CN114726435A - Passive optical device test system - Google Patents
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- CN114726435A CN114726435A CN202210295381.5A CN202210295381A CN114726435A CN 114726435 A CN114726435 A CN 114726435A CN 202210295381 A CN202210295381 A CN 202210295381A CN 114726435 A CN114726435 A CN 114726435A
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- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
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Abstract
The invention belongs to the field of optical device performance testing, and particularly relates to a passive optical device testing system which comprises a light source module, an optical power meter module, a testing module and a computer control module, wherein the testing module of the passive optical device testing system can realize bidirectional work of a light path, simplifies the testing steps, and in the process of testing passive optical devices such as a wavelength division multiplexer by using the system, after a first light source line and a second light source line are welded with ports of the passive optical devices, optical fiber welding points do not need to be disconnected for many times, channels do not need to be divided for many times for welding tests, a plurality of channels do not need to be repeatedly inserted into the optical power meter module through an adapter, the whole subsequent testing process can be completed only through one-time welding, the testing steps are greatly simplified, the system is convenient and fast, has high precision, and can be quickly mastered by testing personnel, and is easy to train and master, is suitable for mass production.
Description
Technical Field
The invention relates to the technical field of optical device performance testing, in particular to a passive optical device testing system.
Background
In a transmission system of optical fiber communication, in addition to necessary optical terminal equipment, electrical terminal equipment and optical fiber, various auxiliary devices are required in a transmission line to realize various functions such as connection, coupling, switching/splitting, line switching, protection and the like between optical fibers or between optical fibers and optical terminals. Compared with optoelectronic devices, such as semiconductor lasers, light emitting diodes, photodiodes, and optical fiber amplifiers, which are optical "active devices", the optical devices that do not emit light, do not amplify, and do not generate photoelectric conversion are often referred to as optical "passive devices". Passive devices are various in types, functions and forms, but are indispensable devices with strong usability in optical fiber communication networks.
Taking a wavelength division multiplexer as an example, the wavelength division multiplexer is used as an important passive device in an optical communication technology, and under the environment of rapid development of a global optical network, the wavelength division multiplexer is widely applied to the construction, updating and upgrading of the optical network. The excellence of the performance parameters of the wavelength division multiplexer directly affects the signal quality in the optical network system.
In the optical communication industry, various manufacturers need to test the performance of passive optical devices such as wavelength division multiplexers during the production process. According to the national standard general specification of the optical fiber wavelength division multiplexer demultiplexer and the industry specification of optical fiber communication devices, the main performance parameter test items of the wavelength division multiplexer are as follows: transmission-side insertion loss (T-IL), reflection-side insertion loss (R-IL), transmission isolation (T-ISO), reflection isolation (R-ISO), return loss RL, directivity DIR, Polarization Dependent Loss (PDL), and high and low temperature thermal stability.
The performance test of the existing passive optical device usually adopts manual test, needs to be welded many times according to different steps, manually selects different light sources many times, monitors different power meter parameters, repeatedly inserts different ports into a power meter through an adapter, and has the disadvantages of complex steps, low efficiency, low precision and easy error.
Disclosure of Invention
The embodiment of the invention provides a passive optical device testing system, which is used for solving the technical problems that the performance test of the conventional passive optical device usually adopts manual test, the steps are complicated, the efficiency is low, the accuracy is not high enough, and errors are easy to occur.
To achieve the above object, the present invention provides a passive optical device testing system, including:
the light source module is used for providing laser with stable power of various wavelengths;
the optical power meter module is provided with a plurality of detection ports and is used for measuring optical power;
the test module comprises a total one-to-two optical splitter, an optical switch, a first one-to-two optical splitter, a second one-to-two optical splitter and a polarization controller, wherein the input end of the total one-to-two optical splitter is connected with the output end of the light source module, and the first one-to-two optical splitter and the second one-to-two optical splitter are respectively connected with two output ends of the total one-to-two optical splitter through the optical switch; one output end of the first one-to-two optical splitter is connected with a detection port, the other output end of the first one-to-two optical splitter is connected with a first light source wire used for connecting a device to be detected, and the polarization controller is arranged on the first light source wire in series; one output end of the second one-to-two optical splitter is connected with the other detection port, and the other output end of the second one-to-two optical splitter is connected with a second light source wire used for connecting a device to be detected; and
and the computer control module is used for controlling the laser output wavelength of the light source module, the optical path selection of the optical switch, the change of the polarization state of the laser by the polarization controller, and receiving and processing the data measured by the optical power meter module.
Optionally, the optical switch is a 2 × 2 optical switch, two input terminals of the 2 × 2 optical switch are respectively connected to two output terminals of the total one-to-two optical splitter, and two output terminals of the 2 × 2 optical switch are respectively connected to an input terminal of the first one-to-two optical splitter and an input terminal of the second one-to-two optical splitter.
Optionally, the optical power meter module comprises a plurality of optical power meters.
Optionally, the optical power meter is a multi-channel optical power meter.
Optionally, the light source module includes N light sources with different wavelengths and an N × 1 optical switch, an output end of each light source is correspondingly connected to an input end of the N × 1 optical switch, and an output end of the N × 1 optical switch is connected to an input end of the total one-to-two optical splitter.
Optionally, the output end of the first one-to-two optical splitter and the detection port, and the output end of the second one-to-two optical splitter and the detection port are connected by an optical fiber jumper respectively.
Optionally, the detection port is an FC/APC interface, and the connector of the optical fiber patch cord is an FC/APC connector.
Optionally, the optical device to be tested is a multi-channel passive optical device or a single-channel passive optical device.
Optionally, the optical device to be tested is a three-port wavelength division multiplexer, a common terminal of the three-port wavelength division multiplexer is connected to the first optical source line, a transmission terminal of the three-port wavelength division multiplexer is connected to the second optical source line, and a reflection terminal of the three-port wavelength division multiplexer is connected to a detection port.
Optionally, the optical device to be tested is a single-channel optical isolator, an input end of the single-channel optical isolator is connected to the first light source line, and an output end of the single-channel optical isolator is connected to the second light source line.
The passive optical device test system provided by the invention has the beneficial effects that: compared with the prior art, the test module of the passive optical device test system can realize bidirectional work of an optical path, simplifies test steps, does not need to disconnect optical fiber fusion points for many times after the first light source line and the second light source line are fused with ports of the passive optical device in the process of testing the passive optical devices such as a wavelength division multiplexer by using the system, does not need to divide channels for multiple fusion tests, does not need to repeatedly insert a plurality of channels into an optical power meter module through an adapter, can complete the whole subsequent test process only by once fusion, greatly simplifies the test steps, greatly reduces test differences caused by manual operation, can read and calculate all parameters through a computer control module, is convenient and quick, has high precision, can be quickly mastered by a tester, is easy to train and master, and is suitable for mass production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a schematic diagram of a passive optical device testing system according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an internal optical path of a test module in a passive optical device testing system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an internal optical path of a light source module in a passive optical device testing system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a passive optical device testing system testing three-port wavelength division multiplexer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a passive optical device testing system testing four-port wavelength division multiplexer according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a passive optical device testing system for testing a single-channel optical isolator according to an embodiment of the present invention.
Description of the main element symbols:
10. an optical device to be tested;
100. a light source module; 110. a light source; 120. an Nx 1 optical switch;
200. an optical power meter module;
300. a test module; 301. a first light source line; 302. a second light source line; 310. a one-to-two optical splitter; 320. an optical switch; 330. a first one-to-two optical splitter; 340. a second one-to-two optical splitter; 350. a polarization controller;
400. a computer control module;
500. an optical fiber jumper; 510. a connecting head.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As described in the background art, the performance test of the conventional passive optical device usually adopts manual test, and needs to be performed by welding for many times according to different steps, manually select different light sources for many times, monitor different power meter parameters, and repeatedly insert different ports into a power meter through an adapter, so that the steps are complicated, the efficiency is low, the accuracy is not high enough, and errors are easy to occur.
In order to solve the above problems, embodiments of the present invention provide a passive optical device test system, as shown in fig. 1-2, including a light source module 100, an optical power meter module 200, a test module 300, and a computer control module 400; the light source module 100 is used for providing stable power laser light with multiple wavelengths; the optical power meter module 200 has a plurality of detection ports, and the optical power meter module 200 is used for measuring optical power; the test module 300 includes a total one-to-two optical splitter 310, an optical switch 320, a first one-to-two optical splitter 330, a second one-to-two optical splitter 340, and a polarization controller 350, wherein an input end of the total one-to-two optical splitter 310 is connected to an output end of the light source module 100, and the first one-to-two optical splitter 330 and the second one-to-two optical splitter 340 are respectively connected to two output ends of the total one-to-two optical splitter 310 through the optical switch 320; one output end of the first one-to-two optical splitter 330 is connected to a detection port, the other output end is connected to a first light source line 301 for connecting the device to be detected 10, and the polarization controller 350 is serially arranged on the first light source line 301; one output end of the second one-to-two optical splitter 340 is connected to the other detection port, and the other output end is connected to a second optical line 302 for connecting the device to be detected 10; the computer control module 400 is used for controlling the laser output wavelength of the light source module 100, the optical path selection of the optical switch 320, the change of the polarization state of the laser by the polarization controller 350, and receiving and processing the data measured by the optical power meter module 200.
In the embodiment of the present invention, the testing module 300 of the passive optical device testing system can implement bidirectional operation of optical paths, simplify the testing steps, and in the process of testing passive optical devices such as a wavelength division multiplexer by using the system, after the first light source line 301 and the second light source line 302 are welded to the ports of the passive optical devices, there is no need to disconnect the optical fiber fusion splice points multiple times, there is no need to branch channels for multiple fusion tests, there is no need to repeatedly insert multiple channels into the optical power meter module 200 through adapters, the whole subsequent testing process can be completed only by one-time welding, the testing steps are greatly simplified, the testing difference caused by manual operation is greatly reduced, and each parameter is read and calculated through the computer control module 400, so that the method is convenient and rapid, has high precision, can be used by testers quickly, is easy to train and master, and is suitable for mass production.
The light source module 100, the test module 300, and the optical power meter module 200 may be connected to the computer control module 400 through serial lines of RS232 to USB, the computer control module 400 has a control software to control the test program of the optical device 10 to be tested, and the control software controls the states of the elements to automatically collect data, calculate, and test various index parameters of the optical device 10 to be tested.
Taking the test of each performance of a three-port Wavelength Division multiplexer (hereinafter referred to as "1 × 2 WDM", where WDM is an abbreviation of Wavelength Division multiplexer, and the english acronym of Wavelength Division Multiplexing), as an example, the test flow of the test system is as follows:
1. setting parameters and calibrating source power;
2. connecting a light path: as shown in fig. 4, the first optical line 301 is welded to the common end of the 1 × 2WDM, the second optical line 302 is welded to the transmission end of the 1 × 2WDM, and the reflection end of the 1 × 2WDM is inserted into the detection port of the optical power meter module 200;
3. and (3) testing software: automatic control switch, reading, calculating, data storage.
With continued reference to fig. 2 and 4, the following describes how the test system can achieve the test of various performance indexes of 1 × 2 WDM:
detecting the insertion loss T-IL of the transmission end:
the control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow light to pass through a line where only the first one-to-two optical splitter 330 is located, allows light to input from a common end of 1 × 2WDM through the first optical source line 301, outputs at a transmission end, detects the power intensity at the moment at the other output end of the second one-to-two optical splitter 340 through the optical power meter module 200, and calculates two power value differences according to the original source power of the line state to obtain the transmission end insertion loss T-IL.
Detecting reflective insertion loss R-IL
The control software controls the light source module 100 to output laser with reflection wavelength, controls the optical switch 320 to allow light to pass through a line where only the first one-to-two optical splitter 330 is located, completely prevents light from passing through a line where the second one-to-two optical splitter 340 is located, allows light to be input only from a common end of 1 × 2WDM through the first optical source line 301, outputs from a reflection end, detects the power intensity of the reflection end inserted into the detection port at the moment through the optical power meter module 200, and then calculates two power value differences according to the original source power of the line state by the control software to obtain the insertion loss R-IL of the reflection end.
Detecting transmission isolation T-ISO:
the control software controls the light source module 100 to output laser with a reflection wavelength, controls the optical switch 320 to allow light to pass through a line where only the first one-to-two optical splitter 330 is located, allows light to be input only from a common end of 1 × 2WDM through the first optical source line 301, outputs at a transmission end, detects the power intensity at the moment of the other output end of the second one-to-two optical splitter 340 through the optical power meter module 200, and calculates two power value differences according to the original source power of the line state to obtain the transmission end isolation T-ISO.
Detecting reflective isolation R-ISO
The control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow light to pass through a line where the first one-to-two optical splitter 330 is located, allows light to be input only from a common end of 1 × 2WDM through the first optical source line 301, outputs from the reflecting end, detects the power intensity of the reflecting end at the moment through the optical power meter module 200, and calculates two power value differences according to the source power of the original line state to obtain the reflecting end isolation degree R-ISO.
Detecting return loss RL
The control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow only the line where the first one-to-two optical splitter 330 is located to have light passing, and the line where the second one-to-two optical splitter 340 is located to have no light passing, detects the power intensity of the other output end of the first one-to-two optical splitter 330 through the optical power meter module 200, and then calculates the return loss RL of the transmission wavelength according to the calibrated source power under the state of the line.
The control software controls the light source module 100 to output laser with a reflection wavelength, controls the optical switch 320 to allow only the line where the first one-to-two optical splitter 330 is located to have light passing, and the line where the second one-to-two optical splitter 340 is located to have no light passing, detects the power intensity of the other output end of the first one-to-two optical splitter 330 through the optical power meter module 200, and then calculates the return loss RL of the reflection wavelength according to the calibrated source power under the state of the line.
The control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow only the line where the second one-to-two optical splitter 340 is located to have light passing, and the line where the first one-to-two optical splitter 330 is located to have no light passing, detects the power intensity of the other output end of the second one-to-two optical splitter 340 through the optical power meter module 200, and then calculates the return loss RL of the transmission wavelength according to the calibrated source power under the state of the line.
Detecting directional DIR
The control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow only the line where the second one-to-two optical splitter 340 is located to have light passing, and the line where the first one-to-two optical splitter 330 is located to have no light passing, detects the power capability intensity of the reflecting end through the optical power meter module 200, and then calculates the DIR of the transmission wavelength according to the calibrated source power under the state of the line.
The control software controls the light source module 100 to output laser with a reflection wavelength, controls the optical switch 320 to allow only the line where the second one-to-two optical splitter 340 is located to have light passing, and the line where the first one-to-two optical splitter 330 is located to have no light passing, detects the power capacity intensity of a reflection end through the optical power meter module 200, and then calculates the DIR of the reflection wavelength according to the calibrated source power under the state of the line.
Detecting polarization dependent loss PDL
The control software controls the light source module 100 to output laser with transmission wavelength, controls the optical switch 320 to allow light to pass through only the line where the first one-to-two optical splitter 330 is located, completely prevents light from passing through the line where the second one-to-two optical splitter 340 is located, allows transmission light energy to be output from the other output end of the second one-to-two optical splitter 340, controls the polarization controller 350 on the first optical source line 301 to work through the control software, monitors the output power intensity change of the other output end of the second one-to-two optical splitter 340, and calculates the polarization-dependent loss PDL of the transmission end through the control software.
The control software controls the light source module 100 to output laser with a reflection wavelength, controls the optical switch 320 to allow light to pass through a line where only the first one-to-two optical splitter 330 is located, and no light passes through a line where the second one-to-two optical splitter 340 is located, and the reflection end outputs transmitted light energy, controls the polarization controller 350 to work through the control software, monitors the output power intensity change of the reflection end, and calculates the polarization-related loss PDL of the reflection end through the software.
Detecting high and low temperature thermal stability
Respectively placing the 1 multiplied by 2WDM into a low-temperature box and a high-temperature box, clicking a software test button after the temperature reaches the requirement, and automatically recalculating the performance parameters of the steps [001] - [007] by software.
Therefore, in the process of testing passive optical devices such as a wavelength division multiplexer by using the test system, the connected optical path does not need to be changed until the whole set of parameters are tested, and the test system is simple, fast and convenient, high in precision and high in efficiency.
In one embodiment, as shown in fig. 2, the optical switch 320 is a 2 × 2 optical switch, two input terminals of the 2 × 2 optical switch are respectively connected to two output terminals of the total one-to-two optical splitter 310, and two output terminals of the 2 × 2 optical switch are respectively connected to an input terminal of the first one-to-two optical splitter 330 and an input terminal of the second one-to-two optical splitter 340.
By using the 2 × 2 optical switch, the computer control module 400 can switch the light to pass through the line where the first one-to-two optical splitter 330 is located or the line where the second one-to-two optical splitter 340 is located by controlling the 2 × 2 optical switch, so that the control is simpler.
Of course, in other embodiments, the optical switch 320 may also be two 1 × 1 optical switches, where both the two 1 × 1 optical switches are connected to the computer control module 400, and under the control of the control software, the optical on/off of the line where the first one-to-two optical splitter 330 is located and the line where the second one-to-two optical splitter 340 is located are respectively controlled.
In one embodiment, as shown in fig. 4, the optical power meter module 200 includes a plurality of optical power meters.
Specifically, the optical power meter module 200 may include 1-8 optical power meters. Preferably, the optical power meter is a multi-channel optical power meter, such as a 4-channel optical power meter, to better detect a multi-channel passive optical device.
In one embodiment, as shown in fig. 2-3, the light source module 100 includes N light sources 110 with different wavelengths and an N × 1 optical switch 120, an output end of each light source 110 is correspondingly connected to an input end of the N × 1 optical switch 120, and an output end of the N × 1 optical switch 120 is connected to an input end of the total one-to-two optical splitter 310.
Specifically, the light sources 110 with different wavelengths include a 1550nm laser light source, a 1310nm laser light source, and a 1490nm laser light source.
In one embodiment, as shown in fig. 1-2, the output end and the detection port of the first two-to-two optical splitter 330 and the output end and the detection port of the second two-to-two optical splitter 340 are connected by an optical fiber jumper 500.
Due to the design, the light path assembly of the system is facilitated.
In one embodiment, the detection port is an FC/APC interface, and the connector 510 of the optical fiber patch cord 500 is an FC/APC connector.
FC is an abbreviation of Ferroue Connector, which shows that the external reinforcement is a metal sleeve, the fastening mode is a turnbuckle, and the FC type Connector has the advantages of firmness, dust resistance and more pluggable times than plastic; APC (Angled Physical Contact) indicates that the fiber end is at an angle of 8 degrees and is polished by grinding the microsphere surface, thereby reducing reflection.
Of course, in other embodiments, the detection port and the connector 510 of the optical fiber patch cord 500 may be FC/APC, SC/APC or LC/APC adapted to each other.
It should be noted that the optical device under test 10 that can be detected by the passive optical device testing system can be a multi-channel passive optical device or a single-channel passive optical device.
Specifically, referring to the detection 1 × 2WDM in the above embodiment, it can be understood that, in the case where the wavelength division multiplexers for detection are 1 × N (N is equal to or greater than 3), such as 1 × 3, 1 × 4, 1 × 8, 1 × 16, and 1 × 18, at least N +1 detection ports of the optical power meter module 200 are required. Taking the detection of 1 × 3WDM as an example, as shown in fig. 5, the optical power meter module 200 has 4 detection ports, a common end of the 1 × 3WDM is fused to the first optical power line 301, a transmission end is fused to the second optical power line 302, and two reflection ends (respectively denoted as reflection end 1 and reflection end 2) are respectively connected to the two detection ports.
When the passive optical device test system is used for detecting a single-channel passive optical device, such as a single-channel optical isolator, as shown in fig. 6, the input end of the single-channel optical isolator is connected to the first optical source line 301, and the output end of the single-channel optical isolator is connected to the second optical source line 302.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples merely represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A passive optical device testing system, comprising:
the light source module is used for providing laser with stable power of various wavelengths;
an optical power meter module having a plurality of detection ports, the optical power meter module for measuring optical power;
the test module comprises a total one-to-two optical splitter, an optical switch, a first one-to-two optical splitter, a second one-to-two optical splitter and a polarization controller, wherein the input end of the total one-to-two optical splitter is connected to the output end of the light source module, and the first one-to-two optical splitter and the second one-to-two optical splitter are respectively connected to the two output ends of the total one-to-two optical splitter through the optical switch; one output end of the first one-to-two optical splitter is connected to one detection port, the other output end of the first one-to-two optical splitter is connected to a first light source wire used for connecting a device to be detected, and the polarization controller is arranged on the first light source wire in series; one output end of the second one-to-two optical splitter is connected to the other detection port, and the other output end of the second one-to-two optical splitter is connected with a second light source wire used for connecting the optical device to be detected; and
and the computer control module is used for controlling the laser output wavelength of the light source module, the optical path selection of the optical switch, the change of the polarization state of the laser by the polarization controller, and receiving and processing the data measured by the optical power meter module.
2. The passive optical device testing system according to claim 1, wherein the optical switch is a 2 x 2 optical switch, two input terminals of the 2 x 2 optical switch are respectively connected to two output terminals of the total one-to-two optical splitter, and two output terminals of the 2 x 2 optical switch are respectively connected to an input terminal of the first one-to-two optical splitter and an input terminal of the second one-to-two optical splitter.
3. A passive optical device test system as claimed in claim 1, wherein the optical power meter module comprises a plurality of optical power meters.
4. A passive optical device test system as claimed in claim 3, wherein the optical power meter is a multi-channel optical power meter.
5. A passive optical device test system as claimed in claim 1, wherein the optical source module includes N optical sources with different wavelengths and an N x 1 optical switch, an output terminal of each optical source is correspondingly connected to an input terminal of the N x 1 optical switch, and an output terminal of the N x 1 optical switch is connected to an input terminal of the total two-to-one optical splitter.
6. The passive optical device test system according to claim 1, wherein the output end of the first one-to-two optical splitter and the detection port are connected by optical fiber jumpers.
7. The passive optical device test system according to claim 6, wherein the detection port is an FC/APC interface, and the connector of the optical fiber jumper is an FC/APC connector.
8. A passive optical device test system according to any of claims 1-7, wherein the device to be tested is a multi-channel passive optical device or a single-channel passive optical device.
9. A passive optical device test system according to claim 8, wherein the device to be tested is a three-port wavelength division multiplexer, a common port of the three-port wavelength division multiplexer is connected to the first optical power line, a transmission port of the three-port wavelength division multiplexer is connected to the second optical power line, and a reflection port of the three-port wavelength division multiplexer is connected to one of the detection ports.
10. A passive optical device testing system as claimed in claim 8, wherein the device to be tested is a single-channel optical isolator, an input end of the single-channel optical isolator is connected to the first optical power line, and an output end of the single-channel optical isolator is connected to the second optical power line.
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