EML TO-CAN component test system and method

Abstract

The invention relates to an EML TO-CAN component test system and method, the system comprises a test board, a multimode fiber, a spectrometer, a height measurement probe and a test platform, and a to-be-tested product EML TO-CAN is plugged on the test board; the height measuring probe is used for moving to the position above the EML TO-CAN to be tested under the control of the test platform and measuring the height value of a TO cap of the EML TO-CAN to be tested; the spectrograph is used for carrying out optical coupling with the EML TO-CAN to be tested through a multimode optical fiber so as to measure spectral data of the EML TO-CAN to be tested; and the test platform is used for reading the spectral data through the spectrograph, reading the Z-axis height value at the same time, calculating the focal length through the Z-axis height value and the TO cap height value, and completing the spectral data and focal length performance test of the to-be-tested product.

Description

Technical Field

[0001] The present invention relates to the field of optical communications, and in particular to an ML TO-CAN component testing system and method. Background Art

[0002] With the rapid development of science and technology, lasers, as an important optical device, play an increasingly important role in the fields of communication, medical treatment, scientific research, etc. Among them, EML (electro-optically modulated laser) has shown great application potential and value in the field of science and technology with its high-speed modulation capability, high efficiency, low noise, long service life and good stability.

[0003] With the rapid development of EML TO-CAN, the market demand has increased rapidly, and the demand for its performance testing has also increased accordingly. However, due to the complexity of its product structure and test items, the test efficiency is low, and performance testing has become a bottleneck process in the production process of various manufacturing companies. Among them, the main spectral performance and focal length tests are important factors affecting the test efficiency: the power must be coupled to a certain size through single-mode or multi-mode optical fiber before the corresponding test is performed. The two couplings directly lead to low test efficiency. Summary of the invention

[0004] In view of the technical defects and technical drawbacks in the prior art, the embodiments of the present invention provide an EML TO-CAN component testing system and method that overcomes the above problems or at least partially solves the above problems. By combining the focal length test and the spectrum test into one, the two couplings of the focal length and spectrum test are converted into one coupling, which greatly improves the test efficiency. The specific scheme is as follows:

[0005] As a first aspect of the present invention, there is provided an EML TO-CAN component testing system, the system comprising: a testing board, a multimode optical fiber, a spectrometer, a height measuring probe and a testing platform, the EML TO-CAN of a product to be tested being plugged into the testing board;

[0006] The height measuring probe is used to move above the EML TO-CAN of the product to be tested under the control of the test platform to measure the height value of the TO cap of the EML TO-CAN of the product to be tested;

[0007] The spectrometer is used to perform optical coupling with the EML TO-CAN to be tested through a multimode optical fiber to measure the spectrum data of the EML TO-CAN to be tested;

[0008] The test platform is used to read the spectral data through a spectrometer and read the Z-axis height value at the same time, calculate the focal length through the Z-axis height value and the TO cap height value, and complete the spectral data and focal length performance test of the product to be tested.

[0009] Furthermore, the system also includes an integrating sphere, and the testing platform is also used to: first control the integrating sphere to move just above the EML TO-CAN of the product to be tested, test the LIV performance of the EML TO-CAN of the product to be tested by the integrating sphere, and after the LIV performance reaches a preset requirement, control the height measuring probe to move above the EML TO-CAN of the product to be tested to measure the height value of the TO cap of the EML TO-CAN of the product to be tested.

[0010] Furthermore, it is characterized in that the test board is also used to power the TEC of the EML TO-CAN to be tested under the control of the test platform, and the test platform is also used to monitor the temperature of the TEC, and the EML TO-CAN component test is performed only after the TEC temperature control is stable.

[0011] Furthermore, the test platform is also used to read the optical power through a spectrometer, and determine whether the maximum coupling degree is reached based on the comparison of the read optical power with the EMLTO-CAN output optical power. When the maximum coupling degree is reached, the spectral data and Z-axis height value at this time are read, and the focal length is calculated through the Z-axis height value and the TO cap height value.

[0012] Furthermore, the test platform is also used to adjust the position of the EML TO-CAN of the product to be tested in the xyz three-axis directions, so that the multi-mode optical fiber and the EML TO-CAN of the product to be tested achieve three-axis coupling.

[0013] As a second aspect of the present invention, a method for testing an EML TO-CAN component is provided, the method comprising:

[0014] Insert the EML TO-CAN of the product to be tested on the test board, control the height measuring probe to move above the EML TO-CAN of the product to be tested, and measure the height value of the TO cap of the EML TO-CAN of the product to be tested by the height measuring probe;

[0015] Control the EML TO-CAN of the product to be tested to emit laser, and read the corresponding spectrum data through the spectrometer, and obtain the Z-axis height value at the same time;

[0016] The focal length is calculated through the Z-axis height value and the TO cap height value, and the spectrum data and focal length performance test of the product to be tested are completed;

[0017] The spectrometer is used to perform optical coupling with the EML TO-CAN product to be tested through a multimode optical fiber to measure the spectrum data of the EML TO-CAN product to be tested.

[0018] Furthermore, the method also includes: first controlling the integrating sphere to move just above the EML TO-CAN of the product to be tested, testing the LIV performance of the EML TO-CAN of the product to be tested by using the integrating sphere, and after the LIV performance reaches a preset requirement, controlling the height measuring probe to move above the EML TO-CAN of the product to be tested to measure the height value of the TO cap of the EML TO-CAN of the product to be tested.

[0019] Furthermore, the temperature of the TEC of the EML TO-CAN is monitored, and the EML TO-CAN component test is performed only after the TEC temperature control is stable.

[0020] Furthermore, the method also includes: reading the optical power through a spectrometer, determining whether the maximum coupling degree is reached based on the comparison of the read optical power with the EMLTO-CAN output optical power, and when the maximum coupling degree is reached, reading the spectral data and Z-axis height value at this time, and calculating the focal length through the Z-axis height value and the TO cap height value.

[0021] Furthermore, the position of the EML TO-CAN of the product to be tested is adjusted in the xyz three-axis directions so that the multimode optical fiber and the EML TO-CAN of the product to be tested achieve three-axis coupling.

[0022] The present invention has the following beneficial effects:

[0023] Compared with the existing EML TO-CAN test method, the present invention combines the focal length test and the spectrum test into one, removes the single-mode optical fiber, and uses only one multi-mode optical fiber for one coupling, and tests the spectrum and focal length separately at the same time, thereby completing the test items while greatly reducing the test time, thereby greatly improving the test efficiency, and the production capacity is also improved simultaneously, achieving the purpose of reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of an EML TO-CAN component testing system framework provided by an embodiment of the present invention;

[0025] Figure 2 A schematic flow chart of an EML TO-CAN component testing method provided by an embodiment of the present invention;

[0026] In the figure: 1-test platform, 2-integrating sphere, 3-spectrometer, 4-optical fiber, 5-height measuring probe, 6-product to be tested, 7-test board. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, the system includes: a test board 7, a multimode optical fiber 4, a spectrometer 3, an integrating sphere 2, a height measuring probe 5 and a test platform 1, and the EML TO-CAN 6 of the product to be tested is plugged into the test board 7. Various test programs are pre-loaded in the test platform 1 to realize the control of the test board 7, the multimode optical fiber 4, the spectrometer 3, the integrating sphere 2 and the height measuring probe 5;

[0029] The integrating sphere 2 is used to move above the EML TO-CAN 6 to be tested under the control of the test platform 1, and the LIV performance of the EML TO-CAN 6 to be tested is tested by the integrating sphere 2, and the LIV performance includes the photoelectric parameters such as Po / Ith / Im / Vf of the EML TO-CAN;

[0030] The height measuring probe 5 is used to move above the EML TO-CAN 6 of the product to be tested under the control of the test platform 1 to measure the height value of the TO cap of the EML TO-CAN 6 of the product to be tested;

[0031] The spectrometer 3 is used to perform optical coupling with the test product EML TO-CAN6 through the multimode optical fiber 4 to measure the spectrum data of the test product EML TO-CAN6;

[0032] The test platform 1 is used to read the spectral data through the spectrometer 3 and read the Z-axis height value at the same time. The focal length is calculated through the Z-axis height value and the TO cap height value to complete the spectral data and focal length performance test of the product to be tested.

[0033] Among them, the TO cap is a material of the EML TO-CAN with a lens. The light from the EML TO-CAN is refracted through the lens of the TO cap. The height of the EML TO-CAN base is obtained by the height of the TO cap, and based on the Z-axis height value, the Z-axis height value is the height value of the light focal point. The movement of the Z-axis motor of the equipment itself will feedback the coordinate value in real time, which can be read directly. The focal length of the EML TO-CAN6 to be tested is obtained by subtracting the TO cap height value from the Z-axis height value.

[0034] The present invention combines the focal length test and the spectrum test into one, removes the single-mode optical fiber, and uses only one multi-mode optical fiber 4 for one coupling, and tests the spectrum and focal length respectively at the same time, so as to complete the test items while greatly reducing the test time, thereby greatly improving the test efficiency, and the production capacity is also improved synchronously, achieving the purpose of reducing costs and increasing efficiency.

[0035] In some embodiments, the test board 7 is also used to power the TEC of the EML TO-CAN 6 under the control of the test platform 1. The test platform 1 is also used to monitor the temperature of the TEC. After the TEC temperature control is stable, the EML TO-CAN component test is performed.

[0036] In some embodiments, the test platform 1 is also used to read the optical power through the spectrometer 3, and determine whether the maximum coupling degree is reached based on the comparison of the read optical power with the EML TO-CAN output optical power, and when the maximum coupling degree is reached, read the spectral data and Z-axis height value at this time, and calculate the focal length through the Z-axis height value and the TO cap height value.

[0037] Among them, the EML TO-CAN output optical power is a known parameter, which is the rated optical power stably output by the EML TO-CAN. When the read optical power reaches a certain matching degree with the EML TO-CAN output optical power, it is judged that the multimode optical fiber 4 and the EML TO-CAN 6 to be tested have reached the maximum coupling degree.

[0038] In some embodiments, the test platform 1 is further used to adjust the position of the EML TO-CAN 6 of the test product in the xyz three-axis direction, so that the multi-mode optical fiber 4 and the EML TO-CAN 6 of the test product can achieve three-axis coupling.

[0039] The position of the EML TO-CAN 6 of the test object can be adjusted by using the existing xyz three-axis coupling device, so that the multimode optical fiber 4 and the EML TO-CAN 6 of the test object can achieve three-axis coupling.

[0040] like Figure 2 As shown, an embodiment of the present invention further provides an EML TO-CAN component testing method, the method comprising:

[0041] Insert the EML TO-CAN6 of the product to be tested on the test board 7, control the height measuring probe 5 to move to the top of the EML TO-CAN6 of the product to be tested, and measure the height value of the TO cap of the EML TO-CAN6 of the product to be tested by the height measuring probe 5;

[0042] Control the EML TO-CAN6 of the product to be tested to emit laser, and measure and read the corresponding spectrum data through the spectrometer 3, and obtain the Z-axis height value at the same time;

[0043] The focal length is calculated through the Z-axis height value and the TO cap height value, and the spectrum data and focal length performance test of the product to be tested are completed;

[0044] The spectrometer 3 is used to optically couple with the EML TO-CAN6 to be tested through the multimode optical fiber 4 to measure the spectrum data of the EML TO-CAN6 to be tested.

[0045] The present invention is further described below by a complete embodiment. The test process of the present invention includes:

[0046] 1. First, insert the EML TO-CAN6 of the product to be tested into the test board 7 in batches, and then insert the test board 7 into the test machine connection board slot to complete the circuit conduction between the product to be tested and the test bench, and then power the EML TO-CAN through the test board 7, and first power the TEC to a fixed temperature;

[0047] 2. After the TEC temperature control is stable, the test platform 1 controls the moving integrating sphere 2 to be directly above the product to be tested to test the LIV performance of the product;

[0048] 3. After the LIV performance test is completed, the test platform 1 controls the mobile height measuring probe 5 to the top of the product to be tested to measure the height value of the TO cap to calibrate the initial value of the TO cap height;

[0049] 4. After completing the TO cap height test, the test platform 1 controls the multimode optical fiber 4 to move to the top of the DUT for optical coupling with the DUT, and inputs a fixed current to the DUT to control the DUT to work and emit laser. The position of the DUT is adjusted through the XYZ three-axis, and the coupling is confirmed to be maximum by reading the power value of Peak1 in the spectrometer 3. Then, the spectrum data is read through the spectrometer 3, and the Z-axis height value is read at the same time to calculate the focal length, completing the test of one DUT.

[0050] 5. Repeat the above steps to test all the products to be tested on the test board 7 in turn.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An EML TO-CAN component testing system, characterized in that: The system comprises: a test board, a multimode optical fiber, a spectrometer, a height measuring probe and a test platform, and the EML TO-CAN of the product to be tested is plugged into the test board; The height measuring probe is used to move above the EML TO-CAN of the product to be tested under the control of the test platform to measure the height value of the TO cap of the EML TO-CAN of the product to be tested; The spectrometer is used to perform optical coupling with the EML TO-CAN to be tested through a multimode optical fiber to measure the spectrum data of the EML TO-CAN to be tested; The test platform is used to read the spectral data through a spectrometer and read the Z-axis height value at the same time, calculate the focal length through the Z-axis height value and the TO cap height value, and complete the spectral data and focal length performance test of the product to be tested.

2. The EML TO-CAN component testing system according to claim 1, characterized in that: The system also includes an integrating sphere, and the testing platform is further used to: first control the integrating sphere to move just above the EML TO-CAN of the product to be tested, test the LIV performance of the EML TO-CAN of the product to be tested by the integrating sphere, and after the LIV performance reaches a preset requirement, control the height measuring probe to move above the EML TO-CAN of the product to be tested to measure the height value of the TO cap of the EML TO-CAN of the product to be tested.

3. The EML TO-CAN component testing system according to claim 1, characterized in that: The test board is also used to supply power to the TEC of the EML TO-CAN under the control of the test platform. The test platform is also used to monitor the temperature of the TEC. The EML TO-CAN component test is performed only after the TEC temperature control is stable.

4. The EML TO-CAN component testing system according to claim 1, characterized in that: The test platform is also used to read the optical power through a spectrometer, and determine whether the maximum coupling degree is reached based on the comparison of the read optical power with the EML TO-CAN output optical power. When the maximum coupling degree is reached, the spectrum data and Z-axis height value at this time are read, and the focal length is calculated through the Z-axis height value and the TO cap height value.

5. The EML TO-CAN component testing system according to claim 1, characterized in that: The test platform is also used to adjust the position of the EML TO-CAN of the product to be tested in the xyz three-axis direction, so that the multi-mode optical fiber and the EML TO-CAN of the product to be tested can achieve three-axis coupling.

6. An EML TO-CAN component testing method, characterized in that: The method comprises: Insert the EML TO-CAN of the product to be tested on the test board, control the height measuring probe to move above the EML TO-CAN of the product to be tested, and measure the height value of the TO cap of the EML TO-CAN of the product to be tested by the height measuring probe; Control the EML TO-CAN of the product to be tested to emit laser, and read the corresponding spectrum data through the spectrometer, and obtain the Z-axis height value at the same time; The focal length is calculated through the Z-axis height value and the TO cap height value, and the spectrum data and focal length performance test of the product to be tested are completed; The spectrometer is used to perform optical coupling with the EML TO-CAN product to be tested through a multimode optical fiber to measure the spectrum data of the EML TO-CAN product to be tested.

7. The EML TO-CAN component testing method according to claim 6, characterized in that: The method further includes: first controlling the integrating sphere to move directly above the EML TO-CAN of the product to be tested, testing the LIV performance of the EML TO-CAN of the product to be tested by using the integrating sphere, and after the LIV performance reaches a preset requirement, controlling the height measuring probe to move above the EML TO-CAN of the product to be tested to measure the height value of the TO cap of the EML TO-CAN of the product to be tested.

8. The EML TO-CAN component testing method according to claim 6, characterized in that: Monitor the temperature of the TEC of the EML TO-CAN, and only test the EML TO-CAN components after the TEC temperature control is stable.

9. The EML TO-CAN component testing method according to claim 6, characterized in that: The method also includes: reading the optical power through a spectrometer, comparing the read optical power with the EML TO-CAN output optical power, determining whether the maximum coupling degree is reached, and when the maximum coupling degree is reached, reading the spectrum data and the Z-axis height value at this time, and calculating the focal length through the Z-axis height value and the TO cap height value.

10. The EML TO-CAN component testing method according to claim 6, characterized in that: The position of the EML TO-CAN of the DUT is adjusted in the xyz triaxial directions to achieve triaxial coupling between the multimode optical fiber and the EML TO-CAN of the DUT.

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