CN115165306A - Multi-channel FBG testing method - Google Patents
Multi-channel FBG testing method Download PDFInfo
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- CN115165306A CN115165306A CN202210761894.0A CN202210761894A CN115165306A CN 115165306 A CN115165306 A CN 115165306A CN 202210761894 A CN202210761894 A CN 202210761894A CN 115165306 A CN115165306 A CN 115165306A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the field of optics, in particular to a testing method of a multi-channel FBG. The testing method comprises a testing device, wherein the testing device comprises a light source, a first light splitting component, a first optical channel, an optical power unit, a first interface to be tested and a second interface to be tested, the light source generates optical signals, the optical signals pass through the first light splitting component and are divided into multiple paths, the optical signals are transmitted through multiple paths of first optical channels, the first optical channels are converged into the first interface to be tested, the optical power unit is provided with multiple paths of first sampling ports, and the multiple paths of the first sampling ports are converged into the second interface to be tested. Compared with the prior art, the method has the advantages that the method realizes the rapid detection of the optical power through the testing method of the multi-channel FBG, detects each channel of the multi-channel FBG, realizes the detection of all the channels at one time, and improves the detection efficiency.
Description
Technical Field
The invention relates to the field of optics, in particular to a testing method of a multi-channel FBG.
Background
FBGs are known as Fiber Bragg gratings, i.e. gratings with periodic spatial phase distribution formed in the Fiber core, and essentially form a narrow-band (transmission or reflection) filter or mirror in the Fiber core. Further, the multi-channel FBG610 is a grating having multiple optical fibers, each of which is formed in the core with a periodic spatial phase distribution, and the multiple optical fibers are integrally disposed.
The detection of FBGs, especially multi-channel FBGs, requires separate optical power detection for each channel, and separate operation for each optical fiber even with the associated detection equipment, which is very inefficient.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for testing a multi-channel FBG, which solves the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the testing method comprises a testing device, wherein the testing device comprises a light source, a first light splitting assembly, a first optical channel, an optical power unit, a first interface to be tested and a second interface to be tested, an optical signal generated by the light source passes through the first light splitting assembly, is divided into multiple paths and is transmitted through the multiple paths of the first optical channel, the first optical channel is converged into the first interface to be tested, the optical power unit is provided with multiple paths of first sampling ports, and the multiple paths of the first sampling ports are converged into the second interface to be tested;
the testing method comprises the following steps:
a third interface to be tested and a fourth interface to be tested are respectively arranged at two ends of the multi-channel FBG to be tested to form a material to be tested;
respectively connecting a third interface to be tested and a fourth interface to be tested of a material to be tested into a first interface to be tested and a second interface to be tested; the first optical channel is connected and matched with a corresponding optical fiber in the multi-channel FBG through a first interface to be tested and a third interface to be tested, and an optical fiber in the multi-channel FBG is connected and matched with a first sampling port of a corresponding path through a second interface to be tested and a fourth interface to be tested;
the light source is started, an optical signal is generated, the light is split into the corresponding first optical channel through the first light splitting assembly, and the light is incident to the optical power unit through the corresponding optical fiber and the first sampling port;
the optical power unit samples and obtains optical power data of the material to be detected through the first sampling port.
Wherein, the preferred scheme is: the testing device further comprises a plurality of second light splitting assemblies and a plurality of second optical channels, each first optical channel is provided with one second light splitting assembly, one end of each second optical channel is communicated with the light splitting end of each second light splitting assembly, optical signals are split through the second light splitting assemblies, part of the optical signals are emitted along the first optical channels to form transmission channels, and part of the optical signals are emitted along the second optical channels to form reflection channels.
Wherein, the preferred scheme is: the optical power unit is provided with a plurality of paths of second sampling ports, the plurality of paths of second optical channels are converged into another first interface to be tested, and the plurality of paths of second sampling ports are converged into another second interface to be tested; wherein the content of the first and second substances,
the testing method comprises the following steps:
respectively connecting a third interface to be tested and a fourth interface to be tested of the material to be tested into a first interface to be tested of a second optical channel and a second interface to be tested of a second sampling port; the second optical channel is connected and matched with a corresponding optical fiber in the multi-channel FBG through the first interface to be tested and the third interface to be tested, and an optical fiber in the multi-channel FBG is connected and matched with the second sampling port of the corresponding path through the second port to be tested and the fourth interface to be tested;
the light source is started, an optical signal is generated, the light is split into the corresponding first optical channel through the first light splitting assembly, then the light is incident into the corresponding second optical channel through the second light splitting assembly, and then the light is incident into the optical power unit through the corresponding optical fiber and the second sampling port;
and the optical power unit samples and acquires optical power data passing through the material to be detected through the second sampling port.
Wherein, the preferred scheme is: the first interface to be tested and the third interface to be tested are respectively an MPO male connector and an MPO female connector, the second interface to be tested and the fourth interface to be tested are also respectively an MPO male connector and an MPO female connector, and the MPO male connector and the MPO female connector are connected through MPO adapters.
Wherein, the preferred scheme is: the step of installing the third interface and the fourth interface that awaits measuring respectively on the both ends of multichannel FBG that awaits measuring includes:
and respectively aligning and assembling two ends of the multi-channel FBG to the third interface to be tested and the fourth interface to be tested by using the optical fiber aligner.
Wherein, the preferred scheme is: the light source is a scanning light source, and the testing method comprises the following steps:
the optical power unit is started when the scanning light source generates rising edge pulses of optical signals, and the timing function of an internal FPGA is started to realize timing sampling of optical power data;
the optical power unit and the scanning light source synchronously trigger the scanning mode.
Wherein, the preferred scheme is: the testing method comprises the following steps: the optical power unit synchronously performs sampling and data processing through an internal FIFO, and finishes sampling all voltage data and completely converts the voltage data into mW optical power at the moment when the scanning of the scanning light source is finished.
Wherein, the preferred scheme is: the testing device also comprises a processing computer, the optical power unit is connected with the processing computer through a transmission bus, a decoding module is arranged in the processing computer, and the processing computer acquires optical power data transmitted by the optical power unit and synchronously decodes the optical power data through the decoding module to acquire corresponding data information.
Wherein, the preferred scheme is: the processing computer is also connected with the scanning type light source, and the processing computer respectively controls the scanning type light source to generate new optical signals after decoding operation is completed so as to trigger the scanning mode of the optical power unit and realize uninterrupted scanning.
Wherein, the preferred scheme is: the first light splitting component is a 1 × 16 light splitting device, and 9 light outlets of the first light splitting component are communicated with 9 paths of first optical channels.
Compared with the prior art, the method has the advantages that the method realizes the rapid detection of the optical power through the testing method of the multi-channel FBG, detects each channel of the multi-channel FBG, realizes the detection of all the channels at one time, and improves the detection efficiency.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the structure of the testing device of the present invention;
FIG. 2 is a schematic view of the structure of the material to be tested according to the present invention;
FIG. 3 is a schematic flow chart of the testing method of the multi-channel FBG of the present invention;
FIG. 4 is a schematic structural diagram of a testing apparatus based on a second optical splitter module and a second optical channel according to the present invention;
FIG. 5 is a flow chart of a scan test method according to the present invention;
FIG. 6 is a schematic diagram of a test apparatus based on a processing system according to the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in FIGS. 1-3, the present invention provides a preferred embodiment of a method of testing a multi-channel FBG 610.
The utility model provides a test method of multichannel FBG610, realizes through testing arrangement, testing arrangement includes light source 100, first beam splitting subassembly 200, first optical channel 310, optical power unit 500, first interface 410 and the second interface 420 that awaits measuring, first optical channel 310 is provided with a plurality ofly, first beam splitting subassembly 200 communicates with light source 100 and a plurality of first optical channel 310 respectively, the first interface 410 that awaits measuring of first optical channel 310 outwards jets out, the second interface 420 that awaits measuring communicates with a plurality of sample connection of optical power unit 500, optical power unit 500 obtains outside light signal through corresponding sample connection through second interface 420 that awaits measuring to measure to carry out optical power detection, light source 100 produces light signal and divides into the multichannel through first beam splitting subassembly 200 to through multichannel first optical channel 310 transmission, first optical channel 310 assembles in an interface 410 that awaits measuring, optical power unit 500 is provided with multichannel first sample connection 510, and the multichannel first sample connection 510 also assembles in a second interface 420 that awaits measuring.
The testing method comprises the following steps:
step S11, respectively installing a third interface 621 to be tested and a fourth interface 622 to be tested at two ends of the multi-channel FBG610 to be tested to form a material 600 to be tested;
step S12, respectively connecting a third interface 621 to be tested and a fourth interface 622 to be tested of the material 600 to be tested into the first interface 410 to be tested and the second interface 420 to be tested; one of the first optical channels 310 is connected and matched with the corresponding optical fiber in the multi-channel FBG610 through the first interface to be tested 410 and the third interface to be tested 621, and one optical fiber in the multi-channel FBG610 is connected and matched with the first sampling port 510 of the corresponding path through the second interface to be tested 420 and the fourth interface to be tested 622;
step S21, turning on the light source 100 and generating an optical signal, and splitting the optical signal into the corresponding first optical channel 310 through the first optical splitter 200, and then entering the optical power unit 500 through the corresponding optical fiber and the first sampling port 510;
step S22, the optical power unit 500 samples and obtains the optical power data passing through the material 600 through the first sampling port 510.
In this embodiment, in order to facilitate the quick installation and the test of multichannel FBG610, avoid an optical fiber to test alone, improve whole detection efficiency, carry out preliminary plastic to multichannel FBG610 earlier, pass through step S11 promptly, set up the corresponding interface that awaits measuring respectively at multichannel FBG 610' S both ends, like third interface 621 and the fourth interface 622 that awaits measuring, form a material 600 that awaits measuring that can directly pack into testing arrangement, in actual test, the third interface 621 that awaits measuring of material 600 that awaits measuring directly or indirectly inserts first interface 410 that awaits measuring, and the fourth interface 622 that awaits measuring the material directly or indirectly inserts in the second interface that awaits measuring, make whole light path switch on.
Specifically, the light output port of the light source 100, the light input port of the first optical splitting assembly 200, the light output port of the first optical splitting assembly 200, the first optical channel 310, the first interface to be tested 410, the third interface to be tested 621, an optical fiber of the multi-channel FBG610, the fourth interface to be tested 622, the second interface to be tested, the sampling port of the optical power unit 500, and the optical power unit 500 are sequentially communicated, and light is transmitted through the communicated optical path. Referring to step S21 and step S22, the optical signal needs to pass through a bragg grating in an optical fiber of the material 600 to be tested and then enter the optical power unit 500, so as to obtain the power change of the optical signal, thereby completing the test.
The core idea of the invention is that each channel of the multi-channel FBG610 is detected by the optical power detection mode, so that all channels are detected at one time, and the detection efficiency is improved.
In this embodiment, the first light splitting assembly 200 is a 1 × 16 light splitting device, and 9 light outlets of the first light splitting assembly 200 are communicated with 9 first optical channels 310, and since 9 light outlets need to be led out, the first light splitting assembly is implemented by a standard 1 × 16 light splitting device, and is implemented by using 9 light outlets, so that the production and manufacturing cost is reduced, and the 9 light splitting devices do not need to be customized additionally. Similarly, the multi-channel FBG610 is a 9-channel structure, and the rapid detection of the 9-channel FBG is realized at one time through the testing device.
In this embodiment, the optical power unit 500 is a multi-channel optical power meter (optical power meter) that is an instrument for measuring absolute optical power or relative loss of optical power through a length of optical fiber.
As shown in fig. 4, the present invention provides a preferred embodiment of a second light splitting assembly 321 and a second optical channel 322.
The testing apparatus further includes a plurality of second optical splitters 321 and a plurality of second optical channels 322, each of the first optical channels 310 is provided with a second optical splitter 321, and one end of each of the second optical channels 322 is communicated with a splitting end of the second optical splitter 321, an optical signal is split by the second optical splitters 321, a part of the optical signal is emitted along the first optical channel 310 to form a transmission channel, and a part of the optical signal is emitted along the second optical channel 322 to form a reflection channel.
Each first optical channel 310 is provided with a second light splitting component 321 which can be split into at least two paths, one path of light is transmitted and transmitted along the first optical channel 310, and the other path of light is reflected and transmitted along the second optical channel 322, wherein the plurality of first optical channels 310 form the transmission detection of the multi-channel FBG610, and the plurality of second optical channels 322 form the emission detection of the multi-channel FBG610, so as to satisfy the detection standard and realize the multi-path transmission and reflection detection of the multi-channel FBG 610.
Specifically, the optical power unit 500 is provided with multiple second sampling ports 520, multiple second optical channels 322 are also converged into another first interface to be tested 410, and multiple second sampling ports 520 are also converged into another second interface to be tested 420; wherein, the steps of the test method include: respectively connecting a third interface 621 to be tested and a fourth interface 622 to be tested of the material 600 to be tested into the first interface 410 to be tested of the second optical channel 322 and the second interface 420 to be tested of the second sampling port 520; one of the second optical channels 322 is connected and matched with the corresponding optical fiber in the multi-channel FBG610 through the first interface to be tested 410 and the third interface to be tested 621, and one optical fiber in the multi-channel FBG610 is connected and matched with the second sampling port 520 of the corresponding path through the second port to be tested 420 and the fourth interface to be tested 622; turning on the light source 100 and generating an optical signal, and splitting the light into the corresponding first optical channel 310 through the first light splitting element 200, then entering the corresponding second optical channel 322 through the second light splitting element 321, and entering the optical power unit 500 through the corresponding optical fiber and the second sampling port 520; the optical power unit 500 samples and obtains optical power data of the material 600 to be measured through the second sampling port 520.
The principle of optical transmission detection of the second optical channel 322 is substantially the same with respect to optical transmission detection of the first optical channel 310 and will not be described one by one here. The first interface 410 to be tested and the second interface 420 to be tested form two testing positions, one is a first testing position based on the first optical channel 310, and the other is a second testing position based on the second optical channel 322, and the material 600 to be tested needs to be inserted into the first testing position and the second testing position respectively to realize the testing.
Of course, other preferences are also possible.
For example, the second beam splitting component 321 is an active controllable beam splitting device, and can be actively and selectively transmitted to the first optical channel 310 or reflected to the second optical channel 322. And, the testing arrangement still includes two integrated controllable devices, set up with two first interfaces 410 and two second interfaces to be tested integrated respectively, two integrated controllable devices can also be directly communicate with the both ends of the material 600 that awaits measuring, insert the first optical channel 310 of the access of the material 600 that awaits measuring through integrated controllable device, also can insert the second optical channel 322, do not need twice dismouting in the testing process, direct dismouting directly realizes transmission detection and reflection detection.
In this embodiment, the first interface to be tested 410 and the third interface to be tested 621 are an MPO male connector and an MPO female connector respectively, and the second interface to be tested 622 and the fourth interface to be tested are also an MPO male connector and an MPO female connector respectively, and the MPO male connector and the MPO female connector are connected through an MPO adapter. Among them, the MPO connector is one of the types of optical fiber connectors, and a connector type that is often used as a high-speed transmission standard, such as the IEEE 802.3bm standard for 40G/100G transmission, or the like.
The invention mainly utilizes the characteristic of convenient installation and disassembly of the MPO connector and other matched structures, belongs to a standard component, and improves the detection efficiency of a multi-channel FBG 610.
Further, the step of installing the third interface 621 to be tested and the fourth interface 622 to be tested at two ends of the multi-channel FBG610 to be tested respectively includes: two ends of the multi-channel FBG610 are aligned and assembled to the third interface to be tested 621 and the fourth interface to be tested 622, respectively, by using the optical fiber aligner. In practice, the two ends of the multi-channel FBG610 are aligned and assembled into the MPO male connector or the MPO female connector respectively by using the optical fiber aligner. The fiber aligner, also referred to as a ribbon aligner, a ribbon clamp, a fiber alignment coupler, etc., is used to connect the FC tip of the ribbon multimode pigtail to a multi-channel tester, such as a multi-channel FBG 610. Specifically, the ribbon optical fiber of the tested device is clamped by a ribbon clamp and sequentially placed into a hot stripper and a cutter, the ribbon optical fiber is placed at the movable end of a ribbon optical fiber aligner after hot stripping and cutting, the movable end freely moves to enable the optical fiber in a V groove to be automatically butted, and then the tester is observed, so that all indexes of the tested device can be tested.
As shown in FIGS. 5 and 6, the preferred embodiment of the present invention provides a scanning light source
The light source 100 is a scanning light source, and the testing method includes the steps of:
step S31, the optical power unit 500 is started when the scanning light source generates a rising edge pulse of the optical signal;
and S32, starting a timing function of the internal FPGA530 to realize timing sampling of the optical power data.
The optical power unit 500 triggers the scan mode in synchronization with the scanning light source. The core scheme is that the optical signal of scanning formula light source produces and optical power unit 500's collection goes on in step to in every optical signal can both be gathered and carry out correlation processing, improve detection efficiency, and realize that the trigger point that both are synchronous produces the rising edge pulse of optical signal for scanning formula light source, when obtaining the rising edge of pulse signal, think that optical signal produces, and can reach optical power unit 500's corresponding sample connection through corresponding light path channel, optical power unit 500 should store, handle the data that the sample connection was gathered this moment.
The FPGA530 (Field Programmable Gate Array) is a product of further development based on Programmable devices such as PAL (Programmable Array logic) and GAL (general Array logic). The circuit is a semi-custom circuit in the field of Application Specific Integrated Circuits (ASIC), not only overcomes the defects of the custom circuit, but also overcomes the defect that the number of gate circuits of the original programmable device is limited.
In this embodiment, the testing method includes the steps of: the optical power unit 500 performs sampling and data processing synchronously through the internal FIFO540, and at the moment when the scanning of the scanning light source is finished, the optical power unit 500 has completed sampling all the voltage data and has completely converted the voltage data into mW optical power. The FIFO540 is an abbreviation of First Input First Output, a First in First out queue, which is a traditional sequential execution method, an instruction entered First completes and retires First, and then executes a second instruction. The FIFO540 may allow fast storage and fast processing, satisfying the conditions for simultaneous sampling and data processing.
In order to further optimize the processing efficiency, the testing apparatus further includes a processing computer 700, the optical power unit 500 is connected to the processing computer 700 through a transmission bus, a decoding module is built in the processing computer 700, and the processing computer 700 acquires the optical power data transmitted by the optical power unit 500 and performs synchronous decoding through the decoding module to acquire corresponding data information. The processing computer 700 is further connected to the scanning light source, and the processing computer 700 controls the scanning light source to generate new optical signals after the decoding operation is completed, so as to trigger the scanning mode of the optical power unit 500, thereby implementing uninterrupted scanning.
Specifically, under the control of the processing computer 700, the optical power unit 500 and the scanning light source are synchronously matched to realize rapid sampling of optical signals, and meanwhile, the internal FPGA530 and the FIFO540 are combined to realize rapid acquisition of data, and synchronously transmitted to the processing computer 700, and the corresponding optical power data is obtained by direct decoding, and after one round of operation is completed, the above operations are repeated to obtain optical power data of multiple scans.
The processing computer 700 is commonly called a computer, is a modern electronic computing machine for high-speed computing, can perform numerical computation and logic computation, and has a memory function. The intelligent electronic device can be operated according to a program, and can automatically process mass data at a high speed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as embodying the invention in a wide variety of equivalent variations and modifications within the scope of the appended claims.
Claims (10)
1. The testing method of the multi-channel FBG is characterized by comprising a testing device, wherein the testing device comprises a light source, a first light splitting component, a first optical channel, an optical power unit, a first interface to be tested and a second interface to be tested, the light source generates an optical signal, the optical signal passes through the first light splitting component and is divided into multiple paths, and the multiple paths of optical signal are transmitted through multiple paths of first optical channels, the first optical channels are converged into the first interface to be tested, the optical power unit is provided with multiple paths of first sampling ports, and the multiple paths of first sampling ports are converged into the second interface to be tested;
the testing method comprises the following steps:
a third interface to be tested and a fourth interface to be tested are respectively arranged at two ends of the multi-channel FBG to be tested to form a material to be tested;
respectively connecting a third interface to be tested and a fourth interface to be tested of a material to be tested into a first interface to be tested and a second interface to be tested; the first optical channel is connected and matched with a corresponding optical fiber in the multi-channel FBG through a first interface to be tested and a third interface to be tested, and an optical fiber in the multi-channel FBG is connected and matched with a first sampling port of a corresponding path through a second port to be tested and a fourth port to be tested;
the light source is started, an optical signal is generated, the light is split into the corresponding first optical channel through the first light splitting assembly, and the light is incident to the optical power unit through the corresponding optical fiber and the first sampling port;
the optical power unit samples and obtains optical power data of the material to be detected through the first sampling port.
2. The test method of claim 1, wherein: the testing device further comprises a plurality of second light splitting assemblies and a plurality of second optical channels, each first optical channel is provided with one second light splitting assembly, one end of each second optical channel is communicated with the light splitting end of each second light splitting assembly, optical signals are split through the second light splitting assemblies, part of the optical signals are emitted along the first optical channels to form transmission channels, and part of the optical signals are emitted along the second optical channels to form reflection channels.
3. The method according to claim 1, wherein the optical power unit is provided with a plurality of second sampling ports, the plurality of second optical channels are also converged into another first interface to be tested, and the plurality of second sampling ports are also converged into another second interface to be tested; wherein the content of the first and second substances,
the testing method comprises the following steps:
respectively connecting a third interface to be tested and a fourth interface to be tested of the material to be tested into a first interface to be tested of a second optical channel and a second interface to be tested of a second sampling port; the second optical channel is connected and matched with a corresponding optical fiber in the multi-channel FBG through the first interface to be tested and the third interface to be tested, and an optical fiber in the multi-channel FBG is connected and matched with the second sampling port of the corresponding path through the second port to be tested and the fourth interface to be tested;
the light source is started, an optical signal is generated, the light is split into the corresponding first optical channel through the first light splitting assembly, then the light is incident into the corresponding second optical channel through the second light splitting assembly, and then the light is incident into the optical power unit through the corresponding optical fiber and the second sampling port;
and the optical power unit samples and acquires optical power data of the material to be detected through the second sampling port.
4. A test method according to any one of claims 1 to 3, characterized in that: the first interface to be tested and the third interface to be tested are respectively an MPO male connector and an MPO female connector, the second interface to be tested and the fourth interface to be tested are also respectively an MPO male connector and an MPO female connector, and the MPO male connector and the MPO female connector are connected through MPO adapters.
5. The testing method according to claim 4, wherein the step of respectively installing a third interface to be tested and a fourth interface to be tested at two ends of the multi-channel FBG to be tested comprises:
and respectively aligning and assembling two ends of the multi-channel FBG to the third interface to be tested and the fourth interface to be tested by using the optical fiber aligner.
6. The testing method of claim 1, wherein the light source is a scanning light source, and the steps of the testing method comprise:
the optical power unit is started when the scanning light source generates rising edge pulses of optical signals, and the timing function of an internal FPGA is started to realize timing sampling of optical power data;
the optical power unit and the scanning light source synchronously trigger the scanning mode.
7. The testing method of claim 6, wherein the steps of the testing method comprise: the optical power unit synchronously performs sampling and data processing through an internal FIFO, and finishes sampling all voltage data and completely converts the voltage data into mW optical power at the moment when the scanning of the scanning light source is finished.
8. The test method of claim 7, wherein: the testing device further comprises a processing computer, the optical power unit is connected with the processing computer through a transmission bus, a decoding module is arranged in the processing computer, and the processing computer is used for obtaining optical power data transmitted by the optical power unit and synchronously decoding the optical power data through the decoding module to obtain corresponding data information.
9. The test method of claim 8, wherein: the processing computer is also connected with the scanning type light source, and the processing computer respectively controls the scanning type light source to generate new optical signals after decoding operation is completed so as to trigger the scanning mode of the optical power unit and realize uninterrupted scanning.
10. A test method according to any one of claims 1 to 3, characterized in that: the first light splitting component is a 1 × 16 light splitting device, and 9 light outlets of the first light splitting component are communicated with 9 paths of first optical channels.
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