An optical splitter multi-channel insertion loss test system
Patent Information
- Application Number
- CN202522085826.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-09-28
AI Technical Summary
[0004]随着光通信网络的大规模建设和升级，对光分路器的需求日益增长，传统的手动测试方式存在测试效率低、人工误差大、测试一致性难以保证等问题，无法满足规模化生产和高质量检测的需求
[0020]与现有技术相比，本实用新型的有益效果是：该系统功能集成度高，结构复杂，但能够同时实现插损和回损的测试，无需分别使用不同设备进行测试，同时通过软件处理后避免进行缠绕处理等复杂动作，减少了测试设备的投入成本，同时也简化了测试流程，提高了测试效率。
Smart Images
Figure CN224843775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an optical communication technology, specifically a multi-channel insertion and return loss testing system for optical splitters. Background Technology
[0002] With the rapid development of optical communication technology, optical splitters, as key passive devices in optical networks, directly affect the transmission quality and stability of optical communication systems.
[0003] Insertion loss (IL) and return loss (RL) are important parameters for evaluating the performance of optical splitters. Accurate and efficient testing of these two parameters is crucial for the production, research and development, and quality control of optical splitters.
[0004] With the large-scale construction and upgrading of optical communication networks, the demand for optical splitters is increasing. Traditional manual testing methods have problems such as low testing efficiency, large human error, and difficulty in ensuring test consistency, which cannot meet the needs of large-scale production and high-quality testing. Utility Model Content
[0005] The purpose of this invention is to provide a multi-channel insertion and return loss testing system for optical splitters to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A multi-channel insertion and return loss testing system for optical splitters includes:
[0008] Light source module, the light source module is used to output light signals;
[0009] An optical switch module, which is connected to the light source module, is used to quickly switch optical paths to transmit and test optical signals from multiple channels in parallel.
[0010] A polarization control module, which is connected to the optical switch module, is used to dynamically change the polarization state of the transmitted light;
[0011] The reflective module, comprising multiple reflective modules, is connected to the polarization control module to reverse the optical signals of each node in the multi-channel system.
[0012] The beam splitter module is also connected to the optical switch module and is connected to multiple reflection modules for uniformly dispersing and transmitting optical signals from multiple channels.
[0013] A multi-channel power meter, which is connected to multiple reflection modules, is used to measure the power of the optical signal output from the reflection module corresponding to each channel.
[0014] The optical splitter multi-channel insertion and return loss test system described above further includes a data processing and control module, which communicates with the multi-channel power meter.
[0015] The optical splitter multi-channel insertion loss test system described above: the light source module includes multiple modules that can output optical signals of different wavelengths.
[0016] The optical splitter multi-channel insertion and return loss test system described above: The optical switch module is a matrix structure formed by high-speed optical switches, which can quickly switch the optical signal output by the light source module between the splitting module and the polarization control module.
[0017] The optical splitter multi-channel insertion and return loss test system described above: the optical switch module includes a first access point and a second access point, wherein the first access point is used to connect to the polarization control module and the second access point is used to connect to the beam splitting module.
[0018] The optical splitter multi-channel insertion loss test system described above includes a test fixture between the polarization control module and the reflection module, which connects the device under test to the polarization control module and the reflection module.
[0019] The optical splitter multi-channel insertion and return loss test system described above: the fixture under test is fused to the polarization control module and the reflection module through the first fusion point and the second fusion point, respectively.
[0020] Compared with the prior art, the beneficial effects of this utility model are: the system has a high degree of functional integration and a complex structure, but it can simultaneously perform insertion loss and return loss testing without the need to use different equipment for testing. At the same time, through software processing, it avoids complex actions such as winding, reduces the investment cost of testing equipment, simplifies the testing process, and improves testing efficiency.
[0021] Furthermore, the system provides a user-friendly interface for easy setting of test parameters, starting tests, and viewing results. It integrates data storage and retrieval, and can generate data reports according to customer requirements, satisfying the needs of large-scale production and high-quality testing. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of a multi-channel insertion and return loss test system for optical splitters.
[0023] Figure 2 This is a diagram of the optical path structure for a traditional insertion loss test.
[0024] Figure 3 This is a diagram of the optical path structure for traditional return loss testing.
[0025] In the diagram: 1-Light source module; 2-Optical switch module; 3-Polarization control module; 4-First fusion splice; 5-Test fixture; 6-Second fusion splice; 7-Reflection module; 8-Spectroscopy module; 9-Multi-channel power meter. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0027] Please see Figure 1 As one embodiment of this utility model, the optical splitter multi-channel insertion and return loss testing system includes:
[0028] Light source module 1, which is used to output light signals;
[0029] Optical switch module 2, which is connected to the light source module 1, is used to quickly switch the optical path so as to transmit and test optical signals from multiple channels in parallel.
[0030] Polarization control module 3, which is connected to optical switch module 2, is used to dynamically change the polarization state of the transmitted light;
[0031] The reflection module 7, which consists of multiple modules, is connected to the polarization control module 3 to reverse the optical signals of each node in the multi-channel system.
[0032] The beam splitter 8 is also connected to the optical switch module 2 and is connected to multiple reflection modules 7, and is used to uniformly distribute and transmit optical signals from multiple channels.
[0033] A multi-channel power meter 9 is connected to multiple reflection modules 7 and is used to measure the power of the optical signal output from the reflection module 7 corresponding to each channel.
[0034] The principle is roughly as follows:
[0035] 1. Insertion Loss Test Procedure: The optical signal emitted by the light source module 1 is switched to the polarization control module 3 via the optical switch module 2. After passing through the polarization control module 3, it enters the input port of the product under test on the fixture 5. After passing through the product under test, the optical signal is detected and received by the multi-channel power meter 9. The multi-channel power meter 9 measures the optical power of the input port of the product under test and each output port of the multi-channel. The insertion loss of each channel is calculated according to the formula IL = -10log(PoutX / Pin), where PoutX is the optical power of the X output channel and Pin is the optical power of the input channel.
[0036] 2. Return Loss Test Procedure: The optical signal emitted by the light source module 1 is switched by the optical switch module 2 to the beam splitter module 8. After passing through the beam splitter module 8, the signal is evenly split and transmitted. The first transmission passes through the reflection module 7 and reaches the product under test. The reflected optical signal from the product under test is then reflected back and passes through the reflection module 7 a second time before being received by the multi-channel power meter 9. The multi-channel power meter 9 measures the reflected optical power and, in conjunction with the output optical power of the light source module 1, calculates the return loss using the formula RL = -10log(PrefX / Pin), where PrefX is the reflected optical power of the X output channel and Pin is the optical power of the input channel.
[0037] In addition, when the test system is started up or during regular maintenance, a standard optical splitter is used to calibrate the system. The standard optical splitter is connected to the test system, and its insertion loss and return loss are measured according to the above-mentioned insertion loss test procedure (i.e., insertion loss test procedure) and return loss test procedure (i.e., return loss test procedure). The results are compared with the standard values. Based on the comparison results, parameters such as the system's light source power and optical power meter measurement accuracy are calibrated and adjusted to ensure the accuracy and reliability of the test system, thereby improving test efficiency.
[0038] As a further embodiment of this utility model, the optical splitter multi-channel insertion and return loss test system also includes a data processing and control module (not shown in the figure). The data processing and control module communicates with the multi-channel power meter 9 and is used to control the entire test process, including controlling the light source module, optical switch module, polarization control module and optical power detection module, and calculating the insertion loss and return loss values of each channel of the optical splitter based on the collected optical power data.
[0039] As a further embodiment of this invention, the light source module 1 includes multiple modules capable of outputting light signals of different wavelengths.
[0040] By outputting light signals of different wavelengths, the test objects covered by the light source module 1 are made more extensive and its applicability is stronger.
[0041] As a further embodiment of this invention, the optical switch module 2 is formed by a matrix structure of high-speed optical switches to enable rapid switching of optical paths, allowing the optical signal output by the light source module 1 to be quickly switched between the beam splitting module 8 and the polarization control module 3.
[0042] As a further embodiment of this invention, the optical switch module 2 includes a first access point and a second access point, wherein the first access point is used to connect to the polarization control module 3 and the second access point is used to connect to the beam splitting module 8.
[0043] The optical switch module 2 can quickly switch between the first access point and the second access point.
[0044] As a further embodiment of this invention, a test fixture 5 is provided between the polarization control module 3 and the reflection module 7, and the test fixture 5 connects the device under test to the polarization control module 3 and the reflection module 7.
[0045] The product under test is connected to the polarization control module 3 through the test fixture 5, and then connected to the multi-channel power meter 9 under the action of the reflection module 7.
[0046] As a further embodiment of this utility model, the test fixture 5 is fused to the polarization control module 3 and the reflection module 7 through the first fusion point 4 and the second fusion point 6, respectively.
[0047] To better illustrate the shortcomings of existing technologies, we will now combine... Figure 2 and Figure 3 To explain, among other things, Figure 2 The optical path structure diagram for traditional insertion loss (IL) testing is given. Figure 3 The optical path structure diagram for traditional return loss (IL) testing is given;
[0048] Traditional methods for testing the insertion loss and return loss of optical splitters have many drawbacks, as follows:
[0049] 1. The test equipment has a single function and cannot perform efficient testing of insertion loss and return loss at the same time. Different equipment needs to be used for testing, which not only increases the testing cost but also extends the testing cycle.
[0050] 2. It can only perform single-channel testing. For multi-channel optical splitters, each channel needs to be tested individually, which is extremely inefficient and cannot meet the needs of large-scale production and testing.
[0051] 3. The test accuracy is insufficient, and it is affected by various factors such as the test environment and human factors, resulting in poor accuracy and reliability of the test results.
[0052] 4. Traditional testing methods test each channel independently, which cannot determine the uniformity between channels.
[0053] 5. Traditional testing methods test each channel independently, which cannot determine the wavelength-dependent loss between channels.
[0054] 6. Traditional return loss testing requires winding the relevant channel pigtails, resulting in low testing efficiency.
[0055] 7. Traditional testing methods cannot save test data and cannot meet the requirements for product data traceability.
[0056] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.
Claims
1. A multi-channel insertion and return loss testing system for optical splitters, characterized in that, include: Light source module (1), the light source module (1) is used to output light signals; Optical switch module (2), which is connected to the light source module (1), is used to quickly switch the optical path so as to transmit and test the optical signals of multiple channels in parallel; Polarization control module (3), which is connected to the optical switch module (2), is used to dynamically change the polarization state of the transmitted light; The reflection module (7) consists of multiple modules, each connected to the polarization control module (3) to transmit the optical signals of each node in the multi-channel in reverse. The beam splitting module (8) is also connected to the optical switch module (2) and connected to multiple reflection modules (7) for uniformly dispersing and transmitting optical signals from multiple channels; A multi-channel power meter (9) is connected to multiple reflection modules (7) and is used to measure the power of the optical signal output in the reflection module (7) corresponding to each channel. The optical splitter multi-channel insertion and return loss test system also includes a data processing and control module. The data processing and control module communicates with the multi-channel power meter (9) and is used to control the entire test process, including the control of the light source module (1), the optical switch module (2), the polarization control module (3) and the optical power detection module, as well as to calculate the insertion loss and return loss values of each channel of the optical splitter based on the collected optical power data.
2. The optical splitter multi-channel insertion-back loss testing system according to claim 1, characterized in that, The light source module (1) includes multiple modules that can output light signals of different wavelengths.
3. The optical splitter multi-channel insertion-back loss testing system according to claim 1, characterized in that, The optical switch module (2) is a matrix structure formed by high-speed optical switches, which can quickly switch the optical signal output by the light source module (1) between the beam splitting module (8) and the polarization control module (3).
4. The optical splitter multi-channel insertion-back loss testing system according to claim 3, characterized in that, The optical switch module (2) includes a first access point and a second access point, wherein the first access point is used to connect to the polarization control module (3) and the second access point is used to connect to the beam splitting module (8).
5. The optical splitter multi-channel insertion-back loss testing system according to claim 1, characterized in that, A test fixture (5) is also provided between the polarization control module (3) and the reflection module (7), and the test fixture (5) connects the device under test to the polarization control module (3) and the reflection module (7).
6. The optical splitter multi-channel insertion-back loss testing system according to claim 5, characterized in that, The test fixture (5) is connected to the polarization control module (3) and the reflection module (7) by the first fusion point (4) and the second fusion point (6), respectively.