Optical switch module and test system

Abstract

The utility model relates to the technical field of optical communication, and relates to an optical switch module and a test system. The optical switch module comprises an optical signal input end, a plurality of optical transmitting ports, a plurality of optical receiving ports, a first optical splitter, a first optical switch, a second optical switch, a first optical detector, a second optical detector and a third optical detector, the first optical switch can be controlled to switch output channels, and the second optical switch can be controlled to switch input channels; an optical signal input by the optical signal input end is split by the first optical splitter, one optical signal is transmitted to the to-be-detected input port from one optical transmitting port through the first optical switch, and the other optical signal is transmitted to the first optical detector; an optical signal output by the corresponding to-be-detected output port is input from one optical receiving port and then is transmitted to the second optical detector through the second optical switch; an optical signal incident from the optical emission port is transmitted to the first optical splitter through the first optical switch for light splitting, and one path of optical signal is transmitted to the third optical detector. The test efficiency can be improved, and the cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical communication technical field, especially an optical switch module and test system. BACKGROUND

[0002] In the field of optical communication, with the development of technology, products such as photodetector array modules and optical switch arrays are being used more and more widely. These products usually have a large number of ports, which are used to realize complex optical signal processing and transmission functions.

[0003] Before or during the use of the above optical communication products, they need to be tested. The traditional testing method is to test each port of the optical communication product by connecting them one by one. However, this traditional testing method has low testing efficiency and high production cost. SUMMARY

[0004] The technical problem to be solved by the embodiments of the utility model lies in providing an optical switch module and test system to solve the problem of low testing efficiency and high production cost of optical communication products in the prior art.

[0005] The utility model discloses an optical switch module, the optical switch module is used for testing the product to be measured, the product to be measured includes a plurality of input ports to be measured and a plurality of output ports to be measured corresponding to a plurality of input ports to be measured, the optical switch module includes optical signal input end, a plurality of light emitting ports, a plurality of light receiving ports, first beam splitter, first optical switch, second optical switch, first optical detector, second optical detector and third optical detector, the first optical switch includes a plurality of output channels corresponding to a plurality of light emitting ports, the first optical switch can be controlled to switch on one of the output channels, the second optical switch includes a plurality of input channels corresponding to a plurality of light receiving ports, the second optical switch can be controlled to switch on one of the input channels, wherein the optical signal input from the optical signal input end is split into two optical signals by the first beam splitter, one of the optical signals is transmitted from one of the light emitting ports to one of the input ports to be measured through the first optical switch, and the other optical signal is transmitted to the first optical detector to detect the input optical power of the input port to be measured;The optical signal output corresponding to the output port to be measured is input from one of the light receiving ports and transmitted to the second optical detector through the second optical switch to detect the output optical power corresponding to the output port to be measured;The optical signal incident from the corresponding light emitting port is transmitted to the first beam splitter through the first optical switch by the input port to be measured, and two optical signals are formed, one of the optical signals is transmitted to the third optical detector to detect the reflected optical power of the input port to be measured.

[0006] Optionally, the optical switch module further comprises a first control unit, the first control unit is connected with the first optical switch, the second optical switch, the first optical detector, the second optical detector and the third optical detector, the first control unit is used for controlling switching the output channel of the first optical switch and the input channel of the second optical switch, and is used for calculating the insertion loss value and the reflection loss value of the product to be tested according to the input light power on the first optical detector, the output light power on the second optical detector and the reflected light power on the third optical detector.

[0007] Optionally, the optical switch module further comprises a circuit board, and the first control unit is arranged on the circuit board.

[0008] Optionally, the optical switch module further comprises a base, and the first optical splitter, the first optical switch, the second optical switch, the first optical detector, the second optical detector, the third optical detector and the circuit board are arranged on the base.

[0009] Optionally, the first optical splitter is a 2x2 optical splitter.

[0010] The utility model discloses still a kind of test system, including second optical splitter and at least one as described above optical switch module, the second optical splitter is used to divide equally optical signal source, and then the divided optical signal is connected to the optical signal input end of each optical switch module.

[0011] Optionally, the second optical splitter is a fiber taper splitter or a PLC splitter.

[0012] Compared with the prior art, the optical switch module and the test system have the beneficial effects that: the first optical switch and the second optical switch are arranged, the first optical switch includes a plurality of output channels and corresponds to a plurality of optical transmitting ports one by one, the first optical switch can be controlled to switch on one of the output channels, the optical signal is guided into one of the optical transmitting ports, and the optical signal is transmitted to one to-be-tested input port of the product to be tested; the first optical detector receives another optical signal after the first optical splitter splits the light; the optical signal incident from the corresponding optical transmitting port is transmitted to the first optical splitter through the first optical switch to form two optical signals, one of which is transmitted to the third optical detector; the second optical switch can be controlled to switch on one of the input channels, and the optical signal output by the corresponding to-be-tested output port of the product to be tested is guided and transmitted to the second optical detector; therefore, when the optical switch module is used to test the product to be tested, the to-be-tested input port of the product to be tested and the optical transmitting port are connected one by one, the to-be-tested output port and the optical receiving port are connected one by one, the first optical switch and the second optical switch are driven and controlled, the to-be-tested input port and the to-be-tested output port can be quickly switched, the first optical detector, the second optical detector and the third optical detector are used to detect the input optical power, the reflected optical power and the output optical power of each port of the product to be tested, manual operation and connection switching of the channels of the product to be tested are not needed, the operation difficulty of the tester is reduced, the test efficiency of the product is improved, and the production labor cost is reduced; since the first optical detector, the second optical detector and the third optical detector are arranged in the optical switch module as signal receiving ends, the test system does not need to be externally connected to an optical power meter, a spectrometer and other valuable measuring devices, and the equipment investment cost can be reduced. In addition, the optical switch module has the functions of receiving and transmitting, and it is more convenient to expand and construct a larger test system. BRIEF DESCRIPTION OF DRAWINGS

[0013] The technical solutions of the utility model will be further described in detail below with reference to the drawings and embodiments, and the drawings are as follows:

[0014] Figure 1 is the structural schematic diagram of the optical switch module provided by the utility model embodiment;

[0015] Figure 2 is the structural schematic diagram of the application scene of the test system provided by the utility model embodiment;

[0016] Figure 3 is the structural schematic diagram of another application scene of the test system provided by the utility model embodiment.

[0017] Figure 4 is the test flow chart of the test system provided by the utility model embodiment.

[0018] The reference signs in the drawings are as follows:

[0019] 10, to-be-tested input terminal; 20, to-be-tested output terminal;

[0020] 110, optical signal input terminal; 120, optical transmitting port; 130, optical receiving port; 140, first optical splitter; 150, first optical switch; 160, second optical switch; 170 (PD1), first optical detector; 180 (PD2), second optical detector; 190 (PD3), third optical detector; 210, first control unit; 220, circuit board; 230, base station; 240, second optical splitter. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the present application will be described in detail with reference to the drawings.

[0022] The optical switch module is used for testing a to-be-tested product. The to-be-tested product includes a plurality of to-be-tested input terminals 10 and a plurality of to-be-tested output terminals 20 corresponding to the plurality of to-be-tested input terminals 10. The number of the to-be-tested input terminals 10 can be two, three or more than three. Correspondingly, the number of the to-be-tested output terminals 20 can be two, three or more than three. The to-be-tested product can be an array photodetector, an array optical switch or the like.

[0023] Reference Figure 1The optical switch module includes an optical signal input end 110, a plurality of optical transmitting ports 120, a plurality of optical receiving ports 130, a first optical splitter 140, a first optical switch 150, a second optical switch 160, a first optical detector 170, a second optical detector 180, and a third optical detector 190. The first optical switch 150 includes a plurality of output channels corresponding to the plurality of optical transmitting ports 120. The first optical switch 150 can be controlled to switch on one of the output channels. The second optical switch 160 includes a plurality of input channels corresponding to the plurality of optical receiving ports 130. The second optical switch 160 can be controlled to switch on one of the input channels. The optical signal input from the optical signal input end 110 is split into two paths by the first optical splitter 140. One of the two paths of optical signal is transmitted from one of the optical transmitting ports 120 to one of the to-be-detected input ports 10 via the first optical switch 150. The other path of optical signal is transmitted to the first optical detector 170 to detect the input optical power of the to-be-detected input port 10. The optical signal output from the to-be-detected output port 20 is input from one of the optical receiving ports 130 and transmitted to the second optical detector 180 via the second optical switch 160 to detect the output optical power of the to-be-detected output port 20. The optical signal input from the corresponding optical transmitting port 120 and reflected by the to-be-detected input port 10 is transmitted to the first optical splitter 140 via the first optical switch 150. The first optical splitter 140 splits the optical signal into two paths. One of the two paths of optical signal is transmitted to the third optical detector 190 to detect the reflected optical power of the to-be-detected input port 10.

[0024] The optical switch module in this embodiment of the application is configured with a first optical switch 150 and a second optical switch 160. The first optical switch 150 includes multiple output channels, each corresponding to a multiple optical emission ports 120. The first optical switch 150 can be controlled to switch on one of the output channels, guiding the optical signal to one of the optical emission ports 120 and transmitting it to a test input port 10 of the product under test. The first photodetector 170 receives another optical signal after it has been split by the first beam splitter 140. The optical signal reflected back from the test input port 10 from the corresponding optical emission port 120 is transmitted through the first optical switch 150 to the first beam splitter 140 to form two optical signals, one of which is transmitted to the third photodetector 190. The second optical switch 160 can be controlled to switch on one of the input channels, guiding the optical signal output from the corresponding test output port 20 of the product under test to the second photodetector 180. Therefore, using this application... The optical switch module is used to test the product under test (DUT). By connecting the DUT's input port 10 to the optical transmitter port 120 and the output port 20 to the optical receiver port 130, the first optical switch 150 and the second optical switch 160 can be driven to quickly switch between the input port 10 and the output port 20. The first photodetector 170, the second photodetector 180, and the third photodetector 190 detect the input, reflected, and output optical power of each port of the DUT. This eliminates the need for manual operation of each channel of the DUT, reducing the difficulty of operation for testing personnel, improving product testing efficiency, and reducing production labor costs. Since the optical switch module has built-in first, second, and third photodetectors as signal receivers, the testing system does not require external expensive measuring equipment such as optical power meters and spectrometers, reducing equipment investment costs. Furthermore, because the optical switch module has integrated transceiver functionality, it is more convenient to expand and build larger testing systems.

[0025] By setting up a third photodetector 190 to receive the optical signal reflected back from the input port 10 of the product under test (DUT), the reflected optical power of the input port 10 can be detected. This helps in analyzing and processing the reflection loss of the corresponding input port 10 of the DUT, and in evaluating the performance of the DUT. Abnormal changes in reflected optical power can also serve as an important basis for fault diagnosis. For example, a sudden increase in reflected optical power may indicate a break or bend in the optical fiber connection.

[0026] The number of optical transmission ports 120 can be two, three, or more, such as... Figure 1 The ports A1, A2, ..., An are shown, where n is a natural number greater than 1. Correspondingly, the number of optical receiving ports 130 can be two, three, or more, such as... Figure 1The ports B1, B2, …, Bn, n is a natural number greater than 1, can be set by the designer as needed. When the number of output channels of the first optical switch 150 and the number of input channels of the second optical switch 160 are sufficient, and the number of corresponding optical transmitting ports 120 and optical receiving ports 130 is sufficient, the optical switch module can test a plurality of products to be tested or a plurality of products to be tested, and the test efficiency is high.

[0027] Optionally, the first optical splitter is a 2x2 optical splitter. The 2x2 optical splitter usually has two input ports and two output ports, and can split the optical signal input by the optical signal input port into two paths and output to the first optical transmitter 150 and the first optical detector 170.

[0028] Reference Figure 1 In an optional embodiment of the present application, the optical switch module further comprises a first control unit 210, the first control unit 210 being connected to the first optical switch 150, the second optical switch 160, the first optical detector 170, the second optical detector 180 and the third optical detector 190, the first control unit 210 being used to control the switching of the output channel of the first optical switch 150 and the input channel of the second optical switch 160, and to calculate the insertion loss value and the reflection loss value of the product to be tested according to the input optical power on the first optical detector, the output optical power on the second optical detector and the reflected optical power on the third optical detector.

[0029] By setting the first control unit 210, the first control unit 210 can preset a control program, automatically control the first optical switch 150 to quickly switch the output channel, transmit the optical signal to the specified input port to be tested, and control the second optical switch 160 to quickly switch the input channel, introduce the optical signal output by the specified output port 20 to the third optical detector 190 for optical power detection; and receive the input optical power detected by the first optical detector 170, the output optical power detected by the second optical detector 180 and the reflected optical power detected by the third optical detector 190, and process and analyze these test data to obtain the insertion loss value and the reflection loss value of the insertion product, reflect the performance of the product to be tested, further improve the test efficiency, greatly reduce the production labor cost, and save the investment of valuable equipment such as optical power meter and optical spectrum analyzer.

[0030] Wherein, the input light power and the reflected light power of a certain to-be-tested input port 10 are substituted into the corresponding formula to calculate the reflection loss value of the to-be-tested product; the input light power of a certain to-be-tested input port 10 and the output light power of the corresponding to-be-tested output port 20 are substituted into the corresponding formula to calculate the insertion loss value of the to-be-tested product. The first control unit 210 can be realized by using an existing single-chip microcomputer, which is pre-set with a control program and can be driven to realize the channel switching control of the first optical switch 150 and the second optical switch 160, and to realize the calculation of the insertion loss value and the emission loss value of the to-be-tested product, without the need for manual further judgment on the detection data, thereby further improving the test efficiency and greatly reducing the production labor cost.

[0031] Reference Figure 1 In optional embodiments of the present application, the optical switch module further comprises a circuit board 220, and the first control unit 210 is arranged on the circuit board 220.

[0032] By arranging the circuit board 220, a bearing body can be provided for the first control unit 210, facilitating the assembly of the first control unit 210 with other optical components to form the optical switch module.

[0033] Reference Figure 1 In optional embodiments of the present application, the optical switch module further comprises a base 230, and the first beam splitter 140, the first optical switch 150, the second optical switch 160, the first optical detector 170, the second optical detector 180, the third optical detector 190 and the circuit board 220 are arranged on the base 230.

[0034] The base 230 provides a unified physical support platform for the components in the optical switch module (such as the first beam splitter 140, the first optical switch 150, the second optical switch 160, the first optical detector 170 and the circuit board 220, etc.), so that these components can be compactly integrated together. When the optical switch module needs to be used, the entire base 230 can be moved to prevent the positional deviation between the components from causing the problem of light signal transmission, thereby improving the overall stability and reliability of the optical switch module.

[0035] Reference Figures 1 to 3 The present application also provides a test system comprising a second beam splitter 240 and at least one optical switch module as described above, and the second beam splitter 240 is used to divide the light signal source and then connect the divided light signal to the light signal input end 110 of each optical switch module.

[0036] The optical switch module in the test system of the embodiment of the present application is provided with a first optical switch 150 and a second optical switch 160. The first optical switch 150 includes a plurality of output channels corresponding to a plurality of optical transmitting ports 120. The first optical switch 150 can be controlled to switch on one of the output channels to guide the optical signal to one of the optical transmitting ports 120 for transmission to one of the input ports 10 of the product under test. The first optical detector 170 receives another light signal split by the first optical splitter 140. The light signal incident on the optical transmitting port 120 is transmitted to the first optical splitter 140 through the first optical switch 150 to form two light signals, one of which is transmitted to the third optical detector 190. The second optical switch 160 can be controlled to switch on one of the input channels to guide the optical signal output by the output port 20 of the product under test to the second optical detector 180. Therefore, when the product under test is tested using the optical switch module of the present application, the input port 10 of the product under test can be connected to the optical transmitting port 120 one by one, and the output port 20 can be connected to the optical receiving port 130 one by one. The first optical switch 150 and the second optical switch 160 can be driven and controlled to quickly switch the input port 10 and the output port 20. The first optical detector 170, the second optical detector 180 and the third optical detector 190 can be used to detect the input optical power, the reflected optical power and the output optical power of each port of the product under test. Manual operation is not required to test the channels of the product under test one by one. The operation difficulty of the tester is reduced, the test efficiency of the product is improved, and the labor cost of production is reduced. Since the first optical detector, the second optical detector and the third optical detector are provided in the optical switch module as the signal receiving end, the test system does not need to be externally connected to the optical power meter, the spectrometer and other valuable measuring equipment, so that the equipment investment cost can be reduced. In addition, since the optical switch module has the functions of receiving and transmitting, it is more convenient to expand and build a larger test system, and the investment in valuable equipment such as optical power meters and optical spectrum analyzers is saved.

[0037] In specific applications, the number of optical switch modules in the test system can be one, two, three or more than three. The second optical splitter 240 controls the input of the optical signal to the optical signal input end 110 of each optical switch module. Multiple optical switch modules can be arranged to test a plurality of ports of one product under test simultaneously. As shown in Figure 2 , or to test a plurality of products under test simultaneously, for example, one optical switch module tests one product under test, and another optical switch module tests two other products under test, as shown in Figure 3 , or other combination forms.

[0038] The specific structure and technical effects of the optical switch module in the test system of the embodiments of the present application are the same as those of the optical switch module described above, and will not be repeated here.

[0039] The test system test flowchart of the embodiments of the present application is shown in detail in Figure 4 The test flow of the test system is as follows:

[0040] The light source signal is connected to the optical signal input end 110 of the optical switch module;

[0041] The optical transmitting port 120 of the optical switch module is connected to the optical receiving port 130;

[0042] The test system is started and zeroed / reset;

[0043] The to-be-tested input port of the to-be-tested product is connected to the optical transmitting port 120 of the optical switch module;

[0044] The to-be-tested output port of the to-be-tested product is connected to the optical receiving port 130 of the optical switch module;

[0045] A preset control program is started, the optical switch in the optical switch module is started to switch channels, data on the optical detector is synchronously collected and statistically analyzed, and the test result of the to-be-tested product is output;

[0046] The test is completed, and the next to-be-tested product is replaced.

[0047] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced by equivalents; all these modifications and replacements should belong to the protection scope of the claims of the present application.

Claims

1. An optical switch module, characterized in that, The optical switch module is used to test the product under test (DUT). The DUT includes multiple input ports and multiple output ports corresponding to the input ports. The optical switch module includes an optical signal input terminal, multiple optical emission ports, multiple optical reception ports, a first beam splitter, a first optical switch, a second optical switch, a first photodetector, a second photodetector, and a third photodetector. The first optical switch includes multiple output channels corresponding to the optical emission ports, and the first optical switch can be controlled to switch on one of the output channels. The second optical switch includes multiple input channels corresponding to the optical reception ports, and the second optical switch can be controlled to switch on one of the input channels. The optical signal input terminal receives optical signals from the optical signal input terminal. The light is split into two optical signals by the first beam splitter. One optical signal is transmitted from one of the optical transmitting ports to one of the input ports under test via the first optical switch, and the other optical signal is transmitted to the first photodetector to detect the input optical power of the input port under test. The optical signal output from the corresponding output port under test is input from one of the optical receiving ports and transmitted to the second photodetector via the second optical switch to detect the output optical power of the corresponding output port under test. The optical signal reflected from the corresponding optical transmitting port back from the input port under test is transmitted to the first beam splitter by the first optical switch to form two optical signals. One of the optical signals is transmitted to the third photodetector to detect the reflected optical power of the input port under test.

2. The optical switch module according to claim 1, characterized in that, The optical switch module further includes a first control unit, which is connected to the first optical switch, the second optical switch, the first photodetector, the second photodetector, and the third photodetector. The first control unit is used to control the switching of the output channel of the first optical switch and the input channel of the second optical switch, and to calculate the insertion loss value and reflection loss value of the product under test based on the input optical power on the first photodetector, the output optical power on the second photodetector, and the reflected optical power on the third photodetector.

3. The optical switch module according to claim 2, characterized in that, The optical switch module also includes a circuit board, on which the first control unit is mounted.

4. The optical switch module according to claim 3, characterized in that, The optical switch module also includes a base, on which the first beam splitter, the first optical switch, the second optical switch, the first photodetector, the second photodetector, the third photodetector, and the circuit board are all mounted.

5. The optical switch module according to any one of claims 1-4, characterized in that, The first beam splitter is a 2x2 beam splitter.

6. A testing system, characterized in that, It includes a second beam splitter and at least one optical switch module as described in any one of claims 1-5, wherein the second beam splitter is used to divide the optical signal source into equal parts and then connect the divided optical signals to the optical signal input terminal of each of the optical switch modules.

7. The testing system according to claim 6, characterized in that, The second splitter is either a fiber taper splitter or a PLC splitter.

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