WO2023071009A1 - Optical switch apparatus and optical module test system - Google Patents

Abstract

An optical switch apparatus, comprising: a insertion box (100) having an opening, and a cover plate closing the opening, the cover plate closing the opening and the insertion box together forming a cavity; a backplate (104) located in the cavity, an inner wall of the insertion box (100) being provided with multiple insertion slots, the multiple insertion slots each being provided with a main control module (101) and a power supply module (105) in signal connection with the backplate (104), and an optical switch module (10) detachably connected to the backplate (104), the main control modules (101) monitoring states of the power supply module (105) and the optical switch module (10) by means of the backplate (104). The optical switch apparatus and the optical module test system can configure an input/output interface of the optical switch device according to a requirement, and can be applied to different application scenarios.

Description

Optical Switching Device and Optical Module Test System

cross reference

This application is based on the Chinese patent application with the application number "2021112433278" and the filing date is October 25, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference. Apply.

technical field

The embodiments of the present application relate to the technical field of optical communication, and in particular to an optical switch device and an optical module testing system.

Background technique

With the development of high-speed and high-bandwidth communication networks, communication equipment is also developing towards high integration. The port speed of optical modules of communication equipment is getting higher and higher, and the port density is also increasing.

In order to ensure the quality of the optical signal function part of the produced communication equipment, it is necessary to test various performance indicators of the optical signal. However, once the optical switch device used for testing has a fixed structure and a fixed number of input/output interfaces, it cannot meet the requirements of the optical signal. The requirement for the flexibility of the input/output interface can only be used in specific application scenarios.

Contents of the invention

The main purpose of the embodiments of the present application is to provide an optical switch device and an optical module testing system, which can configure input/output interfaces of the optical switch device according to requirements, and can be flexibly applied to different application scenarios.

In order to achieve the above purpose, an embodiment of the present application provides an optical switch device, comprising: a sub-box having an opening, and a cover plate closing the opening, the cover plate closing the opening and forming a cavity with the sub-box; The backplane located in the cavity, the inner wall of the plug-in box is provided with a plurality of slots, and the plurality of slots are respectively provided with a main control module and a power supply module connected to the backplane signal, and connected to the The optical switch module is detachably connected to the backplane, and the main control module monitors the states of the power supply module and the optical switch module through the backplane.

In order to achieve the above purpose, the embodiment of the present application also provides an optical module testing system, including: an optical module under test, a test instrument, and a plurality of optical switch devices including a front-inserted optical switch module and a rear-inserted optical switch module; A plurality of optical switch devices are connected in series, and a plurality of optical switch devices include a head-end optical switch device connected to the optical module under test, and a tail-end optical switch device connected to the test instrument; along the head-end optical switch device In the extending direction of the optical switch device at the tail end, the third optical fiber connection unit of the former optical switch device is connected to the first optical fiber connection unit of the latter optical switch device through a connection line for optical signal connection. so that the second input common port of the former optical switch device is optically connected to the first input common port of the latter optical switch device; and the first input common port of the former optical switch device The number of the two input common ports is the same as the number of the first input common ports of the latter optical switch device.

The optical switch device proposed by the present application includes a sub-box with an opening and a cover plate for closing the opening. The cover plate closes the opening and forms a cavity with the sub-box. The optical switch module is detachably connected to the backplane. Therefore, the optical switch module only needs to be inserted into the subrack along the slot to complete the configuration with the main control module, backplane and power module. The main control module can monitor the power supply through the backplane Status of the module and optical switch module. When in use, optical switch modules with different numbers of input/output interfaces can be configured according to the actual number of input/output interfaces, so as to be flexibly applicable to different application scenarios.

Description of drawings

One or more embodiments are exemplified by pictures in the accompanying drawings, and these exemplifications are not intended to limit the embodiments.

FIG. 1 is a schematic diagram of the internal structure of an embodiment of the optical switch device of the present application;

Fig. 2 is a schematic structural diagram of the main control module in the embodiment of the optical switch device of the present application;

3 is a schematic diagram of a front-inserted optical switch module in an embodiment of the optical switch device of the present application;

4 is a schematic diagram of the self-loopback connection of the front-inserted optical switch module in the embodiment of the optical switch device of the present application;

FIG. 5 is a schematic diagram of a rear-inserted optical switch module in an embodiment of the optical switch device of the present application;

Fig. 6 is an example diagram of an embodiment of the optical switch device of the present application;

7 is a schematic diagram of the connection of the optical switch matrix composed of the front-inserted optical switch module and the rear-inserted optical switch module in the embodiment of the optical switch device of the present application;

Fig. 8 is an example diagram of an embodiment of the optical module testing system of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present application, and the embodiments can be combined and referred to each other on the premise of no contradiction.

The embodiment of the present application provides an optical switch device, as shown in FIG. cavity; the backplane 104 located in the cavity, the inner wall of the subrack 100 is provided with a plurality of slots (not shown in the accompanying drawings), and the main control module 101 and the The power module 105 and the optical switch module 10 are detachably connected to the backplane 104 . The main control module 101 monitors the states of the power module 105 and the optical switch module 10 through the backplane 104 .

As shown in Figure 2, the main control module 101 includes a processor unit 201, a programmable logic unit 202, a communication interface unit 203 and a main control backplane interface unit 204, and the main control module 101 communicates information with the background through the communication interface unit 203 Interact and receive commands issued by the background; the processor unit 201 obtains the command requirements for processing and uses the communication interface unit 203 to return the result or status content to the background; the processor unit 201 can call the programmable The logic unit 202 performs data processing; the main control module 101 monitors the power supply module 105 and the optical switch module 10 through the main control backplane interface unit 204 . The power supply module 105 converts the external alternating current or direct current into the working power required by other modules in the door of the optical switch device.

The backplane 104 is installed in the subrack 100, and the backplane 104 realizes the mutual interconnection of the main control module 101, the power module 105 and the optical switch module 10 in the optical switch device. The main control module 101 and the power module 105 are fixedly or detachably connected to the backplane 104, and when connected to the backplane 104, the main control module 101 and the power module 105 can communicate with other modules on the backplane through the backplane. The optical switch module 10 is detachably connected to the backplane 104. Therefore, the optical switch module 10 only needs to be inserted into the subrack 100 along the slot to complete the configuration with the main control module, the backplane 104 and the power supply module 105. Moreover, when the optical switch module 10 is connected to the backplane 104 , it can communicate with other modules on the backplane through the backplane. The main control module 101 can monitor the status of the power supply module 105 and the optical switch module 10 through the backplane 104 . During use, optical switch modules 10 with different numbers of input/output interfaces can be configured according to the actual number of input/output interfaces, so as to be flexibly applicable to different application scenarios.

Optionally, as shown in FIG. 1 , a fan module 106 may also be provided in multiple slots. The fan module 106 is composed of a fan and a control unit to realize heat dissipation and have an automatic speed regulation function. Optionally, the backplane 104 may include multiple fixing slots, for example: a backplane 104 may be provided with a main control module 101 fixing slot, a power supply module 105 fixing slot, and one or more fan modules 106 fixing Slots, several optical switch modules 10 fixed slots, wherein the number of each fixed slot can be designed according to actual needs.

In one example, as shown in FIG. 3 , the optical switch module 10 includes at least one front-plug optical switch module 102 located on one side of the backplane 104; the front-plug optical switch module 102 includes a plurality of first optical switches, each first The optical switch includes: a first input common port and a first output common port, each of the first optical switch's first input common port and first output common port is connected with an optical fiber connector; it also includes: a plurality of optical fiber connectors The first optical fiber connection unit 302 and the second optical fiber connection unit 305 formed by fixed connection, the first input common port is located in the first optical fiber connection unit 302, the first output common port is located in the second optical fiber connection unit 305, the first optical fiber connection A side of the unit 302 that is not connected to the first input common port is exposed outside the subrack 100 .

Specifically, at least one front-plug optical switch module 102 is provided on one side of the backplane 104, and the front-plug optical switch module 102 includes a first optical switch array 301 composed of a plurality of first optical switches, and each first optical switch includes a first optical switch. An input common port and a first output common port, a first optical switch may be a 1*N optical switch, 1 means that the first optical switch includes a first input common port, and N means that the first optical switch includes N first outputs Ordinary port, where N is a positive integer. The front-plug optical switch module 102 includes m first optical switches, and the front-plug optical switch module 102 includes m first input common ports and m*N first output common ports in total, where m is a positive integer. Each first input common port in the front-plug optical switch module 102 is externally connected with an optical fiber connector, and each first output common port is externally connected with an optical fiber connector.

Optical fiber connector is a device for detachable (movable) connection between optical fiber and optical fiber. It precisely butts the two end faces of optical fiber so that the optical energy output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent. An optical fiber connector generally includes two ports, one port is inserted into the transmitting optical fiber, and the other port is inserted into the receiving optical fiber. The optical fiber connector at the end of the optical fiber can easily insert the optical fiber into the optical fiber connector or remove it from the optical fiber connector. In this embodiment, the front insertion optical switch module 102 also includes a first optical fiber connection unit 302 formed by fixed connection of a plurality of optical fiber connectors, and the m first input common ports are located in the ports of the optical fiber connectors of the first optical fiber connection unit 302 It also includes a second fiber optic connection unit 305 formed by a plurality of fiber optic connectors fixedly connected, and the m*N first output common ports are located in the ports of the fiber optic connectors of the second fiber optic connection unit 305 ; Wherein, the side of the first optical fiber connection unit 302 that is not connected to the first input common port is exposed outside the subrack 100, which is convenient for the tester to connect and test from the outside with a connecting line.

In this embodiment, the first optical fiber connection unit 302 or the second optical fiber connection unit 305 is placed at the required position according to actual needs, and an external connection line is used to connect the first optical fiber connection unit 302 and the second optical fiber connection unit 305 according to the test requirements. To apply to different application scenarios. For example: using an external connection line to interconnect a plurality of optical fiber connectors of the second optical fiber connection unit 305, and interconnecting the m*N first output common ports of the same front-plug optical switch module 102, can The self-loopback of the front-plug optical switch module 102 is realized. Another example: when there are multiple front-plug optical switch modules 102, an external connection line is used to connect the second optical fiber connection unit 305 of one front-plug optical switch module 102 and the second fiber connection unit 305 of another front-plug optical switch module 102 Compared with the current method of cascading using fused fibers, in this embodiment, both the first input common port and the first output common port are externally connected to optical fiber connectors, which can facilitate the realization of certain two optical fiber connectors. To be connected or disconnected, multiple front-plug optical switch modules 102 are cascaded using optical fiber connectors, so the cascading relationship is not fixed, and can be cascaded according to actual needs to realize optical switching devices with different topological structures. In short, the optical switch device of this embodiment has the characteristics of strong adaptability to application scenarios, strong scalability, etc., and can realize optical switch devices with different topological structures; and multiple idle optical switch devices can be disassembled and replaced according to the current application scenario. Optical switching devices reassembled to form new topologies for cost savings.

Optionally, as shown in FIG. 3 , the front-plug optical switch module 102 further includes a first optical switch control unit 303 and a first backplane interface unit 304, wherein the first backplane interface unit 304 is used for docking with the backplane 104 The detachable connection is realized; the first optical switch control unit 303 receives the switching command sent by the main control module 101 through the backplane 104 through the first backplane interface unit 304 to control the optical switch to switch. The first optical switch control unit 303 is connected to the first optical switch to control the switching of channels in the first optical switch, for example: suppose the first optical switch is a 1*2 optical switch, including 1 first input common port, The first output common port (No. 1 and No. 2), then the first optical switch includes 2 channels, one channel is from the first input common port to No. 1 first output common port, and the other channel is from the first input common port From the common port to the No. 2 first output common port, the switching between the two channels in the first optical switch can be realized by using the first optical switch control unit 303 . The first optical switch control unit 303 may include multiple first optical switch controllers, and each first optical switch controller may correspondingly control one or more first optical switches.

Optionally, the first optical fiber connection unit 302 and the second optical fiber connection unit 305 can be fixed on the panel of the subrack 100, and after the front optical switch module 102 is placed into the subrack 100, the first input common port is inserted and fixed In the first optical fiber connection unit 302 on the panel of the subrack 100 , insert the first output common port into the second optical fiber connection unit 305 fixed on the panel of the subrack 100 . Alternatively, the first optical fiber connection unit 302 is fixed on the panel of the subrack 100, and the second optical fiber connection unit 305 is integrated in the front optical switch module 102; when the second optical fiber connection unit 305 is integrated in the front optical switch module 102, it can Keeping the first output common port inserted into the second optical fiber connection unit 305, when taking the front optical switch module 102 out of the subrack 100, only need to pull out the first input common port inserted into the first optical fiber connection unit 302, There is no need to pull out the first common output port from the second optical fiber connection unit 305 .

Optionally, as shown in FIG. 3 , both the first optical fiber connection unit 302 and the second optical fiber connection unit 305 may be integrated into the front-plug optical switch module 102 . For example: both the first optical fiber connection unit 302 and the second optical fiber connection unit 305 are embedded on the surface panel of the front-plug optical switch module 102, and the side of the first optical fiber connection unit 302 that is not connected to the first input common port is exposed to the outside, the second The side of the second optical fiber connection unit 305 that is not connected to the first output common port is exposed to the outside, so as to facilitate the insertion of connecting wires from the outside of the front-plug optical switch module 102; or, a card slot is provided on the front-plug optical switch module 102, and the first optical fiber The connection unit 302 and the second fiber connection unit 305 are located in the card slot. When it is necessary to change the position of the first fiber connection unit 302 or the second fiber connection unit 305 in the subrack 100, the first fiber connection unit The optical fiber connection unit 305 is taken out from the card slot; when the front optical switch module 102 needs to be taken out from the subrack 100, the first optical fiber connection unit 302 and the second optical fiber connection unit 305 can be replaced in the card slot. In this way, when the optical switch device is disassembled and assembled, it is only necessary to take out the front optical switch module 102 from the subrack 100, without pulling out the first input common port from the first optical fiber connection unit 302, and connecting the first The output common port is extracted from the second optical fiber connection unit 305; and it is not necessary to connect the first input common port and the first output common port with the optical fiber connector in the new subrack 100, providing for the disassembly/assembly of the optical switch device convenient.

In another example, the second optical fiber connection unit 305 is provided with a connection line for connecting any two first output common ports, so as to realize the self-loopback of the front-plug optical switch module 102 .

In this embodiment, the second optical fiber connection unit 305 is provided with a connection line for connecting any two first output ordinary ports, which can form an optical switch module 10 with an internal loopback function, which can meet the requirements of the system under test in intelligent manufacturing. There are scenarios where ports need to be self-looped, ports are inter-looped, or ports are connected to instruments for testing at the same time.

An example of the front-plug optical switch module 102 that can realize the self-loopback function is given below:

As shown in Figure 4, the front-plug optical switch module 102 is composed of 12 1*2 first optical switches 701, and each first optical switch 701 includes a first input common port com port and two first output common ports (No. 1 and No. 2), including 12 first input common ports (com1-com12) and 24 first output common ports in total. 24 first output common ports are inserted into the second optical fiber connection unit 305 to form the first interface unit 702, and the first output common ports of the 12 first optical switches 701 are interconnected to realize two 2x4 with self-loopback function The optical switch matrix 703, wherein, 2 represents the number of output ports of an optical switch matrix 703 with a self-loopback function, and 4 represents the number of input ports of an optical switch matrix 703 with a self-loopback function. The first input public ports com1-com4, com7-com10 of the first optical switches 1-4, 7-10 are inserted into the first optical fiber connection unit 302 to form the second interface unit 704, com1-com4, com7-com10 are connected to the second interface unit The port numbers of the 704 are A1-A8. The first common ports com5-com6, com11-com12 of the first optical switches 5-6, 11-12 are inserted into the first optical fiber connection unit 302 to form the third interface unit 705, com5-com6, com11-com12 are connected to the third interface unit 705 The port numbers of the ports are B1~B4.

The connection relationship of each first output common port of a 2x4 optical switch matrix 703 with self-loopback function is as follows: No. 2 first output common port of No. 1 first optical switch is interconnected with common port 1 of No. 2 first optical switch , No. 1 first output common port of No. 1 first optical switch is interconnected with No. 1 first output common port of No. 5 first optical switch, No. 2 first output common port of No. 2 first optical switch is connected with No. 6 The No. 1 first output common port of the first optical switch is interconnected; the No. 1 first output common port of the No. 3 first optical switch is interconnected with the No. 2 first output common port of the No. 5 first optical switch; The No. 2 first output common port of an optical switch is interconnected with the No. 1 first output common port of the No. 4 first optical switch, and the No. 2 first output common port of the No. 4 optical switch is connected with the No. 2 first output common port of the No. 6 first optical switch. No. 1st output common port interconnection.

The connection relationship of each first output common port of another 2x4 optical switch matrix 703 with self-loopback function is as follows: No. 2 first output common port of No. 7 first optical switch and No. 1 first output port of No. 8 first optical switch The output common ports are interconnected, the No. 1 first output common port of the No. 7 first optical switch is interconnected with the No. 1 first output common port of the No. 11 first optical switch, and the No. 2 first output of the No. 8 first optical switch The common port is interconnected with the No. 1 first output common port of the No. 12 first optical switch, and the No. 1 first output common port of the No. 9 first optical switch is interconnected with the No. 2 first output common port of the No. 11 first optical switch. Connect, No. 2 first output common port of No. 9 first optical switch is interconnected with No. 1 first output common port of No. 10 first optical switch, No. 2 first output common port of No. 10 optical switch is connected with No. 12 No. The No. 2 first output common port of an optical switch is interconnected.

In practical applications, ports A1 and A2, A3 and A4, A5 and A6, A7 and A8 are required to be connected in pairs with the sending port Tx and receiving port Rx of the unit under test 601 respectively, and the ports B1 and B2, B3 and B4 are respectively It is docked with the receiving port Rx and the sending port Tx of the bit error tester. When the No. 1 first optical switch is switched to the channel from the first input common port to the No. 2 first output common port, and the No. 2 first optical switch is switched from the first input common port to the No. 1 first output common port, Realize the loopback of ports A1 and A2; when the No. 1 first optical switch is switched to the first input common port to No. 1 first output common port, the No. 2 first optical switch is switched to the first input common port to No. 2 When the first output common port, the No. 5 first optical switch is switched from the first input common port to the No. 1 first output common port, and the No. 6 first optical switch is switched from the first input common port to No. 1 first output common port , realize the interconnection between ports A1 to B1, and ports A2 to B2. Other configurations are similar and will not be repeated here.

In another example, as shown in FIG. 5 , the optical switch module 10 further includes: a rear optical switch module 103 that is detachably connected to the backplane 104 and is arranged opposite to the front optical switch module 102; The module 103 includes a plurality of second optical switches, each second optical switch includes: a second input common port and a second output common port, and the second input common port and the second output common port of each second optical switch are connected to There is an optical fiber connector; it also includes: a third optical fiber connection unit 402 formed by fixedly connecting a plurality of optical fiber connectors, the second input common port is located in the third optical fiber connection unit 402, and the third optical fiber connection unit 402 is not connected to the second One side of the input common port is exposed outside the optical switch device; the second output common port is optically connected to the first output common port in the second optical fiber connection unit 305 to realize the rear-plug optical switch module 103 and the front-plug optical switch module Optical signal connection between 102.

Specifically, as shown in FIG. 6 , at least one rear optical switch module 103 is provided on the other side of the backplane 104 , and the front optical switch module 102 and the rear optical switch module 103 are disposed opposite to each other. Referring to FIG. 5 , the rear-plug optical switch module 103 includes a second optical switch array 401 composed of n second optical switches. The second optical switch can be 1*M optical switches, and 1 indicates that the second optical switch includes a second input Common port, M means that the second optical switch includes M second output common ports, where M is a positive integer. The rear-plug optical switch module 103 totally includes n second input common ports and n*M second output common ports, wherein n is a positive integer. Each second input common port in the rear-plug optical switch module 103 is externally connected with an optical fiber connector, and each second output common port is externally connected with an optical fiber connector.

Optical fiber connector is a device for detachable (movable) connection between optical fiber and optical fiber. It precisely butts the two end faces of optical fiber so that the optical energy output by the transmitting optical fiber can be coupled to the receiving optical fiber to the maximum extent. An optical fiber connector generally includes two ports, one port is inserted into the transmitting optical fiber, and the other port is inserted into the receiving optical fiber. The optical fiber connector at the end of the optical fiber can easily insert the optical fiber into the optical fiber connector or remove it from the optical fiber connector. In this embodiment, the optical switch module 10 further includes a third optical fiber connection unit 402 formed by fixed connection of a plurality of optical fiber connectors, and the n second input common ports are located in the ports of the optical fiber connectors of the third optical fiber connection unit 402 . Wherein, the side of the third optical fiber connection unit 402 that is not connected to the second input common port is exposed outside the optical switch device, which is convenient for testers to connect and test from the outside with a connecting line.

The second output common port of the rear optical switch module 103 is connected with the first output common port of the front optical switch module 102 in the second optical fiber connection unit 305, so as to realize the rear optical switch module 103 and the front optical switch Optical signal connections between modules 102 . Compared with the current method of cascading using fused fibers, in this embodiment, the first output common port of the front-plug optical switch module 102 and the second output common port of the rear-plug optical switch module 103 are due to the cascading relationship It is not fixed, and can be cascaded according to actual needs to realize optical switch devices with different topological structures. In short, the optical switch device of this embodiment has the characteristics of strong adaptability to application scenarios, strong scalability, etc., and can realize optical switch devices with different topological structures; and multiple idle optical switch devices can be disassembled and replaced according to the current application scenario. Optical switching devices reassembled to form new topologies for cost savings.

Optionally, referring to FIG. 5 , the rear optical switch module 103 further includes a second optical switch control unit 403 and a second backplane interface unit 404, wherein the second backplane interface unit 404 is used for docking with the backplane 104 to implement Disconnect the connection; the second optical switch control unit 403 is connected to the second optical switch to control the switching of the second optical switch channel, for example: assuming that the second optical switch is a 1*2 optical switch, including a second input common port, 2 second output common ports (No. 1 and No. 2), then the second optical switch includes 2 channels, one channel is from the second input common port to No. 1 second output common port, and the other channel is from the No. From the two input common ports to the No. 2 second output common port, the second optical switch control unit 403 can be used to switch between the two channels in the second optical switch. The second optical switch control unit 403 may include multiple second optical switch controllers, and each second optical switch controller may correspondingly control one or more second optical switches.

Optionally, the third optical fiber connection unit 402 may be fixed on the panel of the subrack 100, and after the rear optical switch module 103 is placed into the subrack 100, the second input common port is inserted into the third optical fiber connection unit 402, Afterwards, the second common output port is correspondingly connected to the first common output port of the front-plug optical switch module 102 .

Optionally, the third optical fiber connection unit 402 is integrated into the rear optical switch module 103 . For example: the third optical fiber connection unit 402 is embedded on the panel of the rear optical switch module 103; or, a card slot is provided on the surface of the rear optical switch module 103, and the third optical fiber connection unit 402 is located in the card slot. When the three optical fiber connection unit 402 is in the position in the subrack 100, the third optical fiber connection unit 402 is taken out from the card slot; 402 is placed in the card slot again. In this way, when the optical switch device is disassembled and assembled, it is only necessary to take out the rear optical switch module 103 from the subrack 100, and it is not necessary to pull out the second input common port from the third optical fiber connection unit 402; The two input common ports are connected to the optical fiber connectors in the new subrack 100, which facilitates the disassembly/assembly of the optical switch device.

In one example, referring to FIG. 5 , the second output common port of the rear optical switch module 103 forms a second output common port unit 405 through a fixing device. The fixing device can be a flange, and the flange is provided with a plurality of holes, and the optical fiber connector of the second output common port is inserted into the holes to be fixed to form the second output common port unit 405 .

Optionally, the second output common port unit 405 may also be integrated into the rear optical switch module 103 . For example: the second output ordinary port unit 405 is embedded on the panel of the rear optical switch module 103; or, a card slot is provided on the surface of the rear optical switch module 103, and the second output common port unit 405 is located in the card slot. When changing the position of the second output common port unit 405 in the subrack 100, the second output common port unit 405 is taken out from the card slot; The two-output common port unit 405 is placed in the card slot again.

In one example, the first output common port of the front-plug optical switch module 102 is connected blindly with the second output common port in the second output common port unit 405 through the second optical fiber connection unit 305, so as to realize the rear-plug optical switch The optical signal connection between the module 103 and the front-plug optical switch module 102. In this embodiment, the number of front-inserted optical switch modules 102 can be multiple, and the number of rear-inserted optical switch modules 103 can also be multiple. Blind-mating and docking realizes optical signal connection.

Optionally, referring to FIG. 6 , a plurality of front-inserted optical switch modules 102 are arranged in a horizontal line, and a plurality of rear-inserted optical switch modules 103 are arranged in a vertical line; the first output common ports are arranged in an array on the second optical fiber connection unit 305 , the numbers of the first common output ports in each row are the same, and each column is composed of all the first common output ports of a first optical switch in numbered order; the second common output ports are arranged in an array in the second common output port unit 405, Each row is composed of all second output common ports of a second optical switch in sequence of numbers, and the numbers of the second output common ports of each row are the same. In this embodiment, when multiple front-inserted optical switch modules 102 are arranged in a horizontal line and multiple rear-inserted optical switch modules 103 are arranged in a vertical line, how to number them to achieve blind-mating and docking is given. In this way, in In actual use, the user only needs to insert the front optical switch module 102 horizontally and the rear optical switch module 103 vertically according to the sequence of numbers, and the operation is simple and convenient.

Specifically, the number of first optical switches in the front optical switch module 102 is the same as the number of second output common ports of a second optical switch in the rear optical switch module 103, and the number of second output common ports of a second optical switch in the front optical switch module 102 is the same. The number of the first output common ports of the second optical switch is the same as the number of the second optical switch in the rear optical switch module 103 . For example: the number of first optical switches in the front optical switch module 102 is 32, and they are all 1*8 optical switches, then the number of second optical switches in the rear optical switch module 103 is 8, and Both are 1*32 optical switches.

During cascading, the second common output ports of each second optical switch in the rear optical switch module 103 are respectively connected to the first common output ports of the same number of the first optical switches in all the front optical switch modules 102 . The number mentioned here is only relative to the number of the optical switch, and the first output common port of each first optical switch is assigned a number according to the number, for example, the first output common port of each 1*8 first optical switch The ports are numbered from 1 to 8. The second output common ports of each second optical switch are numbered according to the number, for example, the numbers of the second output common ports of each 1*32 second optical switch are 1-32.

For example: the second output common ports (1-32) of the No. 1 second optical switch in the rear-inserted optical switch module 103 are respectively connected to the No. 1 first output common ports of the first optical switches in all front-inserted optical switch modules 102, The second output common ports (1-32) of the second optical switch in the rear optical switch module 103 are respectively connected to the first output common ports of No. 2 of the first optical switches in all the front optical switch modules 102, so that analogy. In this embodiment, when a plurality of front-inserted optical switch modules 102 are arranged in a horizontal line, and a plurality of rear-inserted optical switch modules 103 are arranged in a vertical line, the first output common ports are arranged in an array on the second optical fiber connection unit 305, The rows of the array extend along the transverse direction, and the columns of the array extend along the vertical direction. The first output common ports of each row are numbered the same, and each column is composed of all the first output common ports of a first optical switch in sequence of numbers. The second output ordinary ports are arranged in an array in the second output ordinary port unit 405, the rows of the array extend along the horizontal direction, and the columns of the array extend along the vertical direction, and each row is composed of all the first output ordinary ports of a second optical switch The numbering sequence is composed, and the numbering of the second output common port of each column is the same. In this arrangement, when the spacing of the first output common ports arranged in the array of the second optical fiber connection unit 305 is the same as the spacing of the second output common ports arranged in the array of the second output common port unit 405, blindness can be realized. Plug butt.

An example of blind-mating and docking between multiple front-plug optical switch modules 102 and multiple rear-plug optical switch modules 103 to realize optical signal connection is given below, as shown in FIG. 7 :

Eight front-inserted optical switch modules 102 and four rear-inserted optical switch modules 103 are cascaded back and forth to realize an 8x32 optical switch matrix.

Wherein, a front-plug optical switch module 102 is composed of four 1*8 first optical switches 501, and the numbers of the four first input common ports (com1-com4) in the first optical fiber connection unit 302 are A1-A4; 4*8 first output ordinary ports form an array of 8 rows and 4 columns in the second optical fiber connection unit 305 shown in FIG. Arranged in order, the columns of the array are arranged in order by the numbers of the four first optical switches. The number of the 32 first output ordinary ports in a front-plug optical switch module 102 is x1_y1 (the number mentioned here is relative to a front-plug optical switch module 102), and x1 represents the first output of the first optical switch The port number of the common port, y1 represents the number of the first optical switch in the front-plug optical switch module 102 . For example: the number 1 of the first output common port of the first first optical switch OSW1 corresponds to 1_1, the corresponding port number of the first output common port of No. 2 is 2_1; the first output common port of the first optical switch OSW3 corresponds to The port number is 1_3, the port number corresponding to the first output common port No. 8 is 8_3, and the other port numbers are deduced by analogy.

The 8 front-inserted optical switch modules 102 include 32 first input common ports (A1-A32) and 8*32 first output common ports 502 in total, and the 8 front-inserted optical switch modules 102 are arranged in a horizontal line in the order of numbering. Now, 8*32 first output ordinary ports 502 form a total array of 8 rows and 32 columns, each port number in the total array is OSWABi_j, and the i value is the row of each first output ordinary port in the array, The j value is the column in the array for each first output common port. The number x1_y1 of the first output ordinary port in each front-plug optical switch module 102 has a corresponding relationship with the number OSWABi_j of each port in the total array, and the value of i is the same as the value of x1, indicating the port of the first output ordinary port in the first optical switch No.; the value of j needs to be converted with the value of y1, j=p*(the number of the current front-inserted optical switch module 102-1)+y1, wherein, p is the number of optical switches in a single front-inserted optical switch module 102, and the present embodiment is 4. For example: the port number in the total array of the first output ordinary port whose port number is 3_1 in the second pre-inserted optical switch module 102 is OSWAB3_5; the port number in the second pre-inserted optical switch module 102 is the first output of 3_3 The port number of the common port in the total array is OSWAB3_7; the port number of the first output common port whose port number is 3_1 in the sixth pre-inserted optical switch module 102 is OSWAB3_21 in the total array; the sixth pre-inserted optical switch module The port number of the first output common port with port number 3_3 in 102 in the total array is OSWAB3_23.

Wherein, a rear-plug optical switch module 103 is composed of two 1*32 second optical switches 503, and the numbers of the two second input common ports (com1-com2) in the third optical fiber connection unit 402 are B1-B2; 2*32 second output ordinary ports form an array of 2 rows and 32 columns through the fixing device. The rows of the array are arranged in order by the first output ordinary ports of the second optical switch No. 1 to No. 32, and the columns of the array are arranged by 2 The second optical switches are arranged in sequence by number. The number of the second output common port in a rear optical switch module 103 is x2_y2 (the number mentioned here is relative to a rear optical switch module 103), and x2 represents the second optical switch in the rear optical switch module 103 y2 represents the port number of the second output ordinary port in the second optical switch. For example: the first output common port No. 1 of the first second optical switch OSW1 corresponds to the number 1_1, and the first output common port No. 2 corresponds to the port number 1_2; the first output No. 1 of the second second optical switch OSW2 The port number corresponding to the common port is 2_1, the port number corresponding to the first output common port No. 8 is 2_8, and the other port numbers are deduced by analogy.

The 4 rear optical switch modules 103 include 8 second input common ports ( B1 - B8 ) and 8*32 second output common ports 504 in total. When the second output common port is integrated in the rear optical switch module 103, the four rear optical switch modules 103 are vertically arranged, and 8*32 second output common ports 504 of the four rear optical switch modules 103 form A total array of 8 rows and 32 columns, each port number in the total array is OSWBAi_j, the i value is the row of each second output ordinary port in the array, and the j value is the row of each second output ordinary port in the array column. The number x2_y2 of the second output common port in each rear-plug optical switch module 103 has a corresponding relationship with the number OSWBAi_j of each port in the total array, and the value of j is the same as the value of y2, indicating the second output common port of the second optical switch. Port number; the value of i needs to be converted with the value of x2, i=q*(the number of the optical switch module 103 at the current rear insertion-1)+x2, wherein, q is the number of optical switches in the optical switch module 103 of the rear insertion, the present embodiment for 2.

Finally, a total array of 8 rows and 32 columns formed by the first output common ports in the 8 front-plug optical switch modules 102 and a total array formed by the second output common ports in the 4 rear-plug optical switch modules 103 The 8-row and 32-column array is directly blind-mated and docked to realize the interconnection of two ports whose port numbers are OSWABi_j and OSWBAi_j respectively, forming an 8x32 optical switch matrix with 32 A ports and 8 B ports.

Optionally, a plurality of front-inserted optical switch modules 102 can be arranged in a vertical line, and a plurality of rear-inserted optical switch modules 103 can be arranged in a horizontal line; the first output common ports are arranged in an array on the second optical fiber connection unit 305, A row is composed of all the first output common ports of a first optical switch in numbered order, and the numbers of the first output common ports of each column are the same; the second output common ports are arranged in an array of the second output common port unit 405, and each row The numbers of the second output common ports of the optical switches are the same, and each column is composed of all the first output common ports of a second optical switch in sequence of numbers. Here, referring to the specific realization of the above-mentioned "a plurality of front-inserted optical switch modules 102 arranged horizontally in a line, and a plurality of rear-inserted optical switch modules 103 vertically arranged in a line", the front-inserted optical switch module 102 and the rear-inserted optical switch module The arrangement manner of 103 can be interchanged, which will not be described in detail in this embodiment.

The above content specifically describes each unit in the optical switch device, and a specific example of a flexibly configured optical switch device is given below for easy understanding, as shown in Figure 6:

In this example, the optical switch device with flexible configuration adopts a box-type modular structure. The backplane 104 is installed in the middle of the box 100, and the box 100 is divided into two parts, the front and the back. The backplane 104 includes multiple fixed slots. The main control module One fixed slot for 101, one or two fixed slots for power module 105 and one or two fixed slots for fan module 106. The number of fixed slots depends on the heat dissipation requirements of the device. 103 fixed slots each several.

In this example, the power supply module 105, the main control module 101, and n front optical switch modules 102 are arranged in a horizontal line and fixed on the front side of the backplane 104, and the m rear optical switch modules 103 are vertically arranged in a line and fixed on the backplane 104. On the rear side, the fan module 106 is also fixed on the rear side of the backplane 104 . The subrack 100 is provided with front slots and rear slots, the front slots are vertical slots, and the rear slots are horizontal slots. Each module located on the front side of the backplane 104 can be inserted into the subrack 100 along the front slots and the backplane. 104 connection, each module located at the rear side of the backplane 104 can be inserted into the subrack 100 along the rear slot and connected with the backplane 104 . The backplane 104 implements the interconnection between the main control module 101 , the front optical switch module 102 , the rear optical switch module 103 , the power module 105 , and the fan module 106 in the device.

Wherein, specifically referring to FIG. 2 , the main control module 101 includes a processor unit 201, a programmable logic unit 202, a communication interface unit 203 and a main control backplane interface unit 204, and the main control module 101 realizes information interaction with the background through the communication interface unit 203 , and receive the command issued by the background; the processor unit 201 obtains the command request to process and returns the result or status content to the background by using the communication interface unit 203; the processor unit 201 can call the programmable logic as required when processing according to the command requirement The unit 202 performs data processing; the main control module 101 monitors the power supply module 105 , the fan module 106 , the front optical switch module 102 , and the rear optical switch module 103 through the main control backplane interface unit 204 . The power supply module 105 converts the external alternating current or direct current into the working power required by other modules in the door of the optical switch device. The fan module 106 is composed of a fan and a control unit, realizes a heat dissipation function, and has an automatic speed regulation function.

The interface signals between each module and the backplane 104 include one or more of the signals used for the interconnection of the backplane 104 such as power signals, IO signals, I2C signals, RS485 signals, and Ethernet signals. The signals of the communication interface unit 203 of the main control module 101 include Ethernet signals, I2C signals, RS485 signals, etc. The communication interface unit 203 is used for communication with the background and communication between modules in the device.

The backplane 104 leaves space to realize the docking between the front optical switch module 102 and the rear optical switch module 103 through a special-shaped plate (for example: L-shaped) or a hollowed out method, and the second optical fiber connection unit of the front optical switch module 102 305 is docked with the second output common port unit 405 of the rear optical switch module 103 to jointly form a docking unit.

Wherein, the front-plug optical switch module 102, as shown in FIG. 3 , includes: a first optical switch array 301, a first optical switch control unit 303, and a first backplane interface unit 304; The first optical fiber connection unit 302 and the second optical fiber connection unit 305 of the switch module 102 . Each first common input port of the first optical switch array 301 is externally connected with an optical fiber connector, and inserted into the first optical fiber connection unit 302; the first output common port of the first optical switch array 301 is externally connected with an optical fiber connector, and inserted into the second Inside the fiber optic connection unit 305 . The first optical fiber connection unit 302 is usually placed on the panel of the front optical switch module 102, and the second optical fiber connection unit 305 can be placed in different places according to the functions of the front optical switch module 102 in the device. When the front optical switch module 102 is used as a multi-channel one-to-many optical switch, the second optical fiber connection unit 305 and the first optical fiber connection unit 302 can be placed on the front panel of the front optical switch module 102 for direct use by users. When the front optical switch module 102 is used to form an optical switch matrix with the rear optical switch module 103 , the second optical fiber connection unit 305 is usually placed on the surface panel of the front optical switch module 102 or directly embedded in the backplane 104 .

Wherein, the rear optical switch module 103, as shown in Figure 5, includes: a second optical switch array 401, a second optical switch control unit 403, and a second backplane interface unit 404; the optical switch device also includes: The third optical fiber connection unit 402 and the second output common port unit 405 of the switch module 103 . The second output common port unit 405 does not include an optical fiber connector. The third optical fiber connection unit 402 is placed on the surface panel of the rear optical switch module 103 for direct use by users. Optionally, the third optical fiber connection unit 402 may pass through the backplane 104 and be fixed on the panel of the subrack 100 together with the first optical fiber connection unit 302 by means of coiling. The second output common port unit 405 can be placed on the panel on the surface of the rear optical switch module 103 or directly embedded in the backplane 104 , and the rear optical switch module 103 is inserted into the subrack 100 and directly docked with the front optical switch module 102 .

It should be noted here that when the second optical fiber connection unit 305 is embedded in the backplane 104, the second output common port unit 405 cannot be embedded in the backplane 104, but is directly connected to the second optical fiber connection unit 305 on the backplane 104; When the second output common port unit 405 is embedded in the backplane, the second optical fiber connection unit 305 cannot be embedded in the backplane 104 , and is directly connected to the second output common port unit 405 on the backplane 104 .

M=m*k in the second output ordinary port unit 405, wherein, m represents the number of 1*N first optical switches contained in a single front-plug optical switch module 102, and N is the number of front-plug optical switch modules 102 The number of first output common ports in a single first optical switch, k is the number of front-plug optical switch modules 102 inserted into the device. When m=M, k=N, a NxM optical switch matrix can be formed by a front-inserted optical switch module 102 and a rear-inserted optical switch module 103; when m<M, k<N, and M is a multiple of m , when N is a multiple of k, M/m front-mounted optical switch modules 102 and N/k rear-mounted optical switch modules 103 are required to form an NxM optical switch matrix, generally M≥N. For an optical switch matrix composed of one-level cascading of optical switches, the maximum value of M/N is determined by the n value of 1*n optical switch devices, and there is a maximum value M=N=n. For multi-stage optical switches In the optical switch matrix composed of cascade mode, the maximum value of M/N will increase geometrically with n as the base number, and the number of cascaded series is only limited by the size of the device and the insertion loss of the optical switch; multiple devices can also be used Carry out cascading to form an optical switch matrix with a larger switching capacity. For example, an 8x64 blocked optical switch matrix can be formed by using one optical switch matrix configured as 8x32 and one non-blocking optical switch matrix device configured as 16 pieces of 4x2 , the number of cascaded devices is only limited by the insertion loss data of each channel of the optical switch matrix system.

Optionally, the number of second optical switches in the second optical switch array 401 of the rear-inserting optical switch module 103 in the device can be increased, that is, the number of second optical switches in a single rear-inserting optical switch module 103 can be increased, thereby The number of rear optical switch modules 103 is reduced to reduce the number of rear slots in the subrack 100 and the number of fixed slots on the backplane 104 .

In this example, the backplane 104 is designed as a special-shaped board such as L-shaped, or provided with through holes, which reserve space for the connection and cascade connection of the front board optical switch module 102 and the rear board optical switch module 103 . When the second optical fiber connection unit 305 is placed on the panel of the front-plug optical switch module 102, and the second output common port unit 405 is placed on the panel of the rear-plug optical switch module 103, when the front-plug optical switch module 102 and After the rear board optical switch module 103 is installed, the second optical fiber connection unit 305 and the second output common port unit 405 are blind-mated at the opening of the backplane 104 to form, for example, the aforementioned NxM optical switch matrix. When the second optical fiber connection unit 305 is not integrated on the front panel of the optical switch module 102, and the second output common port unit 405 is not placed on the panel of the rear optical switch module 103, the second optical fiber connection unit 305 and the second output common port unit 405 are fixed at the opening of the backplane 104 to realize connection and cascading, forming, for example, the aforementioned NxM optical switch matrix.

The foregoing example is only for illustration, and does not constitute a limitation to the optical switch device of this embodiment. In practical applications, according to the needs of the application scenario, a single front-inserted optical switch module 102, a single rear-inserted optical switch module 103, or both front-inserted optical switch module 102 and rear-inserted optical switch module 103 can be used to combine the required Optical switch devices, such as: multi-channel 1*N optical switch, NxM optical switch matrix, optical switch array with loopback function, etc. In addition, this device also has strong scalability, and various A variety of extended function modules, such as: multi-channel variable optical attenuator (Variable Optical Attenuator, VOA) or optical power meter (Optical Power Meter, OPM), etc.

The embodiment of the present application has the following advantages:

(1) Using a multi-slot plug-in module structure, the front optical switch module 102 and the rear optical switch module 103 are respectively arranged on both sides of the backplane 104, and the first output common port of the front optical switch module 102 and the rear The second output ordinary port of the plug-in optical switch module 103 realizes docking and cascading in the subrack 100, ensuring that there is no butt joint optical fiber between the first output common port and the second output common port outside the subrack 100, so that the production and installation of the device , Use and maintenance are very convenient.

(2) Each first input common port and each first output common port of the front-inserted optical switch module 102 in the device are externally connected with optical fiber connectors, and each second input common port of the rear-inserted optical switch module 103 and each The second common output ports are externally connected with optical fiber connectors, and two pairs of optical fiber connectors can be detachably connected through optical fiber connectors. The front-insertion optical switch module 102 and the rear-insertion optical switch module 103 are taken out and reconfigured and combined as required to form a new test system, and the existing optical switch device is reused.

(3) The first output ordinary port of the front-plug optical switch module 102 is located in the second optical fiber connection unit 305 and is integrated with the second optical fiber connection unit 305 in the front-plug optical switch module 102, and the second output common port of the rear-plug switch module is located in The second output ordinary port unit 405 and the second output ordinary port unit 405 are integrated into the rear optical switch module 103, and the second optical fiber connection unit 305 and the second output ordinary port unit 405 realize blind-mating docking at the backplane 104, for Disassembly/assembly of the optical switching device is facilitated.

(4) The device adopts a box-type modular structure and has flexible configuration. It adopts a single front-inserted optical switch module 102, a single rear-inserted optical switch module 103, or simultaneously inserts the front-inserted optical switch module 102 and the rear-inserted optical switch module. 103 to combine the optical switch device you need, for example: multi-channel 1*N optical switch, NxM optical switch matrix, optical switch array with loopback function, etc.

(5) The device adopts a plug-in modular structure, which can easily add required module units, such as multi-channel variable optical attenuator (Variable Optical Attenuator, VOA) or optical power meter (Optical Power Meter, OPM), etc. The instrument function module can expand the function of the system, so that the built intelligent manufacturing optical instrument cloud system has good scalability and manufacturing flexibility.

The optical switch device in the above embodiments is mainly used in the production test scene with a single board of optical interface equipment in the field of intelligent manufacturing, and is used to build various test systems. Scenarios for expansion or dynamic switching, such as distributed optical monitoring scenarios: multiple monitored optical fiber lines and a small number of high-value instruments perform composite monitoring to increase the amount of monitored information.

The embodiment of the present application also provides an optical module testing system, as shown in FIG. 8 , including: an optical module under test, a test instrument 604, and a plurality of optical switch devices 60 as in the above-mentioned embodiments. A plurality of optical switch devices 60 are connected in series, and a plurality of optical switch devices 60 include a head-end optical switch device 602 connected to the optical module to be tested, and a tail-end optical switch device 603 connected to a test instrument 604; along the head-end optical switch device 602 to In the extending direction of the optical switch device 603 at the tail end, the optical signal connection is realized between the third optical fiber connection unit 402 of the previous optical switch device and the first optical fiber connection unit 302 of the latter optical switch device through a connecting line, so that the previous optical switch device The second input common port of the optical switch device is optically connected to the first input common port of the latter optical switch device; The number of ports is the same.

Specifically, each performance index of the optical module under test (such as optical network equipment in the communication network) requires a dedicated instrument for testing. At present, it is relatively easy to think of a solution that uses ordinary optical switches to realize the same optical module under test and different optical modules. The test channel switching between instruments, or the test channel switching between the same instrument and different optical modules under test, or the test channel switching scheme between different optical modules under test and different instruments in a serial manner, these test solutions all have a common shortcoming. Instruments cannot be shared, and the use efficiency of instruments is low, resulting in high cost of the entire test system.

In this embodiment, a flexible optical switch device is proposed in the above-mentioned embodiments, and various customized optical module test systems can be built by combining the flexible optical switch device and high-value optical instruments according to the requirements of intelligent manufacturing to realize It realizes the sharing of high-value optical instruments, and makes the optical module test system have good manufacturing flexibility while reducing the manufacturing cost.

For example: it is necessary to test 32 optical modules under test (for example: optical network equipment in a communication network), wherein every two optical modules under test are integrated in one unit under test 601, and each unit under test 601 has two Ports (Port 1 and Port 2), each port corresponds to an optical module under test. In practical applications, three or more optical modules under test may be integrated in one unit under test 601 . Each port of the unit under test 601 shown in Fig. 8 comprises two interfaces (Tx interface and Rx interface), and each interface corresponds to a port connected to the optical switch device, that is to say, each port of the unit under test 601 Corresponding to two ports connected to the optical switch device, one unit under test 601 is correspondingly connected to four ports of the optical switch device. In the test, each optical module under test, that is to say, one port of a test instrument (such as a bit error tester) that needs to be used for each port, and 32 tested optical modules need to use a test instrument (such as a bit error tester) of 32 ports.

The optical module testing system in this embodiment includes two optical switch devices (device 1 and device 2), and device 1 is made up of 8 front-inserted optical switch modules 102 as shown in Figure 4, and the front-inserted optical switch module 102 The first optical switch is a 1*2 optical switch, wherein the A port number of the device 1 is As, s is 1 to 64, and there is a correspondence between the A port number At in the front-plug optical switch module 102 shown in FIG. 4 Relationship, t ranges from 1 to 8. The corresponding relationship is s=8*(n−1)+t, where n is the serial number of the front-plug optical switch module 102 in the device 1, which is 1-8. Device 2 is an 8x32 optical switch matrix formed by cascading 8 front-plug optical switch modules 102 and 4 rear-plug optical switch modules 103 as shown in FIG. 7 .

In this embodiment, after the above-mentioned optical switch device is used to transform the test system, when 32 tested optical modules are tested, the 4 ports of the test instrument (such as a bit error detector) can realize the test of 32 tested optical modules. 28 ports of test instruments (such as bit error detectors) are saved, and the cost of the entire test system is greatly reduced.

It is not difficult to find that the optical switch device used in this system embodiment can be one or more. For the specific structure of the optical switch device used in the embodiment, please refer to the related In order to reduce repetition, the technical details are not repeated here.

It is worth mentioning that all the modules involved in the above embodiments are logical modules. In practical applications, a logical unit can be a physical unit, or a part of a physical unit, or multiple physical Combination of units. In addition, in order to highlight the innovative part of the present application, the above embodiments do not introduce units that are not closely related to solving the technical problems raised by the present application, but this does not mean that there are no other units in the above embodiments.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.

Claims (10)

1. An optical switch device, comprising:

   a sub-box having an opening, and a cover plate for closing the opening, the cover plate closing the opening and forming a cavity with the sub-box;

   The backplane located in the cavity, the inner wall of the plug-in box is provided with a plurality of slots, and the plurality of slots are respectively provided with a main control module and a power supply module connected to the backplane signal, and connected to the The optical switch module is detachably connected to the backplane, and the main control module monitors the states of the power supply module and the optical switch module through the backplane.
2. The optical switch device according to claim 1, wherein the optical switch module comprises at least one front-plug optical switch module located on one side of the backplane;

   The front-plug optical switch module includes a plurality of first optical switches, and each of the first optical switches includes: a first input common port and a first output common port, and each of the first optical switches of the first optical switch Both the input common port and the first output common port are connected with optical fiber connectors;

   It also includes: a first optical fiber connection unit and a second optical fiber connection unit respectively fixedly connected by a plurality of optical fiber connectors, the first input common port is located in the first optical fiber connection unit, and the first output common port Located in the second optical fiber connection unit, a side of the first optical fiber connection unit not connected to the first input common port is exposed outside the subrack.
3. The optical switch device according to claim 2, wherein the first optical fiber connection unit and the second optical fiber connection unit are both integrated in the front-plug optical switch module.
4. The optical switch device according to claim 2 or 3, wherein the second optical fiber connection unit is provided with a connection line for connecting any two of the first common output ports, so as to implement the front-plug optical switch module self-loopback.
5. The optical switch device according to claim 2 or 3, wherein the optical switch module further comprises: a rear optical switch module that is detachably connected to the backplane and arranged opposite to the front optical switch module ;

   The rear-plug optical switch module includes a plurality of second optical switches, and each of the second optical switches includes: a second input common port and a second output common port, and the second optical switch of each second optical switch Both the input common port and the second output common port are connected with optical fiber connectors;

   It also includes: a third optical fiber connection unit fixedly connected by a plurality of optical fiber connectors, the second input common port is located in the third optical fiber connection unit, and the third optical fiber connection unit is not connected to the second input One side of the common port is exposed outside the optical switch device;

   The second output common port is optically connected to the first output common port in the second optical fiber connection unit, so as to realize the optical signal between the rear-inserted optical switch module and the front-inserted optical switch module connect.
6. The optical switch device according to claim 5, wherein the third optical fiber connection unit is integrated in the rear optical switch module.
7. The optical switch device according to claim 5, wherein the second output common port of the rear-plug optical switch module forms a second output common port unit through a fixing device.
8. The optical switch device according to claim 7, wherein the first output common port of the front-plug optical switch module is connected to the second output common port unit through the second optical fiber connection unit. The second output common port is blind-mated and docked, so as to realize the optical signal connection between the rear optical switch module and the front optical switch module.
9. The optical switch device according to claim 8, wherein a plurality of said front-inserted optical switch modules are arranged in a horizontal line, and a plurality of said rear-inserted optical switch modules are arranged in a vertical line;

   The first output common ports are arranged in an array of the second optical fiber connection unit, the numbers of the first output common ports in each row are the same, and each column is composed of all the first output ports of the first optical switch. Ordinary ports are composed in sequence of numbers;

   The second output ordinary ports are arranged in an array of the second output ordinary port units, and each row is composed of all the second output ordinary ports of one second optical switch in numbered order, and the first output ports of each row are The two output ordinary ports have the same number.
10. An optical module testing system, comprising: an optical module under test, a test instrument, and a plurality of optical switch devices according to any one of claims 5 to 9;

    A plurality of optical switch devices are connected in series, and the plurality of optical switch devices include a head-end optical switch device connected to the optical module under test, and a tail-end optical switch device connected to the test instrument;

    Along the extension direction from the head-end optical switch device to the tail-end optical switch device, the third optical fiber connection unit of the former optical switch device and the first optical fiber of the latter optical switch device The connecting units are optically connected through connecting lines, so that the second input common port of the former optical switch device is optically connected with the first input common port of the latter optical switch device;

    And the number of the second input common ports of the former optical switch device is the same as the number of the first input common ports of the latter optical switch device.

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