CN118138122A

CN118138122A - Identification device, optical transmission network communication board card and optical fiber test system

Info

Publication number: CN118138122A
Application number: CN202410294057.0A
Authority: CN
Inventors: 彭肖; 杨程
Original assignee: Raisecom Technology Co Ltd
Current assignee: Raisecom Technology Co Ltd
Filing date: 2024-03-14
Publication date: 2024-06-04

Abstract

An identification device, an optical transmission network communication board card and an optical fiber test system, wherein the identification device is connected with monitoring optical ports of one or more optical transmission network communication board cards, each of the monitoring optical ports is connected with one communication port of a detection board card provided with an optical time domain reflectometer OTDR, and the identification device comprises: the transmission module is used for transmitting an identification signal between the monitoring optical port and the communication port, wherein the identification signal is an optical signal with a preset target wavelength; the recording module is used for recording a target monitoring optical port corresponding to the optical transmission network communication board card and a target communication port corresponding to the detection board card of the same identification signal when the identification signal is successfully transmitted; and the control module is used for determining the corresponding relation between the optical transmission network communication board card and the communication port of the detection board card according to the target communication port and the target monitoring optical port corresponding to the same identification signal. The test system can be used for wavelength division multiplexing WDM and optical transport network OTN.

Description

Identification device, optical transmission network communication board card and optical fiber test system

Technical Field

The present disclosure relates to optical communication technologies, and in particular, to an identification device, an optical transmission network communication board card, and an optical fiber testing system.

Background

In a single-fiber bi-directional optical transmission network, receiving and transmitting bi-directional operations are performed simultaneously using different wavelengths in one communication fiber. Compared with a double-fiber bidirectional optical transmission network, the single-fiber bidirectional optical transmission network receives and transmits signals in the same optical fiber, so that the time delay difference caused by receiving and transmitting different optical fibers is avoided, and meanwhile, the problem of misconnection of a receiving and transmitting interface is also solved. Therefore, the single-fiber bidirectional optical transmission network has good application prospect.

When a communication Optical fiber of a single-fiber bidirectional Optical transmission network fails, an Optical Time-domain reflectometer (Optical Time-Domain Reflectometer, OTDR) needs to be used for detecting the failure point online. The OTDR is a common test tool in optical cable construction and maintenance work, and can rapidly locate an optical fiber fault point. The method has the advantages of non-destructive, single-ended access only, visual and quick. The OTDR device generally has a plurality of channel ports, and is respectively connected to a plurality of single-fiber bidirectional optical transmission network communication boards. When fault detection is performed, a channel port corresponding to the fault board card needs to be opened, and a Monitor (MON) optical port of the fault board card is accessed for detection.

In the prior art, when the communication optical fiber fails, the communication optical fiber needs to be manually used on site for detection, investigation and confirmation. When the network management is adopted to control the OTDR to detect the optical fiber faults on line, the corresponding relation between the optical fiber and the monitoring optical port of the communication board card is firstly confirmed manually, the connection relation between the fault communication optical fiber and the communication port used by the OTDR is further confirmed, and then the port corresponding to the OTDR board card is opened by using the controller to detect the fault optical fiber. When the number of optical fibers and the number of communication boards are more, the time for checking and confirming is longer, the efficiency is low, the usability is poor, and the maintenance cost is high.

Disclosure of Invention

The embodiment of the application provides an identification device, an optical transmission network communication board card and an optical fiber test system.

An identification device connected to a monitoring optical port of one or more optical transmission network communication boards, wherein each of the monitoring optical ports is connected to a communication port of a detection board provided with an optical time domain reflectometer OTDR, wherein the identification device comprises:

The transmission module is used for transmitting an identification signal between the monitoring optical port and the communication port, wherein the identification signal is an optical signal with a preset target wavelength;

The recording module is used for recording a target monitoring optical port corresponding to the optical transmission network communication board card and a target communication port corresponding to the detection board card of the same identification signal when the identification signal is successfully transmitted;

and the control module is used for determining the corresponding relation between the optical transmission network communication board card and the communication port of the detection board card according to the target communication port and the target monitoring optical port corresponding to the same identification signal.

An optical transmission network communication board card connected to a test board card provided with an OTDR, wherein the optical transmission network communication board card comprises:

the line optical port is connected with the communication optical fiber;

The monitoring optical port is connected with the communication port;

The identification device is connected with the monitoring light port;

And the signal transmission device is connected with the line optical port and the monitoring optical port and is used for transmitting test signals of the OTDR, wherein the test signals are used for testing whether the communication optical fiber fails or not.

An optical fiber testing system, comprising the optical transmission network communication board, a signal generating device and a detection board provided with an OTDR, wherein:

the signal generating device is connected with the optical transmission network communication board card and is used for outputting a test signal.

The embodiment of the application can automatically determine the one-to-one correspondence among the communication optical fiber, the line optical port, the monitoring optical port and the communication port, does not need to manually confirm the correspondence between the communication optical fiber and the monitoring optical port of the communication board card and the connection relationship between the fault communication optical fiber and the communication port used by the OTDR, simplifies the test operation of fault optical fiber detection and improves the test efficiency of the fault optical fiber.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide an understanding of the principles of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the principles of the application.

FIG. 1 is a schematic diagram of a fiber test system;

fig. 2 is a schematic structural diagram of an identification device according to an embodiment of the present application;

FIG. 3 is another schematic diagram of the identification device shown in FIG. 2;

fig. 4 is a schematic structural diagram of an optical transmission network communication board card according to an embodiment of the present application;

fig. 5A is another schematic structural diagram of the transport network communication board shown in fig. 4;

Fig. 5B is a schematic diagram of another structure of the transport network communication board shown in fig. 4;

FIG. 6 is a schematic diagram of an optical fiber testing system according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a test card in the optical fiber test system of FIG. 6;

FIG. 8 is a schematic diagram of a switch circuit in the test card of FIG. 7;

FIG. 9 is a schematic diagram of an application structure of the test card shown in FIG. 8;

Fig. 10 is an application schematic diagram of an optical fiber testing system according to an embodiment of the present application.

Detailed Description

The present application has been described in terms of several embodiments, but the description is illustrative and not restrictive, and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the described embodiments. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features and elements of the present application may also be combined with any conventional features or elements to form a unique inventive arrangement. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement. It is therefore to be understood that any of the features shown and/or discussed in the present application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.

Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

FIG. 1 is a schematic diagram of a fiber testing system. As shown in fig. 1, the optical fiber test system shown in fig. 1 includes an optical transmission network communication board card and a test board card provided with an OTDR, where the test board card is provided with 8 communication ports, and each communication port may be connected to one optical transmission network communication board card. The optical transmission network communication board card is provided with a line optical port and monitoring optical ports, wherein the line optical port is connected with the communication optical fiber, and each monitoring optical port is connected with one communication port of the detection board card.

In the optical fiber test system shown in fig. 1, it is first required to manually confirm the correspondence between the communication optical fiber and the monitoring optical port of the optical transmission network communication board card, further confirm the connection between the fault communication optical fiber and the communication port used by the OTDR, and then use the controller to open the communication port corresponding to the OTDR board card to perform fault optical fiber detection.

Aiming at the optical fiber test system shown in fig. 1, the embodiment of the application provides an identification device which can automatically determine the one-to-one correspondence among a communication optical fiber, a line optical port, a monitoring optical port and a communication port.

Fig. 2 is a schematic structural diagram of an identification device according to an embodiment of the present application. As shown in fig. 2, the identification device is connected to a monitoring optical port of one or more optical transmission network communication boards, where each monitoring optical port is connected to one communication port of a detection board provided with an OTDR.

When the identification device is connected with a monitoring optical port of one optical transmission network communication board card, the identification device can determine the corresponding relation between the optical transmission network communication board card corresponding to the connected monitoring optical port and the communication port in the detection board card; similarly, when the identification device is connected with the monitoring optical ports of the N optical transmission network communication boards, the identification device can determine the corresponding relationship between the optical transmission network communication board corresponding to each connected monitoring optical port and the communication port in the detection board, where N is an integer greater than or equal to 2.

The identification device comprises a transmission module, a recording module and a control module, wherein:

The transmission module is used for transmitting an identification signal between the monitoring optical port and the communication port, wherein the identification signal is an optical signal with a preset target wavelength.

In an exemplary embodiment, the target wavelength is mutually exclusive to the wavelength supported by the OTDR. For example, when the wavelength supported by the OTDR is 1625nm, the target wavelength may be any one of 1271nm to 1611nm, such as 1591nm, so as to reduce the interaction of the optical signals between the correspondence determination process and the optical fiber testing process.

When the identification device is connected with a monitoring optical port, the transmission module can transmit optical signals with target wavelengths;

when the identification device is connected with the N monitoring light ports, and the corresponding relation of the N monitoring light ports is determined, the N optical signals with different target wavelengths can be transmitted simultaneously, or the optical signals with the same target wavelength can be transmitted at intervals, wherein N is an integer less than or equal to N.

The recording module is connected with the transmission module and is used for recording a target monitoring optical port corresponding to the optical transmission network communication board card and a target communication port corresponding to the detection board card of the same identification signal when the identification signal is successfully transmitted;

When the identification device is connected with a monitoring optical port, if the identification signal is successfully transmitted, the corresponding relationship exists between the communication port connected with the identification device and the monitoring optical port; otherwise, the communication port connected with the identification device and the monitoring optical port have no corresponding relation.

When the identification device is connected with N monitoring optical ports, if the identification signal corresponding to any monitoring optical port is successfully transmitted, the corresponding relationship exists between the communication port connected with the identification device and the monitoring optical port; otherwise, the communication port connected with the identification device and the monitoring optical port have no corresponding relation.

And the control module is connected with the recording module and is used for determining the corresponding relation between the optical transmission network communication board card and the communication port of the detection board card according to the target communication port and the target monitoring optical port corresponding to the same identification signal.

In one implementation manner, when the transmission module is connected with the detection board through a monitoring optical port, if the transmission module successfully transmits the identification signal, the recording module can obtain that the monitoring optical port has a corresponding relation with the communication port, and because one monitoring optical port has a corresponding relation with a line optical port belonging to the same optical transmission network board, and the communication optical fiber connected with the line optical port has a corresponding relation with the line optical port, the one-to-one correspondence relation among the communication optical fiber, the line optical port, the monitoring optical port and the communication port can be automatically determined.

In another implementation manner, when the transmission module is connected with the detection board card through the N monitoring optical ports, and the transmission module successfully transmits the identification signal between the a-th monitoring optical port and the b-th communication port, the recording module can obtain that the a-th monitoring optical port and the b-th communication port have a corresponding relationship, wherein a and b are positive integers less than or equal to N. Because a monitoring optical port has a corresponding relation with a line optical port belonging to the same optical transmission network board card, and the communication optical fiber connected with the line optical port has a corresponding relation with the line optical port, the one-to-one corresponding relation among the communication optical fiber, the line optical port, the monitoring optical port and the communication port can be automatically determined.

The identification device provided by the embodiment of the application can automatically determine the one-to-one correspondence among the communication optical fiber, the line optical port, the monitoring optical port and the communication port, does not need to manually confirm the correspondence between the communication optical fiber and the monitoring optical port of the communication board card and the connection relationship between the fault communication optical fiber and the communication port used by the OTDR, simplifies the test operation of fault optical fiber detection, and improves the test efficiency of the fault optical fiber.

Fig. 3 is a schematic diagram of another structure of the identification device shown in fig. 2. As shown in fig. 3, the transmission module includes:

the processing unit is used for dividing the identification signal into two paths of branch signals;

the first transmission unit is connected with the processing unit and the recording module and is used for transmitting a branch signal between the detection board card and the communication optical fiber;

The second transmission unit is connected with the processing unit and is used for outputting the other branch signal;

the control module includes:

The power detector is connected with the second transmission unit and is used for detecting the power of the other branch signal to obtain a power value;

And the comparison unit is connected with the power detector and is used for outputting the corresponding relation when the power value is larger than a preset threshold value.

In an exemplary embodiment, the processing unit is a wavelength division multiplexing filter corresponding to the target wavelength, so as to divide the optical signal of the target wavelength into two optical signals.

The identification device provided by the embodiment of the application can automatically determine the one-to-one correspondence among the communication optical fiber, the line optical port, the monitoring optical port and the communication port, does not need to manually confirm the correspondence between the communication optical fiber and the monitoring optical port of the communication board card and the connection relationship between the fault communication optical fiber and the communication port used by the OTDR, simplifies the test operation of fault optical fiber detection, and improves the test efficiency of the fault optical fiber. In addition, when the power value is greater than the threshold value, the corresponding relation is output, so that the accuracy of determining the corresponding relation can be improved, and misjudgment of the corresponding relation is avoided.

In an exemplary embodiment, the identification signal is an optical signal received by the monitoring optical port, and the identification device is located on the optical transmission network communication board card, so that the design structure of the optical transmission network communication board card is simplified, and the hardware cost is reduced.

Fig. 4 is a schematic structural diagram of an optical transmission network communication board card according to an embodiment of the present application. As shown in fig. 4, the optical transmission network communication board is connected with a detection board provided with an OTDR, where the optical transmission network communication board includes:

the line optical port is connected with the communication optical fiber;

The monitoring optical port is connected with the communication port;

The identification device is connected with the monitoring light port;

In the optical transmission network communication board card shown in fig. 4, the signal transmission device and the identification device are both connected with the communication optical fiber by using the line optical port, and are both connected with the detection board card by using the monitoring optical port, so that the design structure of the optical transmission network communication board card is simplified, and the hardware cost is reduced.

The optical transmission network communication board card provided by the embodiment of the application utilizes the identification device to determine the one-to-one correspondence among the communication optical fiber, the line optical port, the monitoring optical port and the communication port, and outputs the correspondence, so that the fault test of the communication optical fiber can be carried out by the signal transmission device according to the test signal generated based on the correspondence, the process of manually confirming the correspondence is reduced, the test operation of fault optical fiber detection is simplified, and the test efficiency of the fault optical fiber is improved.

In one implementation, when the line optical port is one, the signal transmission device includes a wavelength division multiplexing filter corresponding to a wavelength supported by the OTDR.

In the present application, the wavelength division multiplexing filter having a wavelength of 1625nm may be simply referred to as a 1625 filter, and the wavelength division multiplexing filter having a wavelength of 1591nm may be simply referred to as a 1591 filter.

Taking the wavelength supported by the OTDR as 1591nm and the target wavelength as 1625nm as an example, the following description will be given:

Fig. 5A is another schematic structural diagram of the transport network communication board shown in fig. 4. As shown in fig. 5A, the customer optical port is connected to the local service optical signal, and the line optical port is connected to the remote service optical signal through an optical fiber. The 1625 filter combines/demultiplexes the OTDR signal at 1625nm wavelength from the 1591 filter with the traffic optical signal. The 1591 filter splits the 1591nm wavelength from the monitoring port into power detectors and splits the 1625nm wavelength from the monitoring port into 1625 filters.

The 1591nm wavelength is used for automatically finding the path of the optical fiber, and the 1625nm wavelength is used for detecting the fault of the optical fiber of the line by the OTDR. The wavelength used for the automatic optical fiber routing can be any value from 1271nm to 1611nm, mutual exclusion between the wavelength used for the automatic optical fiber routing and the OTDR working wavelength is ensured, confusion is avoided, and fault tolerance is improved.

In the configuration shown in fig. 5A, the identifying means comprises at least a 1591 filter and a power detector, and the signal transmitting means comprises at least a 1591 filter and a 1625 filter.

In another implementation manner, when the number of the line optical ports is two and the two line optical ports are used for connecting communication optical fibers which are primary and secondary, the signal transmission device comprises a first optical switch, wherein different states of the optical switch correspond to different communication optical fibers;

Fig. 5B is a schematic diagram of another structure of the transport network communication board shown in fig. 4. As shown in fig. 5B, the customer optical port is connected to the local service optical signal, the main line optical port is connected to the remote service optical signal through the main line communication optical fiber, and the standby line optical port is connected to the remote service optical signal through the standby line communication optical fiber.

The first optical switch is a 2x2 optical switch, and two connecting ends at one side of the first optical switch are respectively connected with a customer optical port and a 1591 filter; the two connection sections on the other side are respectively connected with the main line communication optical fiber and the standby line communication optical fiber, and can be used for connecting the 1625nm wavelength OTDR signal output by the 1591 filter to the main line optical fiber or the standby line optical fiber. The 1591 filter feeds the 1591nm wavelength component from the monitoring port to the power detector and the 1625nm wavelength component from the monitoring port to the 2x2 optical switch.

The 1591nm wavelength is used for optical fiber automatic routing, and the 1625nm wavelength is used for OTDR detection line optical fiber faults. The wavelength used for the automatic optical fiber routing can be any value from 1271nm to 1611nm, mutual exclusion between the wavelength used for the automatic optical fiber routing and the OTDR working wavelength is ensured, confusion is avoided, and fault tolerance is improved.

Line fiber faults are detected by controlling the state of the 2x2 optical switch. When the 2x2 optical switch is in a straight-through state, the OTDR is used for detecting the fault of the optical fiber of the standby line. When the 2x2 optical switch is in a crossed state, the OTDR is used for detecting the main line optical fiber fault.

In the configuration shown in fig. 5B, the identification means comprises at least a 1591nm filter and a power detector, and the signal transmission means comprises at least a 1591nm filter and a 2x2 optical switch.

Fig. 6 is a schematic structural diagram of an optical fiber testing system according to an embodiment of the present application. As shown in fig. 6, the optical fiber testing system includes the optical transmission network communication board, the signal generating device and the detection board provided with the OTDR, where:

The signal generating device is connected with the optical transmission network communication board card and is used for outputting an identification signal.

Specifically, the signal generating device may be connected to the optical transmission network communication board through a communication port of the detection board.

Furthermore, the signal generating device is integrated in the detection board card, so that the design structure of the optical fiber testing system is simplified, and the hardware cost is reduced.

FIG. 7 is a schematic diagram of a test card in the optical fiber test system of FIG. 6. As shown in fig. 7, the test board card has N communication ports, wherein the test board card is provided with an OTDR, a signal generating device, and a switching circuit; wherein:

an OTDR for transmitting test signals;

signal generating means for outputting an identification signal;

The switch circuit is provided with two first connecting ends and second connecting ends which are in one-to-one correspondence with the N communication ports of the detection board card, wherein one first connecting end is connected with the signal generating device, and the other first connecting end is connected with the OTDR and used for controlling one of the two first connecting ends and one of the N second connecting ends to be in a conducting state.

In the structure shown in fig. 7, when the switch circuit controls the first connection end connected with the signal generating device and any one of the second connection ends to be in a conducting state, the detection board card can output an identification signal through the communication port connected with the second connection end, so that the determination of the optical transmission network communication board card corresponding to the communication port is completed. When the switch circuit controls the first connecting end connected with the OTDR to be in a conducting state with any one of the second connecting ends, the detection board card can output a test signal through a communication port connected with the second connecting end, and fault detection of the communication optical fiber connected with the optical transmission network communication board card corresponding to the communication port is completed.

Fig. 8 is a schematic diagram of a switch circuit in the test board shown in fig. 7. As shown in fig. 8, the switching circuit includes:

The second optical switch is provided with N first switch ends and 1 second switch end, wherein the N first switch ends are connected with N communication ports in a one-to-one correspondence manner;

The signal processing unit is provided with two first communication ends and one second communication end, wherein one first communication end is connected with the signal generating device, the other first communication end is connected with the OTDR, and the second communication end is connected with the second switch end and is used for realizing the transmission of signals corresponding to the two first communication ends through the communication port.

The signal processing unit is used for completing the routing or the signal separation of the signals.

Wherein the signal processing unit comprises a third optical switch or filter circuit or coupler; wherein:

Wherein the third optical switch has two third switch ends and 1 fourth switch end;

The filter circuit comprises a filter corresponding to the wavelength supported by the OTDR and a filter corresponding to the target wavelength;

And the coupling end of the coupler is respectively connected with the signal generating device and the OTDR.

Fig. 9 is a schematic diagram of an application structure of the test board card shown in fig. 8. As shown in fig. 9, the signal generating device may be an optical transmitter module (TRANSMITTING OPTICAL SUB-Assembley, TOSA) for converting an electrical signal into an optical signal.

When the communication optical fiber is a single-fiber bidirectional optical fiber, the detection board card can simultaneously realize an automatic optical fiber path-finding detection function and an optical fiber rapid OTDR on-line monitoring function.

The detection board card is provided with 8 communication ports, is provided with an 8:1 optical switch, an OTDR with a wavelength of 1625nm and a TOSA with a wavelength of 1591nm, and can further comprise a 1591/1625 filter or one of a 1X2 optical switch or a 1:2 coupler. Wherein:

and the 8:1 optical switch completes automatic alternate detection of 8 paths of communication optical fibers, and can select which path of port the optical switch is connected with according to the received control signal.

1591/1625 Filter or 1X2 optical switch or 1:2 coupler: the multiplexing or routing of 1591nm wavelength and 1625nm wavelength is accomplished.

1591Nm TOSA:1591nm wavelength continuous light source can be controlled to be turned on and off according to the received control signal.

1625Nm OTDR: the function of the optical time domain reflectometer is completed, the optical fiber joint, the optical fiber attenuation, the optical fiber length and the like are measured on line, and the starting and stopping of the measurement can be controlled according to the received control signal.

Wherein, 1625nm OTDR includes: 1625nm pulsed light source (TX), photodetector (RX), directional coupler. Wherein the directional coupler transmits TX light outwards while splitting light reflected back from the external fiber to RX.

Optionally, the optical fiber testing system further includes:

The controller is connected with the optical transmission network communication board card, the detection board card and the signal generating device and is used for outputting a first control signal to the optical transmission network communication board card and the signal generating device, wherein the first control signal is used for acquiring the corresponding relation between the optical transmission network communication board card and the communication port of the detection board card; and after the corresponding relation is obtained, outputting a second control signal to the optical transmission network communication board card and the OTDR, wherein the second control signal is used for testing the communication optical fiber connected with the transmission network communication board card.

Fig. 10 is an application schematic diagram of an optical fiber testing system according to an embodiment of the present application. As shown in fig. 10, the optical fiber testing system includes a test board card, a controller and an optical transmission network communication board card, wherein the test board card is provided with an OTDR and a TOSA. Each optical transmission network communication board card is provided with an identification device, and is connected with a single-fiber bidirectional communication optical fiber. The optical fiber testing system can perform optical fiber automatic path finding operation and OTDR detection operation on single-fiber bidirectional communication optical fibers, and achieves the OTDR rapid detection function of a plurality of communication optical fibers.

The controller automatically polls 1 communication port of the open detection board card or simultaneously opens at least two communication ports, and simultaneously controls the TOSA to send optical signals corresponding to the identification signals to the single-fiber bidirectional optical transmission network communication board card connected with the communication ports;

the WDM filter in the communication board of the optical transmission network separates the optical signal corresponding to the identification signal, and the power detection device detects the power of the optical signal corresponding to the identification signal.

When the power value detected by the power detector exceeds a certain threshold value, the line optical port ID information of the optical transmission network communication board card where the power detector is positioned is sent to the controller.

The controller establishes a corresponding relation between the line optical port ID information of the optical transmission network communication board card and a communication port used by the OTDR equipment, and realizes the function of automatically searching paths of the optical fibers.

When a fault detection is required to be carried out on a certain optical fiber, the controller controls the communication port used by the OTDR equipment to open a corresponding monitoring optical port, and the OTDR is started to carry out fault positioning on the optical fiber.

Taking the test card shown in fig. 9 as an example, the following description will be given:

(1) The controller controls the 8:1 optical switch to sequentially send 1591nm wavelength continuous light sources to the 8 communication ports by utilizing the TOSA;

(2) The controller detects whether the monitoring optical ports of all the optical transmission network communication boards have optical input. If the communication port of a certain optical transmission network communication board card has optical input, the optical transmission network communication board card has optical fiber connection relation with the communication port of the detection board card. The controller stores the corresponding connection relation between the port and the optical fiber.

(3) The controller sequentially stores the corresponding connection relations of the 8 ports and the 8 optical fibers, and after the detection is completed, the controller controls the TOSA of the detection board card to be closed.

(4) When the optical transmission network communication board card detects that a certain optical fiber has faults, the controller connects the optical fiber with the OTDR of the detection board card according to the stored 8:1 optical switch of the corresponding connection relation controller 2.

In the implementation process, the 8 communication ports of the detection board are respectively connected with 8 optical transmission network communication boards, and each optical transmission network communication board corresponds to 1 optical fiber. The 8:1 optical switch of the detection board card sends 1591nm wavelength continuous light sources to the 8 communication ports in turn. Meanwhile, the controller detects whether 1591nm optical input exists in the monitoring optical ports of all the optical transmission network communication boards. If the monitoring optical port of a certain optical transmission network communication board card has 1591nm optical input, the optical transmission network communication board card and the communication port of the detection board card are in optical fiber connection relation. Because the line optical ports connected with the line optical fibers in the optical transmission network communication board card are in one-to-one relation with the monitoring optical ports, the controller can sequentially acquire and store the corresponding relation between 8 ports of the detection board card and the 8 line optical fibers, and after detection, the controller controls to close the 1591nm wavelength continuous light source of the detection board card.

When the optical transmission network communication board card detects that a certain optical fiber has faults, an 8:1 optical switch of the detection board card is connected with the communication optical fiber and the OTDR of the detection board card, the OTDR sends 1625nm optical pulses, and optical time domain reflection test is carried out on the optical fiber.

The optical fiber test system provided by the embodiment of the application can realize the optical fiber rapid OTDR on-line monitoring function through the optical fiber automatic path finding detection function, solves the problem that the pairing relation between the OTDR and a plurality of optical fibers cannot be automatically configured, solves the problem that the OTDR detection polling time is long because of the plurality of optical fibers, and shortens the OTDR detection time.

In the above-described exemplary embodiments, the number of optical switch paths, TOSA light source wavelength & number, OTDR light source wavelength are not limited to the illustrated examples.

The scheme provided by the embodiment of the application aims at the defects of optical fiber detection and fault positioning in the existing single-fiber bidirectional optical transmission network, TOSA is added on the detection board card, the identification device WDM and PD power detection are added on the optical transmission network communication board card, the mapping relation between the OTDR and the optical fibers of the multiple boards is automatically determined, the problem that the pairing relation between the OTDR and the optical fibers of the multiple boards cannot be automatically configured is solved, meanwhile, the problem that the OTDR detection time is longer due to manual confirmation of the pairing relation when the number of the optical fibers is large is solved, and the OTDR detection time is shortened. The method has the advantages of simple realization, automatic configuration, convenient management and maintenance and quick use of OTDR to locate the fault point of the line optical fiber. The usability is strong, and the maintenance cost is low.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term "computer storage media" includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

Claims

1. An identification device connected to monitoring ports of one or more optical transmission network communication boards, wherein each of said monitoring ports is connected to a communication port of a detection board provided with an optical time domain reflectometer OTDR, wherein said identification device comprises:

2. The identification device of claim 1, wherein the target wavelength is mutually exclusive of wavelengths supported by the OTDR.

3. The identification device of claim 1, wherein:

The transmission module includes:

The first transmission unit is used for transmitting a branch signal between the detection board card and the communication optical fiber;

the second transmission unit is used for outputting the other branch signal;

the control module includes:

the power detector is used for detecting the power of the other branch signal to obtain a power value;

And the comparison unit is used for outputting the corresponding relation when the power value is larger than a preset threshold value.

4. The apparatus according to claim 3, wherein the processing unit is a wavelength division multiplexing filter corresponding to the target wavelength.

5. The identification device of any one of claims 1 to 4, wherein the identification signal is an optical signal received by the monitoring optical port, and the identification device is located on the optical transmission network communication board.

6. An optical transmission network communication board card, connected to a test board card provided with an OTDR, wherein the optical transmission network communication board card comprises:

the line optical port is connected with the communication optical fiber;

The monitoring optical port is connected with the communication port;

the identification device of any one of claims 1 to 5, connected to the monitoring light port;

7. The optical transport network communication board card of claim 6, wherein:

When the number of the line optical ports is two and the two line optical ports are used for connecting communication optical fibers which are main and standby, the signal transmission device comprises a first optical switch, wherein different states of the optical switch correspond to different communication optical fibers;

When the line optical port is one, the signal transmission device comprises a wavelength division multiplexing filter corresponding to the wavelength supported by the OTDR.

8. An optical fiber testing system, comprising the optical transmission network communication board card of claim 6 or 7, a signal generating device, and a detection board card provided with OTDR, wherein:

9. The fiber optic test system of claim 8, wherein the signal generating device is integrated into the sensing board card.

10. The fiber optic test system of claim 9, wherein the sensing board further comprises:

The switch circuit is provided with two first connecting ends and second connecting ends which are in one-to-one correspondence with N communication ports of the detection board card, wherein one of the first connecting ends is connected with the signal generating device, the other first connecting end is connected with the OTDR and used for controlling one of the two first connecting ends and one of the N second connecting ends to be in a conducting state, and N is an integer greater than or equal to 2.

11. The fiber optic test system of claim 10, wherein the switching circuit comprises:

12. The fiber optic test system of claim 11, wherein the signal processing unit comprises a third optical switch or filter circuit or coupler; wherein:

13. The fiber optic testing system of any of claims 8-12, further comprising: