WO2020168833A1 - Procédé et dispositif de surveillance de fibre optique - Google Patents

Procédé et dispositif de surveillance de fibre optique Download PDF

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Publication number
WO2020168833A1
WO2020168833A1 PCT/CN2019/130587 CN2019130587W WO2020168833A1 WO 2020168833 A1 WO2020168833 A1 WO 2020168833A1 CN 2019130587 W CN2019130587 W CN 2019130587W WO 2020168833 A1 WO2020168833 A1 WO 2020168833A1
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WIPO (PCT)
Prior art keywords
otdr
optical fiber
measurement data
point
data
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PCT/CN2019/130587
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English (en)
Chinese (zh)
Inventor
张明超
刘建国
朱晓宇
康杰
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中兴通讯股份有限公司
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Publication of WO2020168833A1 publication Critical patent/WO2020168833A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071—Arrangements 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]

Definitions

  • the embodiments of the present disclosure relate to, but are not limited to, optical fiber monitoring technology.
  • Optical Time Domain Reflectometer is a commonly used instrument for measuring optical fiber parameters. It can measure fiber length, attenuation, and event points (bends, connectors, break points, and fusion points) in the fiber.
  • the working principle of OTDR is to emit light pulse signals into the optical fiber, detect the backscattered and reflected optical power, and calculate the attenuation and reflection of different lengths of the optical fiber according to the intensity and time sequence of the reflected light. At the same time, it can calculate the total optical fiber Attenuation and length.
  • a dual-ended OTDR solution has been proposed in related technologies, that is, OTDR devices are installed at both ends of the optical fiber to increase the effective detection distance of the OTDR to the optical fiber.
  • the above-mentioned dual-ended OTDR solution can only increase the OTDR pair The effective detection distance of the optical fiber, but the total length of the optical fiber cannot be known, and thus the measurement curve of the optical fiber attenuation cannot be accurately and uniformly presented.
  • the embodiment of the present disclosure provides an optical fiber monitoring method.
  • a first OTDR and a second OTDR are respectively provided at both ends of the optical fiber, and a light reflecting device is provided at the opposite end of each OTDR on the optical fiber.
  • the method includes: After the first OTDR and the second OTDR are used to respectively emit the detection light signal, the measurement data of the first OTDR and the measurement data of the second OTDR are respectively obtained; and the measurement data of the first OTDR and the second OTDR Two OTDR measurement data are combined and processed to obtain unified optical fiber measurement data.
  • the embodiment of the present disclosure also provides an optical fiber monitoring device, which includes: a controller, a first OTDR and a second OTDR respectively provided at both ends of the optical fiber, and an optical fiber monitoring device provided at the opposite end of each OTDR.
  • a reflection device wherein the controller is configured to obtain the measurement data of the first OTDR and the measurement data of the second OTDR after the first OTDR and the second OTDR respectively emit the detection light signal;
  • the measurement data of the second OTDR and the measurement data of the second OTDR are combined to obtain unified optical fiber measurement data.
  • Figure 1 is a schematic diagram of measuring optical fiber parameters using single-ended OTDR in related technologies
  • 2A and 2B are schematic diagrams of OTDR measurement data represented by power curves in related technologies
  • Figure 3 is a schematic diagram of measuring optical fiber parameters using a double-ended OTDR solution in related technologies
  • Fig. 4 is a schematic diagram of measurement curves of optical fiber attenuation respectively presented by adopting a double-ended OTDR scheme in related technologies
  • FIG. 5 is a schematic diagram of measuring optical fiber parameters using a single-ended OTDR according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of measuring optical fiber parameters using a double-ended OTDR solution according to an embodiment of the present disclosure
  • Fig. 7 is a flowchart of an optical fiber monitoring method according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram of a power curve obtained by using a single-ended OTDR according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a power curve obtained by using a dual-ended OTDR solution according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of the power curve of OTDR1 and the power curve of OTDR2 displayed in the same coordinate system according to an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram after splicing the power curve shown in FIG. 10 according to an embodiment of the present disclosure
  • FIG. 12 is a schematic diagram of a unified optical fiber test curve shown in a double-ended OTDR solution according to an embodiment of the present disclosure
  • FIG. 13 is a schematic diagram of the power curve of OTDR1 and the power curve of OTDR2 displayed in the same coordinate system when an event point exists in the optical fiber according to an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of a unified optical fiber test curve shown in a double-ended OTDR solution according to an embodiment of the present disclosure
  • Fig. 15 is a schematic diagram of a structure for acquiring measurement data of two OTDRs according to an embodiment of the present disclosure
  • FIG. 16 is a schematic diagram of another structure for obtaining measurement data of two OTDRs according to an embodiment of the present disclosure.
  • Fig. 17 is a schematic diagram of circuit connections involved in an optical fiber monitoring device according to an embodiment of the present disclosure.
  • Figure 1 is a schematic diagram of using a single-ended OTDR to measure optical fiber parameters in related technologies.
  • the optical signals from service wavelength 1 to service wavelength n are selected by the data selector (MUX) and output.
  • the optical signal output by the MUX is processed by the optical amplifier and then output to the first port of the multiplexer WDM.
  • n represents a natural number greater than or equal to 1.
  • the probe light pulse sent by the OTDR is sent to port 1 of the three-port circulator or coupler D, and port 3 of the three-port circulator or coupler D is used to receive the return signal (for example, reflected signal, scattered signal) Etc.), port 2 of the three-port circulator or coupler D is used to connect the second port of the WDM multiplexer.
  • the third port of WDM is connected to the fiber under test.
  • WDM can perform wavelength division multiplexing processing on the optical signal sent by the optical amplifier and the optical signal sent by the 3-port circulator or coupler D, and then output to the optical fiber under test.
  • WDM is a multiplexer of OTDR detection light and service light.
  • OTDR One of the key indicators of OTDR is dynamic range, which refers to the maximum optical fiber attenuation that can be accurately measured.
  • the unit is dB.
  • OTDR measurement data can be represented by a power curve.
  • 2A and 2B are schematic diagrams of OTDR measurement data represented by power curves in the related art.
  • the horizontal axis represents distance and the vertical axis represents power. From FIG. 2A, it can be determined that the distance interval corresponding to the dynamic range (Dynamic Range) is determined. Within the distance interval corresponding to the dynamic range, the power curve is above the dotted line in FIG. 2A, and within the distance interval corresponding to the dynamic range, the power curve is below the dotted line in FIG. 2A.
  • the distance interval corresponding to the dynamic range the power curve is above the dotted line in FIG. 2A
  • the power curve is below the dotted line in FIG. 2A.
  • the horizontal axis represents distance
  • the vertical axis represents power
  • OTDR devices are installed at both ends of the optical fiber to increase the effective detection distance of the OTDR to the optical fiber.
  • Figure 3 is a schematic diagram of measuring optical fiber parameters using a double-ended OTDR solution in the related art.
  • site 1 and site 2 respectively represent the two ends of the optical fiber.
  • the internal structure of site 1 is similar to the structure shown in Fig. 1, and will not be repeated here.
  • the first port of WDM is used to connect to the optical fiber under test, and the second port (output port) of WDM is used to connect to an optical amplifier.
  • the probe optical pulse sent by OTDR2 is sent to the 3-port ring Port 1 of the three-port circulator or coupler D is used to receive the return signal, and port 2 of the three-port circulator or coupler D is used to connect to the third port of the WDM multiplexer.
  • the double-ended OTDR solution can increase the effective detection distance of the OTDR on the optical fiber, there are still the following problems: the total length of the optical fiber cannot be obtained, and thus the total delay information of the optical fiber cannot be obtained; the measurement curve of the optical fiber attenuation cannot be presented uniformly.
  • Fig. 4 shows a schematic diagram of the measurement curves of fiber attenuation respectively presented by the double-ended OTDR scheme in the related technology. As shown in Figure 4, the horizontal axis represents distance and the vertical axis represents power.
  • the embodiment of the present disclosure provides an optical fiber monitoring method. At least one OTDR is provided on the above-mentioned optical fiber, and a light reflecting device is provided on the opposite end of the end where the at least one OTDR is located.
  • the above-mentioned light reflection device may be an optical device with a certain reflectivity for the OTDR detection light wavelength, and the light reflection device may be a separate optical device, for example, a fiber grating, a coated lens, an etalon etalon and other devices.
  • the OTDR can be set at one end of the optical fiber, or the first OTDR and the second OTDR can be set at both ends of the optical fiber respectively.
  • the two cases are explained separately below.
  • Fig. 5 is a schematic diagram of measuring optical fiber parameters using a single-ended OTDR according to an embodiment of the present disclosure.
  • a light reflecting device is installed between the end of the fiber under test and the input end of the optical amplifier.
  • Fig. 6 is a schematic diagram of measuring optical fiber parameters using a double-ended OTDR solution according to an embodiment of the present disclosure.
  • the structure shown in FIG. 6 is basically the same as the structure shown in FIG. 4, and the difference lies in that: the station 1 and the station 2 are respectively provided with light reflecting devices.
  • arranging the optical reflection device on the OTDR optical port of the WDM can reduce the additional loss of service light.
  • the light reflecting device and WDM can also be arranged on a unified board.
  • FIG. 7 is a flowchart of an optical fiber monitoring method according to an embodiment of the present disclosure. As shown in FIG. 7, the process may include steps 701 to 702.
  • step 701 after using the first OTDR and the second OTDR to respectively emit the detection light signal, the measurement data of the first OTDR and the measurement data of the second OTDR are obtained respectively.
  • the detection light signal is transmitted through the optical fiber.
  • the OTDR can receive the return signal, and then the corresponding signal can be obtained according to the return signal. Measurement data.
  • the controller can obtain the corresponding measurement data from the OTDR.
  • the controller can be an Application Specific Integrated Circuit (ASIC), a digital signal processor (Digital Signal Processor, DSP), a digital signal processing device (Digital Signal Processing, etc.).
  • DSP Digital Signal Processor
  • DSP Digital Signal Processing, etc.
  • Device DSPD
  • Programmable Logic Device PLD
  • FPGA Field Programmable Gate Array
  • CPU Central Processing Unit
  • Controller Microcontroller, Micro At least one of the processors.
  • OTDR measurement data can be represented by the power curve shown in Figure 8.
  • the horizontal axis represents the distance
  • the vertical axis represents the power
  • L represents the total length of the optical fiber.
  • the measurement data of the OTDR can be represented by the power curve shown in Figure 9.
  • the horizontal axis represents the distance
  • the vertical axis represents the power.
  • the following is a theoretical calculation of the detection capability of the OTDR and the reflectivity of the light reflection device.
  • the OTDR After the OTDR transmits the detection light signal to the optical fiber, it detects the Rayleigh scattered light and Fresnel reflected light to determine the optical fiber attenuation and incident point information.
  • the back Rayleigh scattering coefficient of ordinary optical fiber is expressed as RdB.
  • D dynamic range of D
  • P min is the lowest optical power that the OTDR can detect
  • P 0 is the power of the detection light emitted by the OTDR.
  • the dynamic range of the combined detection in the dual-ended OTDR solution is 1+k times that of a single OTDR, and the OTDR is required to detect the reflected light power of the end point, the end point reflection coefficient ⁇ r (dB), ⁇ r ⁇ 0 , Should satisfy the following relationship:
  • the ⁇ (dB) in formula 1 is the available margin for the OTDR to distinguish the end point event points. This margin is related to the OTDR performance, and the available margins of different OTDRs are slightly different; formula 2 gives the reflection of the two-way OTDR scheme The reflectivity requirements of the device; Equation 3 gives the upper limit of the detection distance supported by the bidirectional OTDR solution (the upper limit of the distance corresponding to the dynamic range).
  • step 702 the measurement data of the first OTDR and the measurement data of the second OTDR are combined to obtain unified optical fiber measurement data.
  • the controller can directly follow the OTDR Measured data to get the length of the optical fiber.
  • the above-mentioned at least one OTDR includes a first OTDR and a second OTDR respectively provided at both ends of the optical fiber.
  • the first OTDR may be recorded as OTDR1
  • the second OTDR may be recorded as OTDR2.
  • the controller can obtain the length of the optical fiber in the following ways.
  • any one of the foregoing OTDRs may be an OTDR agreed upon in the first OTDR and the second OTDR.
  • the length of the optical fiber is obtained.
  • the first OTDR obtains the first length value of the optical fiber; obtain the second length value of the optical fiber according to the measurement data of the second OTDR; take the average value of the first length value and the second length value of the optical fiber as The length of the fiber.
  • the light reflecting device is a newly-added device for reflecting light signals, it can increase the ability to reflect the detection light signal. Furthermore, by adding a light reflecting device at the end of the optical fiber, it is easy to know the optical fiber Total length information.
  • the measurement data of the first OTDR or the second OTDR can be processed so that the measurement data of the first OTDR and the measurement data of the second OTDR correspond to the same distance interval; in the same distance interval Determine the data demarcation point; according to the data demarcation point, respectively intercept part of the measurement data of the first OTDR and the second OTDR measurement data; synthesize the intercepted data to obtain unified optical fiber measurement data.
  • the measurement data of each OTDR can be represented by a power curve graph.
  • the horizontal axis of the power graph represents distance and the vertical axis represents power.
  • the power curve of the first OTDR and the power curve of the second OTDR are placed in the same coordinate system.
  • the power curve of the second OTDR can be mirrored with the vertical axis as the symmetry axis, so that the power curve of the first OTDR and the second OTDR The power curves of the two OTDRs all correspond to the same distance interval.
  • FIG. 10 is a schematic diagram of the power curve of OTDR1 and the power curve of OTDR2 displayed in the same coordinate system according to an embodiment of the present disclosure.
  • Figure 10 can show a complete test curve of the optical fiber, where the length of the optical fiber can be denoted as L.
  • the disadvantage of using Figure 10 to present the complete test curve of the optical fiber is that it is different from the traditional single OTDR test curve.
  • the event point represents the discontinuous point in the optical fiber detected by the OTDR, such as the bend of the optical fiber (point with excessive loss caused by bending), connector, break point, and fusion splice point.
  • Event point information is generally listed on the user interface in tabular form, including the location, loss, reflectivity and other information of the event point.
  • the ratio of the dynamic range of the OTDR to the dynamic range of the second OTDR determines the data demarcation point in the same distance interval.
  • FIG. 10 shows a complete test curve when the fiber has no event point.
  • the horizontal distance between the data demarcation point and the vertical axis of the OTDR1 power curve is L*D1/(D1+D2), where , D1 represents the dynamic range of OTDR1, D2 represents the dynamic range of OTDR2, the horizontal distance between the data dividing point and the vertical axis of the power curve of OTDR1 is L*D2/(D1+D2).
  • the power curve of OTDR1 is cut when it is close to the vertical axis of the power curve of OTDR1
  • the power curve of OTDR2 is cut when it is close to the vertical axis of the power curve of OTDR2.
  • the intercepted curves are spliced, and a schematic diagram of the power curve shown in FIG. 11 after splicing can be obtained.
  • A represents the power value of any data point of the power curve of OTDR2
  • a is the power attenuation of the optical cable between the data point corresponding to the power value A and the data boundary point
  • the power value of the data boundary point can be recorded as A 0 .
  • the data point corresponding to A' can be determined in Figure 11.
  • the schematic diagram 1 of the unified optical fiber test curve shown in the double-ended OTDR solution shown in Figure 12 can be obtained. It can be seen that The optical fiber test curve shown is similar to that of a single-ended OTDR.
  • the controller determines the data demarcation point for the same distance interval, it can perform data interception and data splicing according to the data demarcation point, and then realize the synthesis of the intercepted data, and then control the user interface display and single-ended
  • the optical fiber test curve of OTDR is similar to the test curve.
  • the controller can use the fiber length information to merge the measurement data of the OTDR at both ends of the fiber, and then uniformly present the fiber attenuation curve on the user interface.
  • the embodiments of the present disclosure can accurately detect the length of the optical fiber, the total attenuation of the optical cable, and the location information of the event point.
  • the event point is used as the data dividing point.
  • the critical point of the distance interval corresponding to the dynamic range of any one of the OTDRs is used as the data demarcation point.
  • FIG. 13 is a schematic diagram of the power curve of OTDR1 and the power curve of OTDR2 displayed in the same coordinate system when an event point exists in the optical fiber according to an embodiment of the present disclosure.
  • the horizontal axis represents distance and the vertical axis represents power.
  • data processing can be performed in accordance with the data processing methods shown in Fig. 10 to Fig. 12 to obtain the unified fiber shown in Fig. 14 for the double-ended OTDR solution Diagram 2 of the test curve.
  • the optical fiber is also provided with a switching device, and the switching device connects an OTDR and a light reflecting device to the two ends of the optical fiber respectively.
  • the switching device can be implemented by at least one optical switch.
  • the controller can control the switching device to connect the two ends of the optical fiber to the first OTDR and the corresponding light reflecting device respectively, and obtain the measurement of the first OTDR after using the first OTDR to transmit the detection light signal Data; the controller can control the switching device to make the two ends of the optical fiber respectively connect the second OTDR and the corresponding light reflecting device, and after using the second OTDR to transmit the detection light signal, obtain the measurement of the second OTDR data.
  • Fig. 15 is a schematic structural diagram of obtaining measurement data of two OTDRs according to an embodiment of the present disclosure.
  • Figure 15 adds two new optical switches on the basis of Figure 6, namely optical switch 1 and optical switch 2.
  • the fixed end of optical switch 1 is connected to a port of WDM at site 1, and the active end of optical switch 1 is selective Connect the light reflection device of site 1 and port 2 of the circulator or coupler D in OTDR1.
  • the fixed end of the optical switch 2 is connected to a port of the WDM of the site 2, and the movable end of the optical switch 2 is selectively connected to the optical reflection device of the site 2 and the port 2 of the circulator or coupler D in the OTDR2.
  • the workflow of the embodiment of the present disclosure includes: when it is determined to use OTDR1 to measure the length of the optical fiber, the controller switches the optical switch 2 to the port of the optical reflection device, switches the optical switch 1 to the OTDR port, and OTDR1 Start the measurement and wait for the completion of the OTDR1 measurement, the controller switches the optical switch 1 to the port of the light reflection device, switches the optical switch 2 to the OTDR port, and OTDR2 starts the measurement.
  • the two OTDR measurement data are reported to the controller, and the controller obtains fiber length information based on the received measurement data, and after re-integrating the attenuation data and event information of the entire section of fiber, it controls the user interface for display.
  • the optical fiber is also provided with a coupling device for optically coupling the OTDR and the light reflecting device at the same end of the optical fiber.
  • the coupling device can be realized by at least one optical coupler.
  • the controller may control the working state of the coupling device so that the first OTDR and the second OTDR can receive respective measurement data after sending the detection light signal in sequence.
  • FIG. 16 is a schematic diagram of another structure for acquiring measurement data of two OTDRs according to an embodiment of the present disclosure.
  • Figure 16 adds two new optical couplers on the basis of Figure 6, namely optical coupler 1 and optical coupler 2.
  • optical coupler 1 is connected to the WDM, light reflecting device and circulator or coupler of site 1
  • the optical coupler 2 is connected between the WDM, the light reflecting device and the port 2 of the circulator or coupler D of the site 2.
  • the workflow of the embodiment of the present disclosure includes: the controller controls OTDR1 and OTDR2 to measure optical fiber parameters successively, and obtains measurement data of OTDR1 and OTDR2; the controller obtains optical fiber length information according to the received measurement data , And re-integrate the attenuation data and event information of the entire fiber, and then control the user interface to display it.
  • the structure for obtaining measurement data of two OTDRs is the structure shown in FIG. 6.
  • the light reflecting device includes: a first light reflecting device arranged between the second OTDR and the optical fiber, and a second light reflecting device arranged between the first OTDR and the optical fiber.
  • the first light reflecting device is used to reflect the detection light signal of the first OTDR and transmit the detection light signal of the second OTDR.
  • the second light reflecting device is used to reflect the detection light signal of the second OTDR and transmit the detection light signal of the first OTDR.
  • the controller can control OTDR1 and OTDR2 to measure fiber parameters simultaneously or sequentially, and obtain the measurement data of OTDR1 and OTDR2; the controller obtains fiber length information based on the received measurement data, and reintegrates After the attenuation data and event information of the entire fiber, control the user interface to display.
  • this embodiment proposes an optical fiber monitoring device.
  • the above-mentioned optical fiber inspection equipment includes a controller, a first OTDR and a second OTDR respectively provided at both ends of the optical fiber, and a light reflecting device provided at the opposite end of each OTDR.
  • the controller is used to obtain the measurement data of the first OTDR and the measurement data of the second OTDR after the first OTDR and the second OTDR respectively emit the detection light signal;
  • the measurement data of the second OTDR is synthesized and processed to obtain unified optical fiber measurement data.
  • the controller is configured to process the measurement data of the first OTDR or the second OTDR so that the measurement data of the first OTDR and the measurement data of the second OTDR correspond to the same distance Interval; determine the data demarcation point in the same distance interval; according to the data demarcation point, respectively intercept part of the measurement data of the first OTDR and the second OTDR measurement data; synthesize the intercepted data, Obtain unified fiber measurement data.
  • the controller is configured to determine the non-event point of the optical fiber according to the measurement data of the first OTDR and the measurement data of the second OTDR, according to the dynamic range of the first OTDR and the The ratio of the dynamic range of the second OTDR determines the data demarcation point in the same distance interval, wherein the event point represents a discontinuous point in the optical fiber.
  • the controller is configured to determine that there is an event point on the optical fiber according to the measurement data of the first OTDR and the measurement data of the second OTDR, and the event point is located in the first OTDR.
  • the event point is used as the data demarcation point, where the event point represents a discontinuous point in the optical fiber.
  • the controller is configured to determine that the optical fiber has an event point according to the measurement data of the first OTDR and the measurement data of the second OTDR, and the event point is not in any dynamic state of an OTDR
  • the critical point of the distance interval corresponding to the dynamic range of any one of the OTDRs is used as the data demarcation point, where the event point represents a discontinuous point in the optical fiber.
  • the device further includes a switching device arranged on the optical fiber, and the switching device connects an OTDR and a light reflecting device to both ends of the optical fiber, respectively.
  • the controller is used to control the switching device to make the two ends of the optical fiber connect to the first OTDR and the corresponding light reflecting device respectively, and after using the first OTDR to transmit the detection light signal, obtain the first OTDR measurement data; controlling the switching device to make the two ends of the optical fiber connect to the second OTDR and the corresponding light reflecting device respectively, and after using the second OTDR to transmit the detection light signal, the measurement of the second OTDR is obtained data.
  • the device further includes a coupling device for optically coupling the OTDR and the light reflecting device at the same end of the optical fiber.
  • the controller is used to obtain the respective measurement data of the first OTDR and the second OTDR after the first OTDR and the second OTDR sequentially send the detection light signal by controlling the working state of the coupling device .
  • the light reflecting device includes: a first light reflecting device arranged between the second OTDR and the optical fiber, and a second light reflecting device arranged between the first OTDR and the optical fiber Light reflection device.
  • the first light reflecting device is used to reflect the detection light signal of the first OTDR and transmit the detection light signal of the second OTDR.
  • the second light reflection device is used to reflect the detection light signal of the second OTDR and transmit the detection light signal of the first OTDR.
  • the optical fiber is provided with a first multiplexer for processing the service signal and the detection light signal emitted by the first OTDR, and a detection light signal for the service signal and the detection light signal emitted by the second OTDR
  • the second multiplexer for processing.
  • the light reflecting device includes a first light reflecting device and a second light reflecting device, the first light reflecting device is arranged at the OTDR port of the second multiplexer, and the second light reflecting device is arranged at The OTDR port of the first multiplexer.
  • optical fiber monitoring equipment of the embodiments of the present disclosure will be further described below with reference to the accompanying drawings.
  • Fig. 17 is a schematic diagram of circuit connections involved in an optical fiber monitoring device according to an embodiment of the present disclosure.
  • the controller 1701 communicates with OTDR1 1702, OTDR2 1703, and other auxiliary equipment 1704 respectively.
  • the other auxiliary equipment may be the above-mentioned switching devices, coupling devices, etc., and other auxiliary devices are optional configuration devices.
  • the controller 1701 can also control the display 1705 to display information such as a user interface.
  • the workflow of the optical fiber monitoring device of the embodiment of the present disclosure is: the controller manages and coordinates the operation of the underlying device, and at the same time receives the issued query instruction, can report the measurement data to the user terminal, and can control the user interface to display the measurement data;
  • the controller establishes communication with the OTDR and other auxiliary devices through the monitoring communication interface of the device; in specific display, the controller can control the display to display the user interface, and present the OTDR measurement results in the form of tables and graphs on the user interface.
  • the total length information of the optical fiber can be obtained based on the obtained measurement data. Furthermore, after the OTDR measurement data at both ends of the optical fiber are combined, it is beneficial to Unify and accurately present fiber measurement data.

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Abstract

L'invention concerne un procédé et un dispositif de surveillance de fibre optique. Deux extrémités d'une fibre optique sont respectivement pourvues d'un premier OTDR et d'un second OTDR et une extrémité opposée de chaque OTDR sur la fibre optique est pourvue d'un appareil réfléchissant la lumière. Le procédé de surveillance consiste à : après que le premier OTDR et le second OTDR sont utilisés pour émettre respectivement des signaux de lumière de sonde, acquérir respectivement des données de mesure du premier OTDR et des données de mesure du second OTDR ; et effectuer un traitement de synthèse sur les données de mesure du premier OTDR et les données de mesure du second OTDR pour obtenir des données de mesure de fibre optique unifiées.
PCT/CN2019/130587 2019-02-21 2019-12-31 Procédé et dispositif de surveillance de fibre optique WO2020168833A1 (fr)

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CN201910129498.4 2019-02-21
CN201910129498.4A CN111595241B (zh) 2019-02-21 2019-02-21 一种光纤监测方法和设备

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Cited By (2)

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