CN115225152A

CN115225152A - Optical network detection method, optical transceiver module and optical network equipment

Info

Publication number: CN115225152A
Application number: CN202210849524.2A
Authority: CN
Inventors: 闫宝罗; 吴琼; 施鹄
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-10-21
Also published as: WO2024016867A1

Abstract

The present disclosure provides an optical network detection method, including: frequency shifting an OTDR baseband signal to a sideband position of an OSC baseband signal of an optical monitoring channel to obtain an OTDR baseband frequency conversion signal; combining the OTDR baseband frequency conversion signal and the OSC baseband signal to generate an optical detection signal; and transmitting the detection optical signal to detect the optical network. The disclosure also provides an optical transceiver module and an optical network device.

Description

Optical network detection method, optical transceiver module and optical network equipment

Technical Field

The present disclosure relates to the field of optical communication technologies, and in particular, to an optical network detection method, an optical transceiver module, and an optical network device.

Background

The rise of high-bandwidth services such as internet of things, 5G, cloud computing and the like greatly promotes the development of an Optical Transport Network (OTN) on Network scale and data carrying capacity.

An Optical Supervisory Channel (OSC) is used to monitor and manage a network element state, and mainly transmits services such as protection switching, monitoring, and information overhead, and currently, a main stream OTN device uses a Small Form-factor Pluggable (SFP) Optical module with low cost to output an OSC Optical signal modulated by a hundred-mega signal rate and On-OFF Keying (OOK).

An Optical Time-Domain Reflectometer (OTDR) is mainly used for implementing Optical fiber line monitoring, where offline monitoring, such as detection of an Optical fiber length at an open stage and a same cable, and rapid positioning of a fiber breaking position when a fault occurs, can be implemented in a scene where OSC service is interrupted; on-line monitoring can also be realized in a scene that the OSC service is not interrupted, for example, the optical cable line is subjected to periodic OTDR monitoring, and timely early warning of fiber breakage and aging faults is realized. The basic principle of OTDR is to send an optical signal from the beginning of an optical fiber into the optical fiber, and because of the backward rayleigh scattering and fresnel reflection in the optical fiber, part of the light returns to the beginning of the optical fiber, and this part of the scattered light and the reflected light contain the information of the optical fiber line, and can be used to monitor the optical fiber.

Promoting the integration level of OTN devices, reducing power consumption and compression cost are key points for promoting product competitiveness, and a technical scheme capable of integrating OSC and OTDR functions on one board or one optical module is urgently needed.

Disclosure of Invention

The embodiment of the disclosure provides an optical network detection method, an optical transceiver component and an optical network device.

In a first aspect, an embodiment of the present disclosure provides an optical network detection method, including:

frequency shifting an OTDR baseband signal of an optical time domain reflectometer to a sideband position of an OSC baseband signal of an optical monitoring channel to obtain an OTDR baseband frequency conversion signal;

combining the OTDR baseband frequency conversion signal and the OSC baseband signal to generate an optical detection signal;

and transmitting the detection optical signal to detect the optical network.

In a second aspect, an embodiment of the present disclosure provides an optical network detection method, including:

receiving an optical detection signal sent by an opposite terminal, wherein the optical detection signal carries an OSC baseband signal and an OTDR baseband signal shifted to a sideband position of the OSC baseband signal;

and acquiring an OSC service signal according to the detection optical signal.

In a third aspect, an embodiment of the present disclosure provides an optical network detection method, including:

receiving a backward optical signal generated by transmitting an optical detection signal sent by a local terminal in an optical fiber, wherein the optical detection signal carries an OSC baseband signal and an OTDR baseband signal shifted to a sideband position of the OSC baseband signal;

and acquiring an OTDR service signal according to the backward optical signal.

In a fourth aspect, an embodiment of the present disclosure provides an optical transceiver component, including:

an optical transmitting module configured to transmit a first optical detection signal, where the first optical detection signal carries a first OSC baseband signal and a first OTDR baseband signal shifted to a sideband location of the first OSC baseband signal;

a first optical receiving module, configured to receive a second optical detection signal and obtain an OSC service signal according to the second optical detection signal, where the second optical detection signal carries a second OSC baseband signal and a second OTDR baseband signal that is frequency-shifted to a sideband position of the second OSC baseband signal;

and the second optical receiving module is used for receiving a backward optical signal generated by the transmission of the first detection optical signal in an optical fiber and acquiring an OTDR service signal according to the backward optical signal.

In a fifth aspect, an embodiment of the present disclosure provides an optical network device, including the optical transceiver component described in the fourth aspect of the embodiment of the present disclosure.

In the embodiment of the disclosure, the OTDR baseband frequency conversion signal shifted to the sideband position of the OSC baseband signal is loaded onto the OSC baseband signal and is uniformly modulated onto the optical carrier to generate the detection optical signal, so that aliasing of the OTDR baseband signal and the OSC baseband signal in the frequency domain can be avoided, integration of OSC and OTDR is realized, OSC service and OTDR service do not interfere with each other, OTDR online monitoring can be supported without interrupting OSC service, and reduction of the optical network fault rate and operation and maintenance cost is facilitated; after the OSC and the OTDR are integrated, the OSC baseband signal and the OTDR baseband signal do not interfere with each other, the dynamic range of the OTDR baseband signal is promoted, full-amplitude output is supported, and OTDR large dynamic range sensing is realized; the method is also beneficial to reducing the volume and the number of devices and improving the integration level of optical network products, thereby improving the competitiveness of the products.

Drawings

Fig. 1 is a flow chart of a method for detecting an optical network according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of integrated OSC and OTDR optical network detection in an embodiment of the present disclosure;

FIG. 3 is a flow chart of some steps in another optical network detection method in accordance with an embodiment of the present disclosure;

fig. 4 is a flowchart of a part of steps in another optical network detection method according to an embodiment of the present disclosure;

fig. 5 is a flow chart of a method for detecting an optical network according to an embodiment of the present disclosure;

fig. 6 is a flow chart of a method for detecting an optical network according to an embodiment of the present disclosure;

FIG. 7 is a block diagram of an optical transceiver module according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an optical transceiver module in an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of another optical transceiver module according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of another optical transceiver component in accordance with an embodiment of the present disclosure;

fig. 11 is a schematic diagram of a networking configuration in a two-fiber bidirectional scenario in an embodiment of the present disclosure;

fig. 12 is a schematic diagram of networking configuration in a single-fiber bidirectional scenario in the embodiment of the present disclosure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present disclosure, the following describes the optical network detection method, the optical transceiver module, and the optical network device provided in the present disclosure in detail with reference to the accompanying drawings.

Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," 8230; \8230 "; when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In a first aspect, referring to fig. 1, an embodiment of the present disclosure provides an optical network detection method, including:

s11, frequency shifting the OTDR baseband signal to a sideband position of the OSC baseband signal to obtain an OTDR baseband frequency conversion signal;

s12, combining the OTDR baseband frequency conversion signal and the OSC baseband signal to generate an detection optical signal;

and S13, sending the detection optical signal to detect the optical network.

In the embodiment of the present disclosure, in step S11, the OTDR baseband signal is shifted to the sideband position of the OSC baseband signal through an up-conversion frequency shift operation, and the information content and the modulation mode of the OTDR baseband signal are not changed during the up-conversion.

In the embodiment of the present disclosure, in the process of combining the OTDR baseband frequency conversion signal and the OSC baseband signal in step S12, the OTDR baseband frequency conversion signal after frequency shift is loaded onto the OSC baseband signal based on Pilot Tone (PT, pilot Tone) modulation, and then uniformly modulated onto the optical carrier, thereby implementing integration of OSC and OTDR.

It should be noted that the bandwidth of the OTDR baseband signal is usually in the KHz to several MHz, the bandwidth of the OSC baseband signal is usually in the hundred MHz, and the OTDR baseband signal and the OSC baseband signal are shown as a narrow and a wide spectrum as shown in fig. 2. Therefore, the frequency-shifted OTDR baseband frequency conversion signal is loaded on the OSC baseband signal, and aliasing of the OTDR baseband signal and the OSC baseband signal in the frequency domain can be avoided. After the OSC and the OTDR are integrated in the embodiment of the present disclosure, the OSC service and the OTDR service do not interfere with each other, and the on-line monitoring of the OTDR is supported without the OSC service being interrupted, which is beneficial to reducing the failure rate of the optical network and the operation and maintenance cost.

In the embodiment of the disclosure, the OSC baseband signal and the OTDR baseband signal have no interference with each other after integrating the OSC and the OTDR, so that the dynamic range of the OTDR baseband signal can be increased, full-amplitude output is supported, and large dynamic range sensing of the OTDR is realized. It should be noted that, in the embodiment of the present disclosure, the dynamic range refers to a decibel (dB) difference between a backscattering level at the beginning of the optical fiber and noise, that is, a range between a measured maximum optical power and a measured minimum optical power, and a size of the dynamic range determines a distance of the optical fiber that can be monitored by the OTDR.

In the embodiment of the disclosure, the OSC and the OTDR can be integrated into one optical transceiver module, which is beneficial to reducing the volume and number of used devices and improving the integration of optical network equipment, thereby improving the product competitiveness.

The embodiments of the present disclosure do not particularly limit how to shift the frequency of the OTDR baseband signal to the sideband position of the OSC baseband signal.

In some embodiments, shifting the OTDR baseband signal to a sideband location of the OSC baseband signal comprises: the OTDR baseband signal is shifted to a sideband location of the OSC baseband signal using the frequency source signal.

In some embodiments, the frequency source signal and the OTDR baseband signal are passed through a multiplier to perform an up-conversion and frequency-shift operation on the OTDR baseband signal.

The frequency of the frequency source signal is not particularly limited in the embodiments of the present disclosure.

In some embodiments, the frequency of the frequency source signal is 2 times the bandwidth of the OSC baseband signal.

In the embodiment of the present disclosure, performing an up-conversion and frequency-shifting operation on the OTDR baseband signal by using a frequency source signal having a frequency 2 times the bandwidth of the OSC baseband signal may ensure that the OTDR baseband signal is frequency-shifted to the sideband position of the OSC baseband signal.

In some embodiments, after shifting the frequency of the OTDR baseband signal to the sideband position of the OSC baseband signal to obtain the OTDR baseband frequency converted signal, the method for detecting an optical network further includes: and adjusting the amplitude of the OTDR baseband frequency conversion signal.

The disclosed embodiment does not specially limit how to adjust the amplitude of the OTDR baseband frequency converted signal. For example, the amplitude coefficient is set to 1 by adjusting the amplitude of the OTDR baseband frequency converted signal.

The embodiment of the present disclosure does not make any special limitation on how to perform PT modulation and load the frequency-shifted OTDR baseband frequency conversion signal onto the OSC baseband signal. For example, PT modulation may be performed in the electrical domain, or in the optical domain.

In some embodiments, PT modulation is performed in the electrical domain, and the frequency shifted OTDR baseband frequency converted signal is loaded onto the OSC baseband signal.

Accordingly, in some embodiments, referring to fig. 3, combining the OTDR baseband frequency converted signal with the OSC baseband signal to generate an optical detection signal comprises:

s121, adding the OTDR baseband frequency conversion signal and the OSC baseband signal to obtain an electric signal to be sent;

and S123, modulating the electric signal to be transmitted onto an optical carrier to obtain an optical detection signal.

In some embodiments, referring to fig. 3, before modulating an electrical signal to be transmitted onto an optical carrier to obtain an optical signal, the method further includes:

and S122, adjusting the amplitude of the electric signal to be transmitted according to the driving voltage of the modulator.

In the disclosed embodiments, modulating the amplitude of the electrical signal to be transmitted can ensure that the electrical signal to be transmitted matches the modulator drive voltage.

In some embodiments, PT modulation is performed in the optical domain, and the frequency shifted OTDR baseband frequency converted signal is loaded onto the OSC baseband signal.

Accordingly, in some embodiments, referring to fig. 4, combining the OTDR baseband frequency converted signal with the OSC baseband signal to generate the optical detection signal comprises:

s125, modulating the OSC baseband signal to a first optical carrier to obtain an OSC optical signal;

s126, modulating the OTDR baseband frequency conversion signal to a second optical carrier to obtain an OTDR optical signal;

and S127, combining the OTDR optical signal and the OSC optical signal to obtain the detection optical signal.

It should be noted that, in the embodiment of the present disclosure, the wavelengths of the first optical carrier and the second optical carrier are the same.

The first optical carrier and the second optical carrier may be optical carriers provided by two lasers, respectively, or may be optical carriers provided by one laser that are split into the first optical carrier and the second optical carrier. The embodiment of the present disclosure is not particularly limited in this regard.

Accordingly, in some embodiments, referring to fig. 4, before modulating the OTDR baseband frequency converted signal onto the first optical carrier and the OSC baseband signal onto the second optical carrier, the method further includes:

and S124, splitting the optical carrier to obtain a first optical carrier and a second optical carrier.

In the embodiment of the disclosure, the OSC service and the OTDR service share one laser, which is beneficial to saving a device space, compressing a device volume, improving a device integration level, and reducing a device cost.

The type of OTDR is not particularly limited in the embodiments of the present disclosure.

In some embodiments, the OTDR baseband signal is a sequenced OTDR signal.

The embodiments of the present disclosure do not specifically limit the sequenced OTDR signal. For example, the sequenced OTDR signal may be an M-sequenced OTDR signal or a gray-coded OTDR signal.

In the embodiment of the present disclosure, the use of the sequence-type OTDR signal can fully utilize the characteristic that the OTDR service in the embodiment of the present disclosure has no influence on the OSC service, and improve the noise suppression performance by coding gain, improving the computation complexity and the computation time, thereby realizing the monitoring of the large dynamic range of the optical cable.

In some embodiments, the OTDR baseband signal is a pulsed OTDR signal.

In a second aspect, referring to fig. 5, an embodiment of the present disclosure provides an optical network detection method, including:

s21, receiving an optical detection signal sent by an opposite terminal, wherein the optical detection signal carries an OSC baseband signal and an OTDR baseband signal shifted to a sideband position of the OSC baseband signal;

and S22, acquiring an OSC service signal according to the detection optical signal.

In the embodiment of the present disclosure, the sending side shifts the frequency of the OTDR baseband signal to the sideband position of the OSC baseband signal, loads the frequency-shifted OTDR baseband signal to the OSC baseband signal through PT modulation, and generates and sends the detection optical signal through unified modulation, thereby implementing OSC and OTDR integration. On the basis, the receiving side can acquire an OSC service signal from the received detection optical signal, and recover the OSC service.

In the embodiment of the present disclosure, steps S21 to S22 are performed on the reception side. It should be noted that, in the embodiment of the present disclosure, the opposite end is a concept opposite to the home end. When executing the OSC service, if one end executing steps S21 to S22, that is, the end receiving the detection optical signal is the home end, the opposite end is the end transmitting the detection optical signal; that is, in steps S21 to S22, the home terminal corresponds to the receiving side, and the opposite terminal corresponds to the transmitting side.

In the embodiment of the disclosure, the OSC service and the OTDR service do not interfere with each other, and can support OTDR online monitoring without the OSC service being interrupted, which is beneficial to reducing the failure rate of the optical network and the operation and maintenance cost; after the OSC and the OTDR are integrated, the OSC baseband signal and the OTDR baseband signal do not interfere with each other, the dynamic range of the OTDR baseband signal is favorably improved, full-amplitude output is supported, and large dynamic range sensing of the OTDR is realized; the method is also beneficial to reducing the volume and the number of devices and improving the integration level of optical network products, thereby improving the competitiveness of the products.

In some embodiments, acquiring the OSC service signal from the detected optical signal comprises: generating an OSC analog electrical signal according to the detection optical signal; and generating an OSC service signal according to the OSC analog electric signal.

In some embodiments, generating the OSC analog signal from the detected optical signal comprises: performing photoelectric conversion and electric analog signal amplification processing on the detection optical signal to obtain an initial analog electrical signal; the OSC analog electrical signal is obtained from the initial analog signal by low pass filtering.

In some embodiments, generating the OSC traffic signal from the OSC analog electrical signal comprises: and filtering, sampling and judging the OSC analog signal to obtain an OSC service signal.

In some embodiments, the OTDR baseband signal is a sequence-type OTDR signal or a pulse-type OTDR signal.

In a third aspect, referring to fig. 6, an embodiment of the present disclosure provides an optical network detection method, including:

s31, receiving a backward optical signal generated by transmission of an optical detection signal sent by a home terminal in an optical fiber, wherein the optical detection signal carries an OSC baseband signal and an OTDR baseband signal shifted to a sideband position of the OSC baseband signal;

and S32, acquiring the OTDR service signal according to the backward optical signal.

In the embodiment of the present disclosure, the sending side shifts the frequency of the OTDR baseband signal to the sideband position of the OSC baseband signal, loads the frequency-shifted OTDR baseband signal to the OSC baseband signal through PT modulation, and generates and sends the detection optical signal through unified modulation, thereby implementing OSC and OTDR integration. On this basis, the receiving side can recover the OSC service from the received detection optical signal.

In the embodiment of the present disclosure, steps S31 to S32 are performed on the transmission side. It should be noted that, in the embodiment of the present disclosure, the opposite end is a concept opposite to the home end. When performing the OTDR service, if one end performing steps S31 to S32, that is, the end transmitting the detection optical signal is the home end, the opposite end is the end receiving the detection optical signal; that is, in steps S31 to S32, the home terminal corresponds to the transmitting side, and the opposite terminal corresponds to the receiving side.

It should be noted that the backward optical signal is a backward rayleigh scattering signal and/or a fresnel reflection signal generated in the transmission process of the detection optical signal sent by the local terminal in the optical fiber and received by the local terminal. Since the detection optical signal carries the OSC baseband signal and the OTDR baseband signal, the backward optical signal is a backward rayleigh scattering signal and/or a fresnel reflection signal generated by the OSC service and the OTDR service together.

In the embodiment of the disclosure, the OSC service and the OTDR service do not interfere with each other, and can support OTDR online monitoring without the OSC service being interrupted, which is beneficial to reducing the failure rate of the optical network and the operation and maintenance cost; after the OSC and the OTDR are integrated, the OSC baseband signal and the OTDR baseband signal do not interfere with each other, the dynamic range of the OTDR baseband signal is favorably improved, full-amplitude output is supported, and large dynamic range sensing of the OTDR is realized; the method is also favorable for reducing the volume and the number of devices and improving the integration level of optical network products, thereby improving the competitiveness of the products.

In some embodiments, acquiring the OTDR traffic signal from the backward optical signal includes: obtaining an OTDR backward signal according to the backward optical signal; and obtaining the OTDR service signal according to the OTDR backward signal.

In the embodiment of the present disclosure, the backward optical signal is a backward rayleigh scattering signal and/or a fresnel reflection signal generated by OSC traffic and OTDR traffic, and the OTDR backward signal refers to a backward rayleigh scattering signal and/or a fresnel reflection signal generated by OTDR traffic in the backward optical signal.

In some embodiments, obtaining the OTDR backward signal from the backward optical signal comprises: performing photoelectric conversion and electric analog signal amplification processing on the backward optical signal to obtain an initial backward signal; performing frequency conversion processing on the initial backward signal by using a frequency source signal so as to shift the frequency of a signal component corresponding to the OTDR baseband signal in the initial backward signal to a zero frequency position; and acquiring a signal component corresponding to the OTDR baseband signal in the initial backward signal after frequency conversion processing through low-pass filtering to obtain the OTDR backward signal.

It should be noted that, since the sending side performs the frequency up-conversion and frequency shift operation on the OTDR, components of the backward rayleigh scattering signal and/or the fresnel reflection signal generated by the OTDR service in the backward optical signal are also located at corresponding sideband positions. The frequency source signal is utilized to carry out frequency conversion processing on the initial backward signal, which is equivalent to down-conversion frequency shift operation on the backward optical signal, so that the component of backward Rayleigh scattering signals and/or Fresnel reflection signals generated by OTDR service in the backward optical signal is shifted to a zero-frequency position.

In the embodiment of the present disclosure, the frequency source signal used for the down-conversion frequency shift operation on the receiving side coincides with the frequency source signal used for the up-conversion frequency shift operation on the transmitting side.

In some embodiments, acquiring the OTDR traffic signal from the OTDR backward signal includes: and filtering, analog-to-digital conversion sampling and operation processing are carried out on the OTDR backward signal to obtain an OTDR service signal.

In a fourth aspect, referring to fig. 7, an embodiment of the present disclosure provides an optical transceiver module, including:

the optical transmission module 100 is configured to transmit a first optical detection signal, where the first optical detection signal carries a first OSC baseband signal and a first OTDR baseband signal shifted to a sideband position of the first OSC baseband signal;

a first optical receiving module 200, configured to receive a second optical detection signal and obtain an OSC service signal according to the second optical detection signal, where the second optical detection signal carries a second OSC baseband signal and a second OTDR baseband signal that is frequency-shifted to a sideband position of the second OSC baseband signal;

the second optical receiving module 300 is configured to receive a backward optical signal generated by transmission of the first detection optical signal in the optical fiber, and obtain an OTDR service signal according to the backward optical signal.

In the embodiment of the present disclosure, the optical transceiver component includes an optical sending module, a first optical receiving module, and a second optical receiving module, and not only can send a first detection optical signal carrying an OSC baseband signal and an OTDR baseband signal through frequency up-conversion and frequency shift and PT modulation, but also can extract an OSC service from a second detection optical signal sent by the optical transceiver component at the opposite end, and can also receive a backward optical signal generated by the transmission of the first detection optical signal in an optical fiber to perform OTDR detection, so that the OSC and the OTDR are integrated into one optical transceiver component, and the OSC service and the OTDR service do not interfere with each other, and can support OTDR online monitoring without interrupting the OSC service, thereby facilitating reduction of an optical network failure rate and an operation and maintenance cost; after the OSC and the OTDR are integrated, the OSC baseband signal and the OTDR baseband signal do not interfere with each other, the dynamic range of the OTDR baseband signal is promoted, full-amplitude output is supported, and OTDR large dynamic range sensing is realized; the method is also beneficial to reducing the volume and the number of devices and improving the integration level of optical network products, thereby improving the competitiveness of the products.

In some embodiments, the optical transmission module 100 includes:

the first frequency conversion unit is used for shifting the frequency of the first OTDR baseband signal to the sideband position of the second OSC baseband signal to obtain a first OTDR baseband frequency conversion signal;

and the modulation unit is used for combining the first OTDR baseband frequency conversion signal and the first OSC baseband signal, and generating and sending a first detection optical signal.

In some embodiments, referring to fig. 8, 9 and 10, the first frequency conversion unit comprises a frequency source 101 and a first multiplier 102, the first multiplier 102 is connected to the frequency source 101 and an OTDR input TX of the optical transceiver component _OTDR Data In connection;

the frequency source 101 is used for providing a frequency source signal;

the first multiplier 102 is used for multiplying the frequency source signalFrom OTDR input TX _OTDR And shifting the frequency of the first OTDR baseband signal input by the Data In to the sideband position of the OSC baseband signal, and outputting a first OTDR baseband frequency conversion signal.

In some embodiments, referring to fig. 8, 9, and 10, the first frequency conversion unit further includes an electric power divider 103, and the electric power divider 103 is connected between the frequency source 101 and the first multiplier 102, and between the frequency source 101 and the second multiplier 302 in the second light receiving module 300; the power divider 103 is configured to provide the frequency source signal to the first multiplier 102 and the second multiplier 302, respectively.

In some embodiments, referring to fig. 8 and 10, the modulation unit includes an adder 104, a laser 105, and a modulator 106, wherein the adder 104 and the OSC input TX of the optical transceiver component _OSC The Data In is connected with the first multiplier 102, the modulator 106 is connected with the adder 104, the laser 105 and the optical output end of the optical transceiver module;

a laser 105 is used to provide an optical carrier;

the adder 104 is used for adding the first OTDR baseband frequency converted signal to the OSC input end TX _OSC Adding first OSC baseband signals input by Data In and outputting an electric signal to be transmitted;

the modulator 106 is configured to modulate an electrical signal to be transmitted onto an optical carrier, and output an optical detection signal.

In some embodiments, the modulation unit further comprises a driver 107, the driver 107 being connected between the adder 104 and the modulator 106; the driver 107 is used to adjust the amplitude of the electrical signal to be transmitted in accordance with the modulator drive voltage.

In some embodiments, referring to fig. 9, the modulation unit includes a laser 105, a first optical coupler 108, a second optical coupler 109, a first modulator 110, a second modulator 111; the first optical coupler 108 is connected to the laser 105, the first modulator 110, and the second modulator 111, the second optical coupler 109 is connected to the first modulator 110, the second modulator 111, and the optical output end of the optical transceiver module, and the first modulator 110 is connected to the OSC input end TX of the optical transceiver module _OSC Data In connection, the second modulator 111 is connected with the first multiplier 102;

a laser 105 is used to provide an optical carrier;

the first optical coupler 108 is configured to split the optical carrier, provide the first optical carrier to the first modulator 110, and provide the second optical carrier to the second modulator 111;

the first modulator 110 is arranged to receive the input TX from the OSC terminal _OSC Modulating a first OSC baseband signal input by Data In to a first optical carrier to obtain an OSC optical signal;

the second modulator 111 is configured to modulate the first OTDR baseband frequency conversion signal onto a second optical carrier to obtain an OTDR optical signal;

the second optical coupler 109 is configured to combine the OTDR optical signal and the OSC optical signal, and output an optical detection signal.

In some embodiments, referring to fig. 9, the modulation unit further comprises a first driver 112 and a second driver 113; the first driver 112 is connected to the OSC input TX _OSC Data In is connected between the first modulator 110, and the second driver 113 is connected between the first multiplier 102 and the second modulator 111;

the first driver 112 is configured to adjust an amplitude of the first OSC baseband signal according to the driving voltage of the first modulator 110;

the second driver 113 is configured to adjust the amplitude of the first OTDR baseband converted signal according to the driving voltage of the second modulator 111.

In some embodiments, referring to fig. 8, 9, and 10, the first light receiving module 200 includes a first photoelectric conversion unit 201, a first low pass filter 202, and a first signal processing unit 203; the first signal processing unit 203 and the OSC output terminal RX of the optical transceiver module _OSC Data Out connection, a first photoelectric conversion unit 201 is connected with the optical input end of the optical transceiving component, and a first low-pass filter 202 is connected between a first signal processing unit 203 and the first photoelectric conversion unit 201;

the first photoelectric conversion unit 201 is configured to perform photoelectric conversion and electrical analog signal amplification processing on the second detection optical signal to obtain an initial analog electrical signal;

the first low-pass filter 202 is configured to obtain an OSC analog electrical signal from the initial analog signal by low-pass filtering;

the first signal processing unit 203 is configured to filter, sample, and perform criterion processing on the OSC analog signal to obtain an OSC service signal.

In some embodiments, the optical input end of the optical transceiver component and the optical output end of the optical transceiver component are the same port; the wavelength of the first detection optical signal is different from the wavelength of the second detection optical signal.

In some embodiments, the second light receiving module 300 includes: the second frequency conversion unit is used for acquiring an OTDR backward signal according to the backward optical signal; and the second signal processing unit is used for acquiring the OTDR service signal according to the OTDR backward signal.

In some embodiments, referring to fig. 8, 9, and 10, the second frequency conversion unit includes a second photoelectric conversion unit 301, a second multiplier 302, and a second low-pass filter 303; the second photoelectric conversion unit 301 is connected between the second multiplier 302 and the optical output end of the optical transceiver module, and the second low-pass filter 303 is connected between the second multiplier 302 and the second signal processing unit; the second multiplier 302 is connected with the frequency source 101 in the optical transmission module 100 through the electrical power splitter 103 in the optical transmission module 100;

the second photoelectric conversion unit 301 is configured to perform photoelectric conversion and electrical analog signal amplification processing on the backward optical signal to obtain an initial backward signal;

the second multiplier 302 is configured to perform frequency conversion processing on the initial backward signal by using a frequency source signal provided by the power divider 103 through frequency, so as to shift a frequency of a signal component corresponding to the OTDR baseband signal in the initial backward signal to a zero frequency position;

the second low-pass filter 303 is configured to obtain, through low-pass filtering, a signal component corresponding to the OTDR baseband signal in the initial backward signal after the frequency conversion processing, to obtain the OTDR backward signal.

In some embodiments, the second signal processing unit 304 is connected to the OTDR output RX of the optical transceiver component _OTDR The Data Out connection, the second signal processing unit 304 is used for filtering, analog-to-digital conversion sampling and arithmetic processing the OTDR backward signal to obtainAn OTDR traffic signal.

In some embodiments, referring to fig. 8, 9, 10, the optical transceiver assembly further includes a combiner-splitter 400, the combiner-splitter 400 being connected between the optical transmitting module 100 and the optical output of the optical transceiver assembly, and between the second optical receiving module 300 and the optical output; the combiner-splitter is used for sending a first detection optical signal through an optical output end and receiving a backward optical signal through the optical output end.

The optical transceiver module in the embodiment of the present disclosure may be used in a dual-fiber bidirectional scene, and may also be used in a single-fiber bidirectional scene.

In some embodiments, referring to fig. 10, the multiplexer/demultiplexer 400 is further connected between the first optical receiving module 200 and the optical input end of the optical transceiving module; the combiner-splitter 400 is also configured to receive a second detected optical signal via the optical input; the optical transceiver module further includes an optical splitter 500, and the optical splitter 500 is connected between the multiplexer/demultiplexer 400 and the first optical receiving module 200, and between the multiplexer/demultiplexer 400 and the second optical receiving module 300; the optical splitter 500 is configured to transmit the second detection optical signal to the first optical receiving module 200 according to the wavelength, and transmit the backward optical signal to the second optical receiving module 300; the optical input end and the optical output end are the same port; the wavelength of the first detection optical signal is different from the wavelength of the second detection optical signal and the backward optical signal.

In some embodiments, the first OTDR baseband signal, the second OTDR baseband signal is a sequence OTDR signal or a pulse OTDR signal.

In order to make the technical solutions provided by the embodiments of the present disclosure more clearly understood by those skilled in the art, the technical solutions provided by the embodiments of the present disclosure are described in detail below by specific examples:

example one

The present embodiment does not limit the type of using OTDR, that is, supports both a sequence type and a pulse type. Preferably, a sequence OTDR (e.g., M sequence, gray code sequence, etc.) is used, because the dynamic range performance of the pulse OTDR is limited under the condition of limited power, if the sequence OTDR is used, the characteristic that the OTDR measurement in this embodiment has no influence on the OSC service can be fully utilized, and the noise suppression performance can be improved by coding gain, increasing the operation complexity and the calculation time, thereby realizing the large dynamic range monitoring of the optical cable.

As shown in fig. 2, the OSC baseband signal may be denoted as a _OSC (t) =0,1., OTDR baseband signal may be expressed as a _OTDR (t) =0,1.. Since OSC baseband signal bandwidth is typically hundreds of MHz in magnitude and OTDR signal bandwidth is typically KHz to several MHz in magnitude, it appears to be wide and narrow in spectrum. The method comprises the steps that sine waves with the frequency f generated by a frequency source are divided into two parts by an electric splitter, the sine waves and OTDR baseband signals pass through a first multiplier to realize the up-conversion frequency shift operation with the frequency f on the OTDR baseband signals, and the OTDR baseband signals are shifted to the sideband position of OSC baseband signals, namely 2B _OSC,3dB It can be expressed as:

f＝2×B _OSC,3dB (1)

further, an OTDR baseband frequency conversion signal amplitude value is controlled, so that the amplitude coefficient is m. The electric signal adjusts the signal amplitude through a driver, then adds the up-converted OTDR signal and the OSC signal through an adder, loads the added signal on an optical carrier generated by a laser through a modulator, and then enters an optical fiber to be monitored through a combiner-splitter (wherein the combiner-splitter may be an optical coupler, a light splitting sheet, an optical circulator, preferably an optical circulator), and the optical power of the signal can be expressed as (ignoring insertion loss):

wherein m is the amplitude coefficient of the OTDR baseband signal,

to an initial phase, P _in Is the input optical power.

For the OSC service, neglecting the optical fiber transmission loss, taking back-to-back transmission as an example, the receiving side performs photoelectric conversion and electrical analog signal amplification through the first photoelectric conversion unit, and the signal at the receiving side can be expressed as:

wherein k is the gain of the photoelectric conversion unit and the pass bandwidth is 2B _OSC,3dB (i.e.: B) _LPF，1 ＝2B _OSC,3dB ) Demodulates the received OSC signal, an OSC voltage signal RX _OSC Can be expressed as:

RX _OSC ＝A _OSC (t)kP _in (4)

wherein A is _OSC (t) is OSC baseband signal, k is gain of the photoelectric conversion unit, P _in Is the input optical power. And then the OSC analog signal is filtered, sampled, judged and the like by the first signal processing unit to recover the OSC service.

For the OTDR service, after the receiving side performs photoelectric conversion and amplification through the second photoelectric conversion unit, the collected signal is a backward rayleigh scattering signal generated by two services, namely OSC and OTDR in the channel, and what we need is the backward rayleigh scattering signal generated by the OTDR service, so that we divide the signal and a sine wave with frequency f generated by the frequency source into two parts through the electrical splitter, and then pass through the second multiplier to implement down-conversion operation on the signal, and move the backward rayleigh scattering signal generated by the OTDR service to a zero-frequency position, where the signal can be represented as:

wherein hb (t) is the unit impulse response of the fiber backward Rayleigh scattering system,

in order to determine the phase of the local oscillator radio frequency signal,

is a convolution operation. Further, the pass bandwidth is equal to 2 times the OTDR baseband signal bandwidth (i.e. B) _LPF，2 ＝2B _OTDR,3dB ) The second low-pass filter filters out a double frequency component and backward Rayleigh scattering generated by the double frequency component, and an OTDR voltage signal at the receiving side can be obtained through a direct detection mode.

And further, the detailed information of the optical fiber link can be obtained by filtering, ADC sampling, sequence OTDR related operation and the like of the OTDR backward Rayleigh scattering analog signal through the second signal processing unit.

Example two

Referring to fig. 8, an optical transceiver module with an integrated OTDR monitoring function includes a laser, a modulator, a driver, a first multiplier, a second multiplier, an adder, a frequency source, an electrical splitter, a first low-pass filter, a second low-pass filter, a first photoelectric conversion unit, a second photoelectric conversion unit, a combiner-splitter, a first signal processing unit, and a second signal processing unit.

The transmitting side structure of an optical transceiver module integrated with an OTDR monitoring function is as follows, firstly, sending OSC and OTDR baseband signals to the optical transceiver module of this embodiment on a single board side, that is, TX in the figure _OSC Data In、TX _OTDR Data In. The OSC baseband signal rate is 125Mbps and OOK modulation, the OTDR signal adopts M sequence type OTDR, the chip width is 6000ns (the chip rate is 0.1667 Mchips/s), and the sequence order is 13 orders. The frequency source generates a sine wave with frequency f, which is passed through an electrical splitter, and the OTDR baseband signal is passed through a first multiplier (where the first multiplier, preferably, a multiplication mixer chip is used), so that the OTDR baseband signal is up-converted to the first sideband position of the OSC baseband signal, where the frequency f needs to be equal to 125MHz, and the amplitude value of the baseband signal is controlled such that the amplitude coefficient m is 1, and then the PT modulation depth is 50%. After the OTDR baseband frequency converted signal and the OSC baseband signal are added by an adder (where the adder, preferably, an addition circuit based on an operational amplifier, is used), the amplitude of the signal is adjusted by a driver to match the driving voltage of the modulator, and then the laser outputs an optical carrier having a wavelength of 1510nm, which is modulated by the driverThe device loads the signals, the peak power of the signals is 7dBm, the extinction ratio is 10dB, and the signals are output and sent to an optical fiber link through a combiner-splitter, wherein the combiner-splitter selects an optical circulator in the embodiment.

For OSC service receiving, an opposite end signal is subjected to photoelectric conversion and electric analog signal amplification through a first photoelectric conversion unit, wherein the first photoelectric conversion unit comprises a photoelectric detector and an amplifier, the photoelectric detector is a photodiode, the bandwidth is 150MHz, the receiving sensitivity is-45 dBm, the gain k of the first photoelectric conversion unit is =3000V/mW, then the OSC analog signal is extracted through a first low-pass filter with the bandwidth of 125MHz, and then the OSC analog signal is filtered through a first signal processing unit, sampled at the ADC sampling rate of 250Msps and processed through criteria and the like, so that the OSC service can be recovered. For receiving the OTDR service, the receiving side performs photoelectric conversion and electrical analog signal amplification through the second photoelectric conversion unit, an avalanche diode is selected, the bandwidth is 150MHz, the receiving sensitivity is-55 dBm, the gain k =27000V/mW of the second photoelectric conversion unit, and a signal generated by dividing a sine wave with a frequency f of 125MHz generated by the frequency source into two parts through an electrical splitter passes through a second multiplier (wherein the second multiplier, preferably, a multiplication frequency mixing chip), so as to implement down-conversion operation of the signal, and move a backward rayleigh scattering signal generated by the OTDR service to a zero-frequency position. And then filtering through a second low-pass filter with the bandwidth of 10MHz, filtering the OTDR backward Rayleigh scattering analog signal through a second signal processing unit, sampling with the ADC sampling rate of 250Msps, performing operation related to the sequence OTDR and the like to obtain detailed information of the optical fiber link.

EXAMPLE III

As shown in fig. 9, a schematic diagram of another optical transceiver module for implementing an integrated OTDR monitoring function is shown, and different from the second embodiment, in this embodiment, a signal on a transmitting side implements PT modulation on an optical domain. The laser comprises a laser, a first modulator, a second modulator, a first driver, a second driver, a first multiplier, a second multiplier, a frequency source, an electric power divider, a first low-pass filter, a second low-pass filter, a first photoelectric conversion unit, a second photoelectric conversion unit, a multiplexer-demultiplexer, a first optical coupler, a second optical coupler, a first signal processing unit and a second signal processing unit.

The transmitting side structure of an optical transceiver module integrated with an OTDR monitoring function is as follows, firstly, sending OSC and OTDR baseband signals to the optical transceiver module of this embodiment on a single board side, that is, TX in the figure _OSC Data In、TX _OTDR Data In. The OSC baseband signal rate is 125Mbps, OOK modulation, the signal amplitude is adjusted by the first driver to match the driving voltage of the first modulator, then the laser outputs an optical carrier wave with a wavelength of 1510nm, the signal peak power is 7dBm, the extinction ratio is 10dB, and the OSC baseband signal passes through the first optical coupler 50: after 50 optical splits, one route is used by the first modulator to load the OSC baseband signal in the optical domain. The OTDR signal adopts M sequence type OTDR, the chip width is 6000ns (the chip rate is 0.1667 Mchips/s), and the sequence order is 13 orders. The frequency source generates a sine wave with frequency f, which is passed through an electrical splitter, and the OTDR baseband signal is passed through a first multiplier (where the first multiplier, preferably, a multiplication mixer chip is used), so that the OTDR baseband signal is up-converted to the first sideband position of the OSC baseband signal, where the frequency f needs to be equal to 125MHz, and the amplitude value of the baseband signal is controlled such that the amplitude coefficient m is 1, and then the PT modulation depth is 50%. The OTDR baseband frequency conversion signal adjusts the signal amplitude through a second driver to match with the driving voltage of a second modulator, and then the OTDR baseband frequency conversion signal is loaded by the other path of optical carrier of the first optical coupler through the second modulator. Then, the OSC optical signal and the OTDR baseband frequency converted optical signal are combined by the second optical coupler, and then sent to the optical fiber link by the combiner/splitter, where the combiner/splitter selects an optical circulator in this embodiment.

For OSC service receiving, an opposite end signal is subjected to photoelectric conversion and electric analog signal amplification through a first photoelectric conversion unit, wherein the first photoelectric conversion unit comprises a photoelectric detector and an amplifier, the photoelectric detector adopts a photodiode, the bandwidth is 150MHz, the receiving sensitivity is-45 dBm, the gain k of the first photoelectric conversion unit is =3000V/mW, then the OSC analog signal is extracted through a first low-pass filter with the bandwidth of 125MHz, and then the OSC analog signal is filtered through a first signal processing unit, and sampling, criterion and the like with the ADC sampling rate of 250Msps can restore the OSC service. For receiving the OTDR service, the receiving side performs photoelectric conversion and electrical analog signal amplification through the second photoelectric conversion unit, an avalanche diode is used, the bandwidth is 150MHz, the receiving sensitivity is-55 dBm, the gain k =27000V/mW of the second photoelectric conversion unit, and a signal generated by dividing a sine wave with a frequency f of 125MHz generated by the frequency source into two parts through an electrical splitter passes through a second multiplier (wherein the second multiplier, preferably, a multiplying mixer chip), so as to implement down-conversion of the signal, and move a backward rayleigh scattering signal generated by the OTDR service to a zero-frequency position. And then filtering through a second low-pass filter with the bandwidth of 10MHz, filtering the OTDR backward Rayleigh scattering analog signal through a second signal processing unit, sampling with the ADC sampling rate of 250Msps, performing operation related to the sequence OTDR, and the like to obtain detailed information of the optical fiber link.

Example four

As shown in fig. 10, a schematic diagram of an optical transceiver module integrated with an OTDR monitoring function in a single-fiber bidirectional scenario is shown, and different from the second embodiment, the optical transceiver module shares a port for input and output, and is used in a single-fiber bidirectional application scenario, and the optical transceiver module needs to be used in pairs and configure optical carriers with different wavelengths. The device comprises a laser, a modulator, a driver, a first multiplier, a second multiplier, an adder, a frequency source, an electric power divider, a first low-pass filter, a second low-pass filter, a first photoelectric conversion unit, a second photoelectric conversion unit, a combiner-divider, a first signal processing unit, a second signal processing unit and an optical splitter.

The transmitting side structure of an optical transceiver module integrated with an OTDR monitoring function is as follows, firstly, sending OSC and OTDR baseband signals to the optical transceiver module of this embodiment on a single board side, that is, TX in the figure _OSC Data In、TX _OTDR Data In. The OSC baseband signal rate is 125Mbps and OOK modulation, the OTDR signal adopts M sequence type OTDR, the chip width is 6000ns (the chip rate is 0.1667 Mchips/s), and the sequence order is 13 orders. Frequency source generating frequencyThe sine wave at f is passed through an electrical splitter and the OTDR baseband signal is passed through a first multiplier (where the first multiplier, preferably using a multiplying mixer chip), so that the OTDR baseband signal is up-converted to the first sideband position of the OSC baseband signal, where the frequency f needs to be equal to 125MHz, and the baseband signal amplitude value is controlled so that the amplitude coefficient m is 1, at which time the PT modulation depth is 50%. After the OTDR baseband frequency conversion signal and the OSC baseband signal are added by an adder (where the adder, preferably, an adding circuit based on an operational amplifier), the amplitude of the signal is adjusted by a driver to match the driving voltage of the modulator, and then the laser outputs a wavelength λ ₁ The signals are loaded on 1510nm optical carriers by a modulator, the peak power of the signals is 7dBm, the extinction ratio is 10dB, and the signals are output and sent to an optical fiber link through a combiner-splitter, wherein the combiner-splitter selects an optical circulator in the embodiment.

The structure of another matched optical transceiver module with integrated OTDR monitoring function is different from that of the optical transceiver module with integrated OTDR monitoring function ₂ Is an optical carrier wave of 1491 nm. In normal operation, there are 4 types of traffic in fibre channel, i.e. λ ₁ OSC, λ of ₁ OTDR, λ of ₂ OSC, λ of ₂ The OTDR of (1).

For OSC service reception, an opposite end signal enters an optical splitter through an optical circulator, and the function of the optical splitter is to separate lambda according to wavelength ₁ 、λ ₂ In this embodiment, the optical splitter selects the WDM splitter to make the wavelength at the opposite end be λ ₂ The signal of (2) enters a first photoelectric conversion unit, local lambda ₁ The backscattered signal enters the second photoelectric conversion unit. The method comprises the steps of completing photoelectric conversion and electric analog signal amplification through a first photoelectric conversion unit, wherein the first photoelectric conversion unit comprises a photoelectric detector and an amplifier, the photoelectric detector adopts a photodiode, the bandwidth is 150MHz, the receiving sensitivity is-45 dBm, the gain of the first photoelectric conversion unit is 3000V/mW, an OSC analog signal is extracted through a first low-pass filter with the bandwidth of 125MHz, then the OSC analog signal is filtered through a first signal processing unit, sampling with the ADC sampling rate of 250Msps, criterion processing and the like are carried out, and the OSC analog signal is subjected to sampling and criterion processingOSC traffic can be restored. For OTDR service reception, the receiving side splitter outputs λ ₁ The signal of (2) is subjected to photoelectric conversion and electric analog signal amplification through a second photoelectric conversion unit, an avalanche diode is selected, the bandwidth is 150MHz, the receiving sensitivity is-55 dBm, the gain k =27000V/mW of the second photoelectric conversion unit and a sine wave with the frequency f of 125MHz generated by a frequency source are divided into two signals through an electric splitter, and the two signals are subjected to a second multiplier (wherein the second multiplier, preferably a multiplication mixing chip) to realize down-conversion operation of the signal and move backward rayleigh scattering signals generated by OTDR service to a zero-frequency position. And then filtering through a second low-pass filter with the bandwidth of 10MHz, filtering the OTDR backward Rayleigh scattering analog signal through a second signal processing unit, sampling with the ADC sampling rate of 250Msps, performing operation related to the sequence OTDR and the like to obtain detailed information of the optical fiber link.

EXAMPLE five

As shown in fig. 11, a schematic diagram of a networking configuration in a two-fiber bidirectional scenario is shown. A single board of each of the station 1 and the station 2 is configured with 2 optical transceiver modules according to the second embodiment or the third embodiment, the network element 1 is connected to the optical fiber 1 and the optical fiber 2, the network element 2 is connected to the optical fiber 4 and the optical fiber 5, the network element 3 is connected to the optical fiber 2 and the optical fiber 3, and the network element 4 is connected to the optical fiber 5 and the optical fiber 6, so that the network element 1, the network element 3, the network element 4, and the network element 2 are interconnected and intercommunicated in a clockwise direction through an OSC service. Since the OTDR service and the OSC service are bound in the direction, the OTDR can monitor only the optical fiber in the opposite direction, for example, the single board of the site 1 can monitor only the optical fiber 2 and the optical fiber 4. Therefore, all optical fibers in the network can be monitored on line.

Other types of dual-fiber bidirectional networking configurations based on the embodiment can be extended by the embodiment, and are all within the protection scope of the present disclosure.

EXAMPLE six

As shown in fig. 12, a schematic diagram of a networking configuration in a single-fiber bidirectional scenario is provided. Each site single board is configured with 2 optical transceiver modules according to the fourth embodiment, and the optical transceiver modules configure the wavelength λ clockwise ₁ 1510nm and anticlockwise direction lambda are selected ₂ Choose 1491nm, and OSC between the network elements can be interconnected and intercommunicated. Because the OTDR service and OSC service are bound, bidirectional paired OTDR can be supported in one optical fiber, for example, optical fiber 2 can simultaneously carry out lambda ₁ And λ ₂ Compared with the two-way configuration of the two fibers in the fifth embodiment, the equivalent dynamic range of the OTDR monitoring is improved by 1 time. Therefore, all optical fibers in the network can be monitored on line.

Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, features, characteristics and/or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics and/or elements described in connection with other embodiments, unless expressly stated otherwise, as would be apparent to one skilled in the art. Accordingly, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the disclosure as set forth in the appended claims.

Claims

1. An optical network detection method, comprising:

and sending the detection optical signal to detect the optical network.

2. The method of optical network detection of claim 1 wherein shifting the OTDR baseband signal to a sideband location of the OSC baseband signal comprises:

shifting the OTDR baseband signal to a sideband location of the OSC baseband signal using a frequency source signal.

3. A method of optical network detection according to claim 1 or 2 in which combining the OTDR baseband frequency converted signal with the OSC baseband signal to generate an optical detection signal comprises:

adding the OTDR baseband frequency conversion signal and the OSC baseband signal to obtain an electric signal to be sent;

and modulating the electric signal to be transmitted onto an optical carrier to obtain the detection optical signal.

4. A method of optical network detection according to claim 1 or 2 in which combining the OTDR baseband frequency converted signal with the OSC baseband signal to generate an optical detection signal comprises:

modulating the OSC baseband signal to a first optical carrier to obtain an OSC optical signal;

modulating the OTDR baseband frequency conversion signal to a second optical carrier to obtain an OTDR optical signal;

and combining the OTDR optical signal and the OSC optical signal to obtain the detection optical signal.

5. Optical network detection method according to claim 1 or 2, wherein the OTDR baseband signal is a sequenced OTDR signal or a pulsed OTDR signal.

6. An optical network detection method, comprising:

and acquiring an OSC service signal according to the detection optical signal.

7. The optical network detection method of claim 6, wherein obtaining an OSC traffic signal from the detected optical signal comprises:

generating an OSC analog electric signal through low-pass filtering according to the detection optical signal;

and generating the OSC service signal according to the OSC analog electric signal.

8. A method of optical network detection according to claim 6 or 7 in which the OTDR baseband signal is a sequenced OTDR signal or an pulsed OTDR signal.

9. An optical network detection method, comprising:

receiving an optical detection signal sent by a local terminal, transmitting the generated backward optical signal in an optical fiber, wherein the optical detection signal carries an OSC baseband signal and an OTDR baseband signal shifted to a sideband position of the OSC baseband signal;

and acquiring an OTDR service signal according to the backward optical signal.

10. The optical network detection method of claim 9, wherein obtaining OTDR traffic signals from the backward optical signal comprises:

obtaining an OTDR backward signal according to the backward optical signal;

and acquiring the OTDR service signal according to the OTDR backward signal.

11. The optical network detection method of claim 10, wherein obtaining OTDR backward signals from the backward optical signal comprises:

performing photoelectric conversion and electric analog signal amplification processing on the backward optical signal to obtain an initial backward signal;

performing frequency conversion processing on the initial backward signal by using a frequency source signal so as to shift a signal component corresponding to the OTDR baseband signal in the initial backward signal to a zero-frequency position;

and acquiring a signal component corresponding to the OTDR baseband signal in the initial backward signal after frequency conversion processing through low-pass filtering to obtain the OTDR backward signal.

12. An optical network detection method according to any of claims 9 to 11, wherein the OTDR baseband signal is a sequence OTDR signal or a pulse OTDR signal.

13. An optical transceiver module comprising:

an optical sending module, configured to send a first optical detection signal, where the first optical detection signal carries a first OSC baseband signal and a first OTDR baseband signal frequency-shifted to a sideband location of the first OSC baseband signal;

14. The optical transceiver assembly of claim 13, wherein the optical transmission module comprises:

a first frequency conversion unit, configured to shift the frequency of the first OTDR baseband signal to a sideband position of the second OSC baseband signal, so as to obtain a first OTDR baseband frequency conversion signal;

a modulation unit, configured to combine the first OTDR baseband frequency converted signal and the first OSC baseband signal, generate and send the first optical detection signal.

15. The optical transceiver assembly of claim 14 wherein the first frequency conversion unit comprises a frequency source and a first multiplier, the first multiplier being connected to the frequency source and to OTDR inputs of the optical transceiver assembly;

the frequency source is used for providing a frequency source signal;

the first multiplier is configured to shift the first OTDR baseband signal input from the OTDR input end to a sideband position of the OSC baseband signal by using the frequency source signal, and output the first OTDR baseband frequency converted signal.

16. The optical transceiver assembly of claim 15 wherein the first frequency conversion unit further comprises an electrical power divider connected between the frequency source and the first multiplier and between the frequency source and a second multiplier in the second optical receiver module; the electrical divider is used for providing the frequency source signal to the first multiplier and the second multiplier respectively.

17. The optical transceiver assembly of claim 15 wherein the frequency of the frequency source signal is 2 times the bandwidth of the OSC baseband signal.

18. The optical transceiver module of claim 15 wherein the modulation unit comprises an adder, a laser, and a modulator, the adder being coupled to an OSC input of the optical transceiver module and the first multiplier, and the modulator being coupled to the adder, the laser, and an optical output of the optical transceiver module;

the laser is used for providing an optical carrier;

the adder is configured to add the first OTDR baseband frequency conversion signal to the first OSC baseband signal input from the OSC input terminal, and output an electrical signal to be transmitted;

the modulator is used for modulating the electric signal to be transmitted onto the optical carrier and outputting the detection optical signal.

19. The optical transceiver assembly of claim 18, wherein the modulation unit further comprises a driver connected between the summer and the modulator; the driver is used for adjusting the amplitude of the electric signal to be sent according to the driving voltage of the modulator.

20. The optical transceiver assembly of claim 15 wherein the modulation unit comprises a laser, a first optical coupler, a second optical coupler, a first modulator, a second modulator; the first optical coupler is connected with the laser, the first modulator and the second modulator, the second optical coupler is connected with the first modulator, the second modulator and the optical output end of the optical transceiver module, the first modulator is connected with the OSC input end of the optical transceiver module, and the second modulator is connected with the first multiplier;

the laser is used for providing an optical carrier;

the first optical coupler is used for splitting the optical carrier, providing a first optical carrier to the first modulator and providing a second optical carrier to the second modulator;

the first modulator is configured to modulate the first OSC baseband signal input from the OSC input terminal onto the first optical carrier, so as to obtain an OSC optical signal;

the second modulator is configured to modulate the first OTDR baseband frequency conversion signal onto the second optical carrier to obtain an OTDR optical signal;

the second optical coupler is configured to combine the OTDR optical signal and the OSC optical signal, and output the optical detection signal.

21. The optical transceiver assembly of claim 20, wherein the modulation unit further comprises a first driver and a second driver; the first driver is connected between the OSC input terminal and the first modulator, and the second driver is connected between the first multiplier and the second modulator;

the first driver is to adjust an amplitude of the first OSC baseband signal according to a first modulator drive voltage;

and the second driver is used for adjusting the amplitude of the first OTDR baseband frequency conversion signal according to the driving voltage of the second modulator.

22. The optical transceiver component of any one of claims 13 to 21, wherein the first optical receiving module comprises a first photoelectric conversion unit, a first low-pass filter, a first signal processing unit; the first signal processing unit is connected with an OSC output end of the optical transceiver module, the first photoelectric conversion unit is connected with an optical input end of the optical transceiver module, and the first low-pass filter is connected between the first signal processing unit and the first photoelectric conversion unit;

the first photoelectric conversion unit is used for performing photoelectric conversion and electric analog signal amplification processing on the second detection optical signal to obtain an initial analog electric signal;

the first low-pass filter is used for acquiring an OSC analog electric signal from the initial analog signal through low-pass filtering;

the first signal processing unit is configured to filter, sample, and perform criterion processing on the OSC analog signal to obtain the OSC service signal.

23. The optical transceiver module of claim 22 wherein the optical input of the optical transceiver module and the optical output of the optical transceiver module are the same port; the wavelength of the first detection optical signal is different from the wavelength of the second detection optical signal.

24. The optical transceiver assembly of any one of claims 13 to 21, wherein the second optical receiving module comprises:

the second frequency conversion unit is used for acquiring an OTDR backward signal according to the backward optical signal;

and the second signal processing unit is used for acquiring the OTDR service signal according to the OTDR backward signal.

25. The optical transceiver assembly of claim 24, wherein the second frequency conversion unit comprises a second optical-to-electrical conversion unit, a second multiplier, a second low-pass filter; the second photoelectric conversion unit is connected between the second multiplier and the optical output end of the optical transceiving component, and the second low-pass filter is connected between the second multiplier and the second signal processing unit; the second multiplier is connected with a frequency source in the optical sending module through an electric power divider in the optical sending module;

the second photoelectric conversion unit is used for performing photoelectric conversion and electric analog signal amplification processing on the backward optical signal to obtain an initial backward signal;

the second multiplier is configured to perform frequency conversion processing on the initial backward signal by using a frequency source signal provided by the electrical power divider through the frequency, so as to shift a signal component corresponding to the OTDR baseband signal in the initial backward signal to a zero-frequency position;

the second low-pass filter is used for obtaining a signal component corresponding to the OTDR baseband signal in the initial backward signal after the frequency conversion processing through low-pass filtering to obtain the OTDR backward signal.

26. The optical transceiver module of claim 25, wherein the second signal processing unit is connected to an OTDR output end of the optical transceiver module, and the second signal processing unit is configured to perform filtering, analog-to-digital conversion sampling, and arithmetic processing on the OTDR backward signal to obtain the OTDR service signal.

27. The optical transceiver assembly of any one of claims 13 to 21, wherein the optical transceiver assembly further comprises a combiner-splitter connected between the optical transmitting module and an optical output of the optical transceiver assembly, and between the second optical receiving module and the optical output; the combiner-splitter is configured to transmit a first detection optical signal through the optical output end, and receive the backward optical signal through the optical output end.

28. The optical transceiver module of claim 27 wherein the multiplexer-demultiplexer is further connected between the first optical receiving module and the optical input of the optical transceiver module; the combiner-splitter is further configured to receive the second detected optical signal through the optical input;

the optical transceiver component further comprises an optical splitter, and the optical splitter is connected between the multiplexer/demultiplexer and the first optical receiving module and between the multiplexer/demultiplexer and the second optical receiving module; the optical splitter is used for transmitting the second detection optical signal to the first optical receiving module according to wavelength and transmitting the backward optical signal to the second optical receiving module;

wherein the optical input end and the optical output end are the same port; the first detection optical signal has a wavelength different from the second detection optical signal and the backward optical signal.

29. The optical transceiver assembly of any of claims 13 to 21, wherein the first OTDR baseband signal, the second OTDR baseband signal are a sequence OTDR signal or a pulse OTDR signal.

30. An optical network device comprising an optical transceiver assembly as claimed in any one of claims 13 to 29.