会输入至第一光调制器30。第一光调制器30可以对第一测试光信号的波长偏移目标数值,获得偏移波长的光信号。第二出光口输出的第二测试光信号进入合光器。
合光器40对第二测试光信号和偏移波长的光信号进行合光处理,获得一束光信号进行输出。另外,第一光调制器30在关闭输出的情况下,合光器40可以仅输出第二测试光信号,在不存在第二测试光信号的情况下,合光器40可以仅输出偏移波长的光信号。
在合光器40输出第二测试光信号和偏移波长的光信号的情况下,第二测试光信号和偏移波长的光信号进入ODN后,OND中的第一级分光器的目标波长对应的端口对第二测试光信号进行反射处理,反射后的第二测试光信号的功率大于或等于产生布里渊放大效应的阈值,可以对偏移波长的光信号进行放大处理。ODN中的第二级分光器的目标波长对应的端口对第二测试光信号进行反射处理,反射处理后的第二测试光信号由于经过第一级分光器和第二级分光器的衰减,强度较低,其功率小于产生布里渊放大效应的阈值,不会对偏移波长的光信号进行放大处理。这样,可以用于区分ONT在ODN中连接的端口属于第一级分光器还是第二级分光器。
在一种可能的实现方式中,如图14所示,可调波长激光器还包括第二光调制器50,第二光调制器50位于分束器20的第二出光口与合光器40之间,第二光调制器50可以用于调整进入第二光调制器50的第二测试光信号的功率,使得第二测试光信号的功率满足在ODN的第一级分光器的目标波长对应的端口对偏移波长的光信号进行放大处理,且在ODN中除第一分光器之外的分光器的目标波长对应的端口不对偏移波长的光信号进行放大处理(原理在上文中描述)。
在一种可能的实现方式中,第一光调制器30可以为电光调制器,第二光调制器50可以为半导体调制器。
本申请实施例中,还提供了对应图13所示的可调波长激光器中,输出测试光信号的方法。该方法的执行流程如图15所示:
步骤1501,可调波长激光器输出目标波长的测试光信号,其中,目标波长为可调波长激光器可输出的多种测试光信号中的任一测试光信号的波长。目标波长为上述第一波长包括的波长中的一个波长。
步骤1502,可调波长激光器将目标波长的测试光信号分为两束光信号,其中,两束光信号包括第一测试光信号和第二测试光信号。
在本实施中,可调波长激光器可以将目标波长的测试光信号分为两束光信号,该两束光 信号可以包括第一测试光信号和第二测试光信号。第一测试光信号和第二测试光信号的波长均为目标波长。
步骤1503,可调波长激光器对第一测试光信号进行波长偏移处理,获得偏移波长的光信号。
在本实施例中,可调波长激光器可以对第一测试光信号的目标波长偏移目标数值,获得偏移波长的光信号。例如,在反射光栅的带宽小于20GHz,此处目标数值可以为10GHz,这样,偏移波长为目标波长与10GHz对应的波长的和,或者偏移波长为目标波长与10GHz对应的波长的差。
步骤1504,可调波长激光器合成第二测试光信号和偏移波长的光信号,输出合成后的光信号,其中,第二测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,第二测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。
在本实施例中,可调波长激光器可以将第二测试光信号和/或偏移波长的光信号进行输出,即输出至ODN。
此处需要说明的是,在同时存在第二测试光信号和偏移波长的光信号时,第二测试光信号和偏移波长的光信号是合为一束光信号进行输出,OND中的第一级分光器的目标波长对应的端口对第二测试光信号进行反射处理,反射后的第二测试光信号的功率大于或等于产生布里渊放大效应的阈值,可以对偏移波长的光信号进行放大处理。ODN中的第二级分光器的目标波长对应的端口对第二测试光信号进行反射处理,反射处理后的第二测试光信号由于经过第一级分光器和第二级分光器的衰减,强度较低,其功率小于产生布里渊放大效应的阈值,不会对偏移波长的光信号进行放大处理。这样,若ONT连接的端口为第一级分光器的目标波长对应的端口,则ONT检测到的测试光信号的功率为放大处理后的偏移波长的光信号的功率,检测到的功率比较大,若ONT连接的端口为第二级分光器的目标波长对应的端口,则ONT检测到的测试光信号的功率为未放大处理后的偏移波长的光信号的功率,检测到的功率比较小,所以可以用于区分ONT在ODN中连接的端口所属的分光器的级别。
在图15的流程中,为了使第二测试光信号的功率满足在ODN的第一级分光器的目标波长对应的端口对偏移波长的光信号进行放大处理,而在ODN中除第一分光器之外的分光器的目标波长对应的端口不对偏移波长的光信号进行放大处理。可调波长激光器可以对第二测试光信号的功率进行调整,这样可调波长激光器可以将功率调整后的第二测试光信号和偏移波长的光信号合成一束光信号,输出该一束光信号至ODN。
在一种可能的实现方式中,在步骤1501之前,当前OLT知晓目标ONT(任一ONT)在ODN中连接的一个端口对应的波长为目标波长,此时OLT可以向可调波长激光器发送波长输出指令,该波长输出指令用于指示可调波长激光器输出目标波长的测试光信号。这样可调波长激光器可以输出目标波长的测试光信号,在步骤1504中,可调波长激光器可以将第二测试光信号和偏移波长的光信号,输出至ODN。这样,在图1中,ONT的光接收组件2检测到的是第一总功率。在图4中,ONT的第一光接收组件21检测到的是第一功率。
另外,可调波长激光器在将第二测试光信号和偏移波长的光信号,进行输出后,可调波长激光器还可以接收第二测试光信号的关闭指令。可调波长激光器可以关闭第二测试光信号的输出,仅将偏移波长的光信号输出至ODN。这样,在图1中,ONT的光接收组件2检测到的是第二总功率。在图4中,ONT的第一光接收组件21检测到的是第二功率。
这样,ONT可以基于第一总功率和第二总功率,确定目标ONT在ODN中连接的目标波长对应的端口属于第一级分光器或者第二级分光器。或者,ONT可以基于第一功率和第二功率,确定目标ONT在ODN中连接的目标波长对应的端口属于第一级分光器或者第二级分光器(此过程在前文中已进行描述,此处不再赘述)。
在一种可能的实现方式中,检测目标ONT在ODN中连接的端口的处理为:
可调波长激光器接收OLT发送的偏移波长的光信号所在的输出端口的关闭指令,关闭偏移波长的光信号所在输出端口的输出,按照测试光信号的预设波长顺序,输出多种测试光信号,多种测试光信号用于确定目标ONT在ODN中连接的端口。
在本实施例中,OLT可以向可调波长激光器发送偏移波长的光信号的关闭指令,和发出多种测试光信号的指令。可调波长激光器可以接收这两个指令,然后关闭偏移波长的光信号的输出(具体可以是关闭第一光调制器30的输出)。
可调波长激光器可以按照预设的波长顺序(可以是OLT通过指令下发给可调波长激光器,也可以是可调波长激光器中预先配置有),发出多种测试光信号。这样,可调波长激光器可以仅将每种测试光信号中的第二测试光信号进行输出。在图1中,ONT的光接收组件2检测到的是第二测试光信号和业务光信号的总功率,在图4中,ONT的第一光接收组件21检测到的是第二测试光信号的功率。这样,ONT可以基于该总功率或者该功率,确定出ONT在ODN中连接的端口(此过程在前文中已进行描述,此处不再赘述)。
本申请实施例中,还提供了一种确定光接入网的拓扑的系统,该系统包括ONT100、可调波长激光器200、以及波分复用器300或者耦合器400;具体的,可调波长激光器200见图13和图14所示的可调波长激光器,ONT100见图1、图3至图10任一所示的ONT。波分复用器300与耦合器400可以用于将业务光信号和测试光信号合成一束光信号,此处业务光信号指下行的业务光信号,即OLT至ONT100的业务光信号。
在一种可能的实现方式中,如图16所示,确定光接入网的拓扑的系统还包括ODN500,ODN500与波分复用器300或耦合器400连接,ODN500与ONT100连接。
ODN500包括第一级分光器和第二级分光器,第一级分光器和第二级分光器的各端口设置有反射光栅,反射光栅所能反射的光信号的波长与业务光信号的波长不相同。
具体的,第一级分光器的各端口与第二级分光器的各端口设置相同波长的反射光栅,对于第一级分光器和第二级分光器中任一分光器,分光器的各端口采用不同波长的反射光栅。例如,如图17所示,ODN500包括第一级分光器和第二级分光器,第一级分光器为1*8的分光器,第二级分光器包括8个1*8的分光器,第一级分光器的不同端口分别设置的反射光栅所能反射的光信号的波长分别为λ1-λ8,第二级分光器中任一分光器的不同端口分别设置的反射光栅所能反射的光信号的波长分别为λ1-λ8。在图17中第二级分光器仅示出一个分光器。
或者,第一级分光器的各端口与第二级分光器每个分光器的各端口设置不同波长的反射光栅,第二级分光器的各个分光器的各端口设置相同波长的反射光栅。例如,第一级分光器为1*8的分光器,第二级分光器包括8个1*8的分光器,第一级分光器的不同端口分别设置的反射光栅所能反射的光信号的波长分别为λ1-λ8,第二级分光器中任一分光器的不同端口分别设置的反射光栅所能反射的光信号的波长分别为λ9-λ16。
在一种可能的实现方式中,可调波长激光器200可以设置在OLT中。
在本实施例中,确定光接入网的拓扑的系统中的可调波长激光器200、ONT100可以配合,确定ONT100在ODN500中连接的端口(可参见图15的流程和图18所示的流程),即确定出光接入网络的拓扑。
本申请实施例中,还提供了一种确定ONT连接的端口的方法,该方法的执行主体可以是端口识别设备,该端口识别设备可以为ONT,也可以是OLT,当然也可以是其他终端或者服务器等,本申请实施例不做限定,如下以端口识别设备为ONT为例进行说明:
如图18所示,该方法的执行流程可以如下:
步骤1801,获取目标ONT对应的第一功率和第二功率的差值,其中,目标ONT在光分配网络ODN中连接的一个端口对应的波长为目标波长;偏移波长为目标波长偏移目标数值获得的波长,第一功率和第二功率为目标ONT接收到的光信号包括偏移波长的光信号时的功率;对应第一功率时,与偏移波长的光信号一同输入至光分配网络ODN的光信号包括目标波长的测试光信号;对应第二功率时,输入至ODN中的光信号包括偏移波长的光信号且未包括目标波长的测试光信号,目标波长的测试光信号在ODN的第一级分光器的目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,目标波长的测试光信号在ODN的第二级分光器的目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。
其中,目标ONT为任一ONT,目标ONT在光分配网络ODN中连接的一个端口对应的波长为目标波长(即上述提到的第一波长包括的一个波长),偏移波长为目标波长偏移目标数值获得的波长。
在本实施例中,目标ONT可以获取第一功率和第二功率,第一功率为目标ONT接收到的光信号中包括偏移波长的光信号时的功率,在目标ONT检测到第一功率时,可调波长激光器输入至ODN中的光信号为目标波长的测试光信号和偏移波长的光信号。这样,输入至ODN中的光信号包括目标波长的测试光信号和偏移波长的光信号。
第二功率为目标ONT接收到的光信号中包括偏移波长的光信号时的功率,在目标ONT检测到第二功率时,可调波长激光器输入至ODN中的光信号为偏移波长的光信号,这样,输入至ODN中的光信号为偏移波长的光信号。
目标ONT可以确定第一功率和第二功率的差值。
此处需要说明的是,目标波长的测试光信号在ODN的第一级分光器的目标波长对应的端口对偏移波长的光信号进行放大处理,且在ODN的第二级分光器的目标波长对应的端口未对偏移波长的光信号进行放大处理。
此处还需要说明的是,OLT可以通知ONT本次发出的光信号的波长,并告知本次是否输入目标波长的测试光信号。这样,ONT可以知晓检测到的哪个功率是第一功率,哪个功率是第二功率,后续还可以确定出目标ONT在ODN中连接的目标波长的端口属于第一级分光器还是第二级分光器。
步骤1802,若差值大于或等于目标阈值,则确定目标波长对应的端口属于ODN的第一级分光器;若差值小于目标阈值,则确定目标波长对应的端口属于ODN的第二级分光器。
在本实施例中,目标ONT可以判断第一功率和第二功率的差值与目标阈值的大小。若第一功率和第二功率的差值大于或等于目标阈值,则目标ONT可以确定目标波长对应的端口属于ODN的第一级分光器,并且可以确定第一波长中目标波长之外的另一个波长对应的端口属于ODN的第二级分光器。若差值小于目标阈值,则目标ONT可以确定目标波长对应的端口属 于ODN的第二级分光器,并且可以确定第一波长中目标波长之外的另一个波长对应的端口属于ODN的第一级分光器。这是由于第一功率与第二功率的差值比较大,说明目标ONT接收到的偏移波长的光信号的强度比较高,说明目标波长的测试光信号对偏移波长的光信号进行了放大处理,可以确定目标波长的端口属于第一级分光器。由于第一功率与第二功率的差值比较小,说明目标ONT接收到的偏移波长的光信号的强度比较低,说明目标波长的测试光信号未对偏移波长的光信号进行放大处理,可以确定目标波长的端口属于第二级分光器。
此处需要说明的是,若图18对应图1中的目标ONT,则目标ONT对应的第一功率和第二功率为偏移波长的光信号与业务光信号的总功率,即第一功率为上文中的第一总功率,第二功率为上文中的第二总功率,若图18对应图4至图9中的目标ONT,则目标ONT对应的第一功率和第二功率为偏移波长的光信号的功率,即第一功率为上文中的第一功率,第二功率为上文中的第二功率。
在一种可能的实现方式中,对应图1中的目标ONT,本申请实施例还提供了确定目标ONT在ODN中连接的端口的方法,处理可以如下:
获取目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,一种波长为多种波长中的任一种,多种波长为ODN的每个分光器的不同端口对应的波长,确定每个波长对应的第三功率与业务光信号的功率的差值,若第一波长对应的第三功率与业务光信号的功率的差值小于第一数值,则确定目标ONT在ODN中连接的端口为第一波长对应的端口。
在本实施例中,目标ONT可以获取自身接收到的光信号中包括一种波长的测试光信号时的第三功率。该一种波长为多种波长中的任一种,该多种波长为ODN的每个分光器的不同端口对应的波长。例如,每个分光器包括8个端口,该8个端口分别对应λ1-λ8,这样,目标ONT可以获取到8个第三功率。
目标ONT可以计算每个波长对应的第三功率与业务光信号的功率的差值。判断每个波长对应的第三功率与业务光信号的功率的差值与第一数值的大小,若第一波长的对应的第三功率与业务光信号的功率的差值小于第一数值,则可以确定目标ONT在ODN中连接的端口为第一波长对应的端口。这是由于第一波长对应的第三功率比较小,说明第一波长的光信号被反射,未进入到目标ONT,那么目标ONT在ODN中连接的端口为第一波长对应的端口。
在一种可能的实现方式中,对应图1,本申请实施例还提供了确定目标ONT在ODN中连接的端口的方法,处理可以如下:
获取目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,一种波长为多种波长中的任一种,多种波长为ODN的每个分光器的不同端口对应的波长;确定最大功率与每个波长对应的第三功率的差值;若最大功率与目标波长对应的第三功率的差值大于第二数值,则确定目标ONT在ODN中连接的端口为目标波长对应的端口。
在本实施例中,目标ONT可以获取自身接收到的光信号中包括一种波长的测试光信号时的第三功率。该一种波长为多种波长中的任一种,该多种波长为ODN的每个分光器的不同端口对应的波长。例如,每个分光器包括8个端口,该8个端口分别对应λ1-λ8,这样,目标ONT可以获取到8个第三功率。
目标ONT可以确定多个第三功率中的最大功率,然后分别计算最大功率与每个波长对应的第三功率的差值,在最大功率与目标波长对应的第三功率的差值大于第二数值的情况下,目标ONT可以确定自身在ODN中连接的端口为目标波长对应的端口。例如,目标ONT连接在ODN的λ1对应的端口和λ8对应的端口,则可以确定最大功率与λ1对应的第三功率的差值 大于第二数值,且最大功率与λ8对应的第三功率的差值大于第二数值。
此处需要说明的是,图18所示的流程中是以ONT为执行主体确定目标ONT在ODN中连接的端口所属的分光器的级别,当然本申请实施例中也可以以OLT为执行主体,确定目标ONT在ODN中连接的端口所属的分光器的级别,确定目标ONT在ODN中连接的端口与ONT中的流程相同,只不过,目标ONT还需要向OLT发送目标ONT检测到的功率。目标ONT可以向OLT发送ONT检测到的第一功率和第二功率,OLT接收到第一功率和第二功率后,可以确定第一功率和第二功率的差值,后续处理见ONT为执行主体的处理。具体的,目标OLT可以控制可调波长激光器发出目标波长的测试光信号,并给目标ONT下发通知发送检测到的第一功率,目标OLT还可以控制可调波长激光器发出目标波长的测试光信号,并停止输出目标波长的测试光信号,仅输出偏移波长的光信号,并给目标ONT下发通知,发送检测到的第二功率。目标ONT可以将检测到的第一功率发送至OLT,并且目标ONT还可以将检测到的第二功率发送至OLT,OLT确定第一功率和第二功率的接收先后顺序,将先接收到的功率作为第一功率,将后接收到的功率作为第二功率。当然,目标ONT可以将中间处理数据发送至OLT。例如,目标ONT向OLT发送第一功率与第二功率的差值。
上述以ONT为执行主体确定目标ONT在ODN中连接的端口,当然本申请实施例中也可以以OLT为执行主体,确定目标ONT在ODN中连接的端口。ONT也可以将每个波长对应的第三功率发送至OLT,OLT基于每个波长对应的第三功率,确定目标ONT在ODN中连接的端口。或者目标ONT也可以将中间处理数据发送至OLT,中间处理数据也可以包括多个波长对应的第三功率的最大功率与每个波长对应的第三功率的差值,OLT基于每个差值,确定目标ONT在ODN中连接的端口。具体的,OLT控制可调波长激光器按照预设的波长顺序发出多种波长的测试光信号,并且OLT向目标ONT下发通知,指示目标ONT向OLT发送检测到的多个功率。目标ONT可以按照检测到功率的顺序,发送至OLT。这样,OLT可以基于目标ONT发送功率的先后顺序,依次将多种波长与目标ONT发送的功率对应,即获得每个波长对应的第三功率。
需要说明的是,在上述描述中,目标波长的测试光信号对偏移波长的光信号进行放大的原理为受激布里渊放大效应,目标波长的测试光信号作为泵浦光。如图19所示,还提供了目标波长的测试光信号在第一级分光器的目标波长对应的端口对偏移波长的光信号进行放大的示意图。
另外,如图20所示,上述端口识别设备包括存储器2001和处理器2002。存储器2001可以是只读存储器(Read-Only Memory,ROM)、静态存储设备、动态存储设备等。存储器2001可以存储计算机指令,当存储器2001中存储的计算机指令被处理器2002执行时,处理器2002用于执行故障定位的方法。存储器还可以存储数据。处理器2002可以采用通用的中央处理器(Central Processing Unit,CPU),应用ASIC,图形处理器(Graphics Processing Unit,GPU)或其任意组合。处理器2002可以包括一个或多个芯片。
图21是本申请实施例提供的确定光网络终端连接的端口的装置的结构图。该装置可以通过软件、硬件或者两者的结合实现成为装置中的部分或者全部,本申请实施例提供的装置可以实现本申请实施例18所述的流程,该装置包括:获取模块2110和确定模块2120,其中:
获取模块2110,用于获取目标ONT对应的第一功率和第二功率的差值,其中,所述目标ONT在光分配网络ODN中连接的端口对应的波长为第一波长,所述第一波长包括的一个波长为目标波长;偏移波长为所述目标波长偏移目标数值获得的波长,所述第一功率和所述第二 功率为所述目标ONT接收到的光信号包括所述偏移波长的光信号时的功率;对应所述第一功率时,输入至所述ODN的光信号包括所述目标波长的测试光信号和所述偏移波长的光信号;对应所述第二功率时,输入至所述ODN中的光信号包括所述偏移波长的光信号且未包括所述目标波长的测试光信号,所述目标波长的测试光信号在ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述目标波长的测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值,具体可以用于实现步骤1801的获取功能以及步骤1801包含的隐含步骤;
确定模块2120,用于若所述差值大于或等于目标阈值,则确定所述目标波长对应的端口属于所述ODN的第一级分光器;若所述差值小于所述目标阈值,则确定所述目标波长对应的端口属于所述ODN的第二级分光器,具体可以用于实现步骤1802的确定功能以及步骤1802包含的隐含步骤。
在一种可能的实现方式中,所述获取模块2110,还用于获取所述目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,所述一种波长为多种波长中的任一种,所述多种波长为所述ODN的每个分光器的不同端口对应的波长;
所述确定模块2120,还用于确定每个波长对应的第三功率与业务光信号的功率的差值;若第一波长对应的第三功率与业务光信号的功率的差值小于第一数值,则确定所述目标ONT在所述ODN中连接的端口为所述第一波长对应的端口。
上述本申请实施例中对模块的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时也可以有另外的划分方式,另外,在本申请各个实施例中的各功能模块可以集成在一个处理器中,也可以是单独物理存在,也可以两个或两个以上模块集成为一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现,当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令,在OLT上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输。所述计算机可读存储介质可以是OLT够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(如软盘、硬盘和磁带等),也可以是光介质(如数字视盘(Digital Video Disk,DVD)等),或者半导体介质(如固态硬盘等)。

Claims (21)

  1. 一种光网络终端ONT,其特征在于,所述ONT包括光纤接口、光接收组件、光发射组件、第一滤波片和第二滤波片;
    所述光纤接口与所述光发射组件之间设置有所述第一滤波片,且所述光发射组件位于所述第一滤波片的透射光路上,所述第一滤波片用于将所述光发射组件发出的上行光信号透射至所述光纤接口;
    所述光接收组件通过与所述第一滤波片、所述第二滤波片配合实现接收测试光信号和业务光信号,所述测试光信号的波长与所述业务光信号的波长不相同。
  2. 根据权利要求1所述的ONT,其特征在于,所述光接收组件和所述第二滤波片位于所述第一滤波片的反射光路上;
    所述第一滤波片还用于将所述光纤接口接收到的所述测试光信号和所述业务光信号反射至所述第二滤波片;
    所述第二滤波片用于将所述测试光信号和所述业务光信号透射至所述光接收组件。
  3. 根据权利要求1所述的ONT,其特征在于,所述光接收组件包括第一光接收组件和第二光接收组件;
    所述第二滤波片位于所述第一滤波片的透射光路上,且位于所述第一滤波片与所述光发射组件之间;
    所述第一光接收组件位于所述第一滤波片的反射光路上;
    所述第二光接收组件位于所述第二滤波片的反射光路上;
    所述第一滤波片还用于将所述光纤接口接收到的所述测试光信号反射至所述第一光接收组件,将所述光纤接口接收到的所述业务光信号透射至所述第二滤波片;
    所述第二滤波片用于将所述光纤接口接收到的所述业务光信号反射至所述第二光接收组件,所述第二滤波片还用于将所述光发射组件发出的上行光信号透射至所述第一滤波片。
  4. 根据权利要求1所述的ONT,其特征在于,所述光接收组件包括第一光接收组件和第二光接收组件;
    所述第二滤波片位于所述第一滤波片的透射光路上,且位于所述第一滤波片与所述光发射组件之间;
    所述第二光接收组件位于所述第一滤波片的反射光路上;
    所述第一光接收组件位于所述第二滤波片的反射光路上;
    所述第一滤波片还用于将所述光纤接口接收到的所述业务光信号反射至所述第二光接收组件,将所述光纤接口接收到的所述测试光信号透射至所述第二滤波片;
    所述第二滤波片用于将所述光纤接口接收到的所述测试光信号反射至所述第一光接收组件,所述第二滤波片还用于将所述光发射组件发出的上行光信号透射至所述第一滤波片。
  5. 根据权利要求2所述的ONT,其特征在于,所述ONT还包括处理器,所述处理器与所述光接收组件电性连接;
    所述处理器用于确定接收到的所述测试光信号和所述业务光信号的每个总功率与所述业务光信号的功率的第一差值,确定所述第一差值小于第一数值时所述接收到的所述测试光信号的第一波长,确定所述ONT连接的光分配网络ODN的端口为所述第一波长对应的端口;或者,
    所述处理器用于确定最大总功率与接收到的所述测试光信号和所述业务光信号的每个总功率的第二差值,确定所述第二差值大于第二数值时所述接收到的所述测试光信号的第一波长;确定所述ONT连接的ODN的端口为所述第一波长对应的端口,所述最大总功率为所述光接收组件接收到的所述测试光信号和所述业务光信号的多个总功率中的最大值。
  6. 根据权利要求5所述的ONT,其特征在于,所述处理器还用于确定第一总功率与第二总功率的第三差值,所述第一总功率和所述第二总功率为所述光接收组件接收到的测试光信号包括偏移波长的光信号时的功率;对应所述第一总功率时,输入至所述ODN的光信号包括目标波长的测试光信号和所述偏移波长的光信号;对应所述第二总功率时,输入至所述ODN中的光信号包括所述偏移波长的光信号且未包括所述目标波长的测试光信号;所述偏移波长为所述目标波长偏移目标数值获得的波长,所述目标波长的测试光信号在ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述目标波长的测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值,在所述第一波长包括多个波长的情况下,所述目标波长为所述第一波长中的一个波长;
    若所述第三差值大于或等于目标阈值,则确定所述目标波长对应的端口属于所述ODN的第一级分光器;若所述第三差值小于所述目标阈值,则确定设置有所述目标波长对应的端口属于所述ODN的第二级分光器。
  7. 根据权利要求3所述的ONT,其特征在于,所述ONT还包括处理器,所述处理器与所述第一光接收组件电性连接;
    所述处理器用于确定最大功率与所述第一光接收组件接收到的所述测试光信号的每个功率的第四差值,确定所述第四差值大于第二数值时,所述第一光接收组件接收到的所述测试光信号的第一波长,确定所述ONT连接的ODN的端口为所述第一波长对应的端口,所述最大功率为所述第一光接收组件接收到的所述测试光信号的多个功率中的最大值。
  8. 一种可调波长激光器,其特征在于,所述可调波长激光器包括激光器、分束器、第一光调制器和合光器,所述分束器包括第一出光口和第二出光口;
    所述激光器用于输出多种波长的测试光信号;
    所述分束器位于所述激光器与所述第一光调制器之间,且所述分束器位于所述激光器的出光口,所述第一光调制器位于所述分束器的第一出光口;
    所述分束器用于将进入所述分束器的目标波长的测试光信号分为第一测试光信号和第二测试光信号,分别通过所述第一出光口和所述第二出光口输出,其中,所述目标波长属于所述多种波长;
    所述合光器位于所述第一光调制器的出光口和所述分束器的第二出光口;
    所述第一光调制器用于将所述第一测试光信号的波长偏移目标数值,获得偏移波长的光信号,所述合光器用于合成所述第二测试光信号和所述偏移波长的光信号,输出合成后的光信号;
    其中,所述第二测试光信号在光分配网络ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述第二测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。
  9. 根据权利要求8所述的可调波长激光器,其特征在于,所述可调波长激光器还包括第二光调制器;
    所述第二光调制器位于所述分束器的第二出光口与所述合光器之间;
    所述第二光调制器用于调整进入所述第二光调制器的所述第二测试光信号的功率。
  10. 一种确定光接入网的拓扑的系统,其特征在于,所述系统包括可调波长激光器、光网络终端ONT,以及波分复用器或者耦合器,其中:
    所述可调波长激光器为权利要求8或9所述的可调波长激光器;
    所述ONT为权利要求1至7任一所述的ONT;
    所述波分复用器或者耦合器用于将业务光信号和测试光信号合成一束光信号。
  11. 根据权利要求10所述的系统,其特征在于,所述系统还包括光分配网络ODN;
    所述ODN与所述波分复用器或所述耦合器连接,所述ODN与所述ONT连接;
    所述ODN包括第一级分光器和第二级分光器,所述第一级分光器和所述第二级分光器的各端口设置有反射光栅,所述反射光栅所能反射的光信号的波长与业务光信号的波长不相同。
  12. 根据权利要求11所述的系统,其特征在于,所述第一级分光器的各端口与所述第二级分光器的每个分光器的各端口设置相同波长的反射光栅;
    对于所述第一级分光器和所述第二级分光器中任一分光器,所述分光器的各端口采用不同波长的反射光栅。
  13. 根据权利要求10至12任一所述的系统,其特征在于,所述可调波长激光器设置在光线路终端OLT中。
  14. 一种输出测试光信号的方法,其特征在于,应用于权利要求8或9所述的可调波长激光器;所述方法包括:
    输出目标波长的测试光信号,其中,所述目标波长属于所述可调波长激光器可输出的多种测试光信号的波长;
    将所述目标波长的测试光信号分为两束光信号,其中,所述两束光信号包括第一测试光信号和第二测试光信号;
    对所述第一测试光信号进行波长偏移处理,获得偏移波长的光信号;
    合成所述第二测试光信号和所述偏移波长的光信号,输出合成后的光信号,其中,所述第二测试光信号在光分配网络ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述第二测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值。
  15. 根据权利要求14所述的方法,其特征在于,所述方法还包括:
    对所述第二测试光信号的功率进行调整;
    所述合成所述第二测试光信号和所述偏移波长的光信号,包括:
    合成所述偏移波长的光信号和调整功率后的第二测试光信号。
  16. 根据权利要求14或15所述的方法,其特征在于,所述目标波长为目标光网络终端ONT在光分配网络ODN中连接的端口对应的波长;所述目标波长的测试光信号用于测试所述目标ONT在所述ODN中连接的端口所属的分光器的级别,所述目标波长为所述目标ONT在所述ODN中连接的端口对应的波长中的一个波长;
    所述合成所述第二测试光信号和所述偏移波长的光信号之前,还包括:
    接收光线路终端OLT发送的波长输出指令,其中,所述波长输出指令用于指示输出所述目标波长的测试光信号;
    所述方法还包括:
    接收所述OLT发送的所述第二测试光信号的关闭指令;
    停止输出所述第二测试光信号的输出,并输出所述偏移波长的光信号。
  17. 根据权利要求14至16任一所述的方法,其特征在于,所述输出目标波长的测试光信号之前,还包括:
    接收OLT发送的所述偏移波长的光信号的关闭指令和发出所述多种测试光信号的指令;
    关闭所述偏移波长的光信号的输出;
    按照测试光信号的预设波长顺序,输出所述多种测试光信号,所述多种测试光信号用于确定目标ONT在ODN中连接的端口。
  18. 一种确定光网络终端ONT连接的端口的方法,其特征在于,应用于权利要求1至7任一所述的ONT或者权利要求10至13任一所述的系统,所述方法包括:
    获取目标ONT对应的第一功率和第二功率的差值,其中,所述目标ONT在光分配网络ODN中连接的端口对应的波长为第一波长,所述第一波长包括的一个波长为目标波长;偏移波长为所述目标波长偏移目标数值获得的波长,所述第一功率和所述第二功率为所述目标ONT接收到的光信号包括所述偏移波长的光信号时的功率;对应所述第一功率时,输入至所述ODN的光信号包括所述目标波长的测试光信号和所述偏移波长的光信号;对应所述第二功率时,输入至所述ODN中的光信号包括所述偏移波长的光信号且未包括所述目标波长的测试光信号,所述目标波长的测试光信号在ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述目标波长的测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效应的阈值;
    若所述差值大于或等于目标阈值,则确定所述目标波长对应的端口属于所述ODN的第一级分光器;若所述差值小于所述目标阈值,则确定所述目标波长对应的端口属于所述ODN的第二级分光器。
  19. 根据权利要求18所述的方法,其特征在于,所述方法还包括:
    获取所述目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,所述一种波长为多种波长中的任一种,所述多种波长为所述ODN的每个分光器的不同端口对应的波长;
    确定每个波长对应的第三功率与业务光信号的功率的差值;
    若第一波长对应的第三功率与业务光信号的功率的差值小于第一数值,则确定所述目标ONT在所述ODN中连接的端口为所述第一波长对应的端口。
  20. 一种确定光网络终端ONT连接的端口的装置,其特征在于,应用于权利要求1至7任一所述的ONT或者权利要求10至13任一所述的系统,所述装置包括:
    获取模块,用于获取目标ONT对应的第一功率和第二功率的差值,其中,所述目标ONT在光分配网络ODN中连接的端口对应的波长为第一波长,所述第一波长包括的一个波长为目标波长;偏移波长为所述目标波长偏移目标数值获得的波长,所述第一功率和所述第二功率为所述目标ONT接收到的光信号包括所述偏移波长的光信号时的功率;对应所述第一功率时,输入至所述ODN的光信号包括所述目标波长的测试光信号和所述偏移波长的光信号;对应所述第二功率时,输入至所述ODN中的光信号包括所述偏移波长的光信号且未包括所述目标波长的测试光信号,所述目标波长的测试光信号在ODN的第一级分光器的所述目标波长对应的端口被反射后的功率大于或等于产生布里渊放大效应的阈值,所述目标波长的测试光信号在所述ODN的第二级分光器的所述目标波长对应的端口被反射后的功率小于产生布里渊放大效 应的阈值;
    确定模块,用于若所述差值大于或等于目标阈值,则确定所述目标波长对应的端口属于所述ODN的第一级分光器;若所述差值小于所述目标阈值,则确定所述目标波长对应的端口属于所述ODN的第二级分光器。
  21. 根据权利要求20所述的装置,其特征在于,所述获取模块,还用于获取所述目标ONT接收到的光信号中包括一种波长的测试光信号时的第三功率,所述一种波长为多种波长中的任一种,所述多种波长为所述ODN的每个分光器的不同端口对应的波长;
    所述确定模块,还用于确定每个波长对应的第三功率与业务光信号的功率的差值;若第一波长对应的第三功率与业务光信号的功率的差值小于第一数值,则确定所述目标ONT在所述ODN中连接的端口为所述第一波长对应的端口。
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