VCSEL optical power test equipment

Abstract

The utility model provides a VCSEL optical power test device, which comprises a shell, an automatic drawer device, an integrating sphere test device and a programmable power supply are sequentially arranged in the shell from bottom to top, the automatic drawer device comprises a module clamp assembly, the module clamp assembly clamps a VCSEL module, and the programmable power supply is connected with the VCSEL module. The integrating sphere testing device comprises an integrating sphere and a spectrograph, the integrating sphere is arranged right above the VCSEL module, the spectrograph is arranged on one side of the module clamp assembly, a laser emitting part of the VCSEL module is matched with a laser receiving hole in the bottom end of the integrating sphere, and a laser receiving hole is formed in the bottom end of the integrating sphere. The programmable power supply is in electric signal connection with the module clamp assembly and used for providing analog pulse width modulation signals for the VCSEL module, and the integrating sphere is in electric signal connection with the spectrograph and used for analyzing collected laser data. The utility model relates to the technical field of VCSEL module optical power testing.

Description

Technical Field

[0001] The utility model relates to the technical field of VCSEL module optical power testing, in particular to a VCSEL optical power testing device. Background Art

[0002] When traditional laser optical power testing equipment conducts quality testing on laser products, since conventional optical power meters can often only effectively collect the central part of the laser beam, for lasers with a large emission angle, the scattered light at the edge cannot be fully captured. This results in the test results only reflecting part of the true situation of the laser power, ignoring the full power characteristics of the wide-angle beam, thus affecting the accuracy and comprehensiveness of the test. Moreover, due to the wide distribution of the laser beam in the actual working state of the laser, existing testing methods can often only measure the power in the axial region of the laser beam, ignoring the optical power at a large angle away from the center, causing a significant deviation between the test results and the actual output power, which is not conducive to the strict control of product quality and performance evaluation.

[0003] For lasers without a built-in drive circuit, an external constant current source is usually used for test power supply. However, general external power supply devices on the market often have difficulty providing sufficiently accurate and stable current drive. Especially in test scenarios that require high-precision current control, this inaccurate drive method will directly affect the working efficiency of the laser and the stability of the output power, further affecting the accuracy of the optical power test.

[0004] To sum up, the main problems existing in the prior art in VCSEL optical power testing include but are not limited to: insufficient collection of large emission angle beams, incomplete optical power data during finished product testing, and limited test accuracy due to lack of high-precision current drive support. These problems seriously hinder the accurate evaluation and optimization of laser performance, and there is an urgent need for a new testing device to overcome these technical obstacles and achieve more comprehensive and accurate VCSEL optical power testing. Summary of the Utility Model

[0005] Aiming at the defects of the above-mentioned prior art, the utility model provides a VCSEL optical power testing device, aiming to solve the problems that the existing VCSEL optical power testing device cannot accurately collect large emission angle beams, the optical power of finished product testing is not comprehensive, and there is a lack of high-precision current drive control.

[0006] To achieve the above object, the technical solution adopted by the present utility model is: a VCSEL optical power test device, including a housing, in which an automatic drawer device, an integrating sphere test device and a programmable power supply are sequentially arranged from bottom to top. The automatic drawer device includes a module fixture assembly, and the module fixture assembly holds a VCSEL module. The integrating sphere test device includes an integrating sphere and a spectrometer. The integrating sphere is arranged directly above the VCSEL module, and the spectrometer is arranged on one side of the module fixture assembly. The laser emitting part of the VCSEL module is adapted to the laser receiving hole at the bottom of the integrating sphere. The programmable power supply is electrically connected to the module fixture assembly to provide an analog pulse width modulation signal to the VCSEL module. The integrating sphere is electrically connected to the spectrometer to analyze the collected laser data.

[0007] Based on the above, the beneficial effects of a VCSEL optical power test device are to solve the problems in the prior art that the VCSEL optical power test device cannot accurately collect large emission angle beams, the finished product test optical power is not comprehensive, and there is a lack of high-precision current drive control; mainly reflected in:

[0008] 1. The present utility model realizes the effective collection of large emission angle beams through the precise positioning and alignment of the laser receiving hole of the integrating sphere in the integrating sphere test device and the laser emitting part of the VCSEL module, ensuring the full-range coverage of the laser power during the test, and improving the comprehensiveness and accuracy of the test results;

[0009] 2. The present utility model provides an analog pulse width modulation signal through the programmable power supply to directly drive the VCSEL module for testing. Compared with the traditional constant current source, the precision and stability of current control are greatly improved, enabling the laser to be tested under the most optimized working conditions and ensuring that the test data truly reflects the performance of the laser;

[0010] 3. The present utility model realizes the automatic feeding and discharging during the test process through the cooperation of the automatic drawer device and the feeding and discharging displacement assembly, not only improving the test efficiency, but also reducing the errors caused by manual operation, making the test process smoother and more efficient.

[0011] Further, the module fixture assembly is provided with a drawer, a module mounting table, a signal transfer piece and a module pressing cover. The module mounting table is arranged at the upper end of the drawer. The module pressing cover is hinged to the module mounting table. The module mounting table is sequentially provided with a module mounting part and a signal transfer part from front to back. The VCSEL module is embedded in the module mounting part. A plurality of signal access pins are arranged on the signal transfer part. The two ends of the signal transfer piece are respectively inserted into the pin part of the VCSEL module and the signal access pins.

[0012] Based on the above, the beneficial effects of the drawer are to achieve rapid replacement of the VCSEL module for testing, improving the testing efficiency and flexibility; the beneficial effects of the module installation platform are to provide a stable installation platform for the VCSEL module, ensuring accurate positioning of the laser during testing; the beneficial effects of the signal transfer piece are to seamlessly bridge the signals between the VCSEL module and the testing system, ensuring reliable and efficient data transmission; the beneficial effects of the module gland are to position and clamp the VCSEL module, enhancing the stability of the testing; the beneficial effects of the module installation part are to provide an embedded installation area designed specifically for the VCSEL module, simplifying the installation steps and improving the adaptability; the beneficial effects of the signal transfer part are to integrate multi-pin interfaces for connecting each pin on the pin part of the VCSEL module, thereby testing whether there are any problems with the quality of each pin.

[0013] Further, the automatic drawer device further includes a feeding and discharging displacement component. The module fixture component is slidably connected to the feeding and discharging displacement component. The feeding and discharging displacement component is composed of a sliding rod component, a connecting block, and a motor-driven crawler component. The sliding rod component is disposed at the bottom end of the housing. The connecting block is sleeved on the sliding rod component, and the top end of the connecting block is connected to the drawer. The motor-driven crawler component is connected to the drawer, enabling it to slide along the sliding rod component through the connecting block.

[0014] Based on the above, the beneficial effects of the sliding rod component are to support the smooth movement of the drawer and ensure the stability of the displacement; the beneficial effects of the connecting block are to achieve directional displacement between the drawer and the sliding rod component; the beneficial effects of the motor-driven crawler component are to achieve high-efficiency driving of the module fixture component for feeding and discharging.

[0015] Further, the integrating sphere testing device further includes a biaxial adjustment component. The biaxial adjustment component includes a horizontal axis fine-tuning component, a vertical axis fine-tuning component, and a support frame for accurately positioning the integrating sphere. The vertical axis fine-tuning component is disposed at the upper end of the support frame. The horizontal axis fine-tuning component is disposed at the upper end of the vertical axis fine-tuning component. Both the horizontal axis fine-tuning component and the vertical axis fine-tuning component are composed of a fine-tuning bolt module, a fine-tuning slide rail, and a fine-tuning slider, and the directions of the two components are set at 90° to each other. The fine-tuning bolt module is provided with an internal thread block, a small motor, and a pushing block. The internal thread block is disposed on one side of the fine-tuning slide rail. The pushing block is disposed on one side of the fine-tuning slider. The output end of the small motor is threadedly connected to the internal thread block and extends to be connected to the pushing block. When the small motor is started, the fine-tuning slider slides along the fine-tuning slide rail to achieve fine-tuning of the integrating sphere in the horizontal or vertical direction. The integrating sphere is disposed on the fine-tuning slider of the horizontal axis fine-tuning component.

[0016] Based on the above, the beneficial effects of the horizontal fine-tuning component are to achieve fine-tuning positioning in the horizontal direction of the integrating sphere, ensure precise alignment of the laser, and improve the test accuracy; the beneficial effects of the vertical fine-tuning component are to achieve fine-tuning positioning in the vertical direction of the integrating sphere, ensure precise alignment of the laser, and improve the test accuracy; the beneficial effects of the support frame are to provide a stable support for the biaxial adjustment component, ensuring stability and precision during the adjustment process; the beneficial effects of the fine-tuning bolt module are the core components to achieve the fine-tuning function, controlling the displacement through precise rotation; the beneficial effects of the fine-tuning slide rail are to provide a smooth guide for the fine-tuning slider, ensuring linearity and stability during the adjustment process; the beneficial effects of the fine-tuning slider are to slide along the slide rail to achieve fine-tuning of the position; the beneficial effects of the internal thread block are to cooperate with the small motor to convert rotational motion into linear motion; the beneficial effects of the small motor are to precisely control the displacement of the pushing block; the beneficial effects of the pushing block are to transmit the rotational force of the small motor, push the slider to slide along the track, and complete the fine-tuning action.

[0017] Further, an electronic control module is also provided inside the housing. The electronic control module is arranged above the programmable power supply. The module fixture assembly, the feeding and discharging displacement assembly, the integrating sphere, and the spectrometer are all electrically connected to the electronic control module.

[0018] Based on the above, the beneficial effects of the programmable power supply are to provide an analog pulse width modulation signal for the VCSEL module, improving the flexibility and accuracy of the test; the beneficial effects of the electronic control module are to integrate the control logic of the test system, achieve coordinated work among various components, and optimize the test process and data processing.

[0019] Further, a temperature control module is arranged on one side of the integrating sphere for adjusting the internal temperature of the integrating sphere. The temperature control module is electrically connected to the electronic control module.

[0020] Based on the above, the beneficial effects of the temperature control module are to automatically adjust the temperature of the integrating sphere, maintain a constant test environment, and reduce test errors caused by temperature.

[0021] Further, the housing is composed of a test housing part and an electronic control module housing part. The electronic control module housing part is arranged at the upper end of the test housing part. The automatic drawer device, the integrating sphere test device, and the programmable power supply are all arranged inside the test housing part. The electronic control module is arranged inside the electronic control module housing part. Heat dissipation grids are arranged on both sides of the test housing part and the electronic control module housing part.

[0022] To more clearly elaborate the above features of the present invention and the purposes to be achieved, the following further describes the present invention in combination with the accompanying drawings and specific embodiments. Description of the Drawings

[0023] Figure 1: is the three-dimensional schematic diagram of the present utility model;

[0024] Figure 2 : is the schematic diagram of the internal structure of the test housing part of the present utility model;

[0025] Figure 3 : is the schematic diagram of the internal structure of the present utility model;

[0026] Figure 4 : is the schematic diagram of the automatic drawer device of the present utility model;

[0027] Figure 5 : is the schematic diagram of the cooperation between the module installation table and the module pressing cover of the present utility model;

[0028] Figure 6 : is the schematic diagram of the module installation table of the present utility model;

[0029] Figure 7 : is the schematic diagram of the module installation part and the signal transfer part of the present utility model;

[0030] Figure 8 : is the schematic diagram of the feeding and discharging displacement assembly of the present utility model;

[0031] Figure 9 : is the schematic diagram of the integrating sphere test device of the present utility model.

[0032] Explanation of the reference numerals in the drawings: 1 - housing, 11 - test housing part, 12 - electronic control module housing part, 13 - heat dissipation grid, 2 - automatic drawer device, 21 - module fixture assembly, 211 - drawer, 212 - module installation table, 2121 - module installation part, 2122 - signal transfer part, 21221 - signal access pin, 213 - signal transfer piece, 214 - module pressing cover, 22 - feeding and discharging displacement assembly, 221 - sliding rod component, 222 - connecting block, 223 - motor-driven track component, 3 - integrating sphere test device, 31 - integrating sphere, 311 - laser receiving hole, 32 - biaxial adjustment assembly, 321 - horizontal axis fine adjustment component, 322 - vertical axis fine adjustment component, 323 - support frame, 324 - fine adjustment bolt module, 3241 - internal thread block, 3242 - small motor, 3243 - pushing block, 325 - fine adjustment slide rail, 326 - fine adjustment slider, 33 - spectrometer, 4 - control device, 41 - programmable power supply, 42 - electronic control module, 10 - VCSEL module, 101 - laser emission part, 102 - pin part. Detailed implementation manners

[0033] As Figures 1-9As shown in the figure, a VCSEL optical power test device includes a housing 1. Inside the housing 1, an automatic drawer device 2, an integrating sphere test device 3, and a programmable power supply 4 are sequentially arranged from bottom to top. The automatic drawer device 2 includes a module fixture assembly 21. The module fixture assembly 21 holds a VCSEL module 10. The integrating sphere test device 3 includes an integrating sphere 31 and a spectrometer 33. The integrating sphere 31 is arranged directly above the VCSEL module 10. The spectrometer 33 is arranged on one side of the module fixture assembly 21. The laser emitting part 101 of the VCSEL module 10 is adapted to the laser receiving hole 311 at the bottom of the integrating sphere 31. The programmable power supply 4 is electrically connected to the module fixture assembly 21 to provide an analog pulse width modulation signal to the VCSEL module 10. The integrating sphere 31 is electrically connected to the spectrometer 33 to analyze the collected laser data.

[0034] The module fixture assembly 21 is provided with a drawer 211, a module mounting table 212, a signal adapter 213, and a module cover 214. The module mounting table 212 is arranged at the upper end of the drawer 211. The module cover 214 is hinged to the module mounting table 212. On the module mounting table 212, a module mounting part 2121 and a signal adapter part 2122 are sequentially arranged from front to back. The VCSEL module 10 is embedded and installed in the module mounting part 2121. A plurality of signal access pins 21221 are arranged on the signal adapter part 2122. Two ends of the signal adapter 213 are respectively inserted into the pin part 102 of the VCSEL module 10 and the signal access pins 21221.

[0035] The automatic drawer device 2 further includes a feeding and discharging displacement assembly 22. The module fixture assembly 21 is slidably connected to the feeding and discharging displacement assembly 22. The feeding and discharging displacement assembly 22 is composed of a sliding rod component 221, a connecting block 222, and a motor-driven track component 223. The sliding rod component 221 is arranged at the bottom end of the housing 1. The connecting block 222 is sleeved on the sliding rod component 221, and the top end of the connecting block 222 is connected to the drawer 211. The motor-driven track component 223 is connected to the drawer 211 to enable it to slide and displace along the sliding rod component 221 through the connecting block 222.

[0036] The integrating sphere testing device 3 further includes a biaxial adjustment component 32. The biaxial adjustment component 32 includes a horizontal axis fine adjustment component 321, a vertical axis fine adjustment component 322, and a support frame 323, and is used to accurately position the integrating sphere 31. The vertical axis fine adjustment component 322 is arranged at the upper end of the support frame 323, and the horizontal axis fine adjustment component 321 is arranged at the upper end of the vertical axis fine adjustment component 322. Both the horizontal axis fine adjustment component 321 and the vertical axis fine adjustment component 322 are composed of a fine adjustment bolt module 324, a fine adjustment slide rail 325, and a fine adjustment slider 326, and the directions of the two components are set at 90° to each other. The fine adjustment bolt module 324 is provided with an internal thread block 3241, a small motor 3242, and a pushing block 3243. The internal thread block 3241 is arranged on one side of the fine adjustment slide rail 325, the pushing block 3243 is arranged on one side of the fine adjustment slider 326, the output end of the small motor 3242 is threadedly connected to the internal thread block 3241 and extends to be connected to the pushing block 3243. When the small motor 3242 is started, the fine adjustment slider 326 slides along the fine adjustment slide rail 325 to achieve fine adjustment of the integrating sphere 31 in the horizontal or vertical direction. The integrating sphere 31 is arranged on the fine adjustment slider 326 of the horizontal axis fine adjustment component 321.

[0037] An electronic control module 5 is further arranged in the housing 1. The electronic control module 5 is arranged above the programmable power supply 4. The module fixture assembly 21, the feeding and discharging displacement assembly 22, the integrating sphere 31, and the spectrometer 33 are all electrically connected to the electronic control module 5 in an electrical signal manner.

[0038] A temperature control module is arranged on one side of the integrating sphere 31 for adjusting the internal temperature of the integrating sphere. The temperature control module is electrically connected to the electronic control module 5 in an electrical signal manner.

[0039] The housing 1 is composed of a test housing part 11 and an electronic control module housing part 12. The electronic control module housing part 12 is arranged at the upper end of the test housing part 11. The automatic drawer device 2, the integrating sphere testing device 3, and the programmable power supply 4 are all arranged in the test housing part 11, and the electronic control module 5 is arranged in the electronic control module housing part 12. Heat dissipation grids 13 are arranged on both sides of the test housing part 11 and the electronic control module housing part 12.

[0040] In summary, the specific implementation of the present utility model is as follows: First, the operator opens the drawer 211, gently places the VCSEL module 10 to be tested in the preset slot of the module installation part 2121, ensuring that the module fits perfectly with the slot without tilt or wobble. Subsequently, align the pins of the VCSEL module 10 with the signal transfer part 2122 on the module installation table 212, and use the signal transfer piece 213 to connect between the pin part 102 of the VCSEL module 10 and the signal access pin 21221. After confirming the firm connection, close the module cover 214 and lock it to ensure safety and stability;

[0041] After the operator inputs or selects the parameters required for this test in the computer and clicks the "Start Test" button, the system enters the automatic mode. After receiving the instruction, the motor drives the crawler component 223 to drive the entire module fixture assembly 21 to smoothly slide along the sliding rod component 221 towards the test position;

[0042] After reaching the test position, if fine adjustment is required, the control device 4 adjusts the vertical axis fine adjustment component 322 or the horizontal axis fine adjustment component 321 as needed, and uses the small motor 3362 to finely adjust the position of the sliding part 335 until the laser receiving hole 311 of the integrating sphere 31 is perfectly aligned with the laser emitting part 101 of the VCSEL module. At this time, the programmable power supply 41 simulates a pulse width modulation signal to drive the VCSEL module 10 to more accurately reflect the performance of the VCSEL module 10 in the actual working scenario. At this time, the integrating sphere 41 starts to collect optical data;

[0043] After being evenly reflected by the integrating sphere 31, the optical signal received by the spectrometer 33 is spectrally analyzed, and the data is immediately transmitted to the electronic control module 42 for preliminary processing, including optical power calculation, wavelength correction, etc.;

[0044] The electronic control module 42 sends the processed data to an external computer via an electrical signal for engineers to evaluate the performance of the VCSEL module.

[0045] The above is only the optimal solution embodiment of the present utility model and is not used to limit the present utility model. Various modifications or substitutions made by those skilled in the art to the present utility model without departing from the essence and protection scope of the present utility model should also be within the protection scope of the present utility model.

Claims

1. A VCSEL optical power test device, comprising a housing (1), characterized in that: The housing (1) is provided with an automatic drawer device (2), an integrating sphere test device (3) and a programmable power supply (4) in order from bottom to top. The automatic drawer device (2) comprises a module clamp assembly (21), wherein the module clamp assembly (21) clamps a VCSEL module (10). The integrating sphere test device (3) comprises an integrating sphere (31) and a spectrometer (33). The integrating sphere (31) is arranged directly above the VCSEL module (10). The spectrometer (33) ) is arranged on one side of the module fixture assembly (21), the laser emitting portion (101) of the VCSEL module (10) is matched with the laser receiving hole (311) at the bottom end of the integrating sphere (31), the programmable power supply (4) is electrically connected to the module fixture assembly (21) to provide an analog pulse width modulation signal to the VCSEL module (10), and the integrating sphere (31) is electrically connected to the spectrometer (33) to analyze the collected laser data.

2. A VCSEL optical power test device according to claim 1, characterized in that: The module fixture assembly (21) is provided with a drawer (211), a module mounting platform (212), a signal adapter plate (213) and a module pressure cover (214); the module mounting platform (212) is arranged at the upper end of the drawer (211); the module pressure cover (214) is hinged on the module mounting platform (212); a module mounting portion (2121) and a signal adapter portion (2122) are arranged on the module mounting platform (212) in sequence from front to back; the VCSEL module (10) is embedded and installed in the module mounting portion (2121); a plurality of signal access pins (21221) are arranged on the signal adapter portion (2122); and two ends of the signal adapter plate (213) are respectively plugged into the pin portion (102) of the VCSEL module (10) and the signal access pins (21221).

3. A VCSEL optical power test device according to claim 2, characterized in that: The automatic drawer device (2) also includes an in-and-out material displacement component (22), the module clamp component (21) is slidably connected to the in-and-out material displacement component (22), and the in-and-out material displacement component (22) is composed of a sliding rod component (221), a connecting block (222) and a motor-driven track component (223), the sliding rod component (221) is arranged at the bottom end of the shell (1), the connecting block (222) is sleeved on the sliding rod component (221), and the top end of the connecting block (222) is connected to the drawer (211), and the motor-driven track component (223) is connected to the drawer (211) so that it can slide and displace along the sliding rod component (221) through the connecting block (222).

4. A VCSEL optical power test device according to claim 1, characterized in that: The integrating sphere testing device (3) further comprises a dual-axis adjustment assembly (32), wherein the dual-axis adjustment assembly (32) comprises a transverse axis fine-tuning component (321), a longitudinal axis fine-tuning component (322) and a support frame (323), and is used for accurately positioning the integrating sphere (31), wherein the longitudinal axis fine-tuning component (322) is arranged at the upper end of the support frame (323), and the transverse axis fine-tuning component (321) is arranged at the upper end of the longitudinal axis fine-tuning component (322), wherein the transverse axis fine-tuning component (321) and the longitudinal axis fine-tuning component (322) are both composed of a fine-tuning bolt module (324), a fine-tuning slide rail (325) and a fine-tuning slide member (326), and the directions of the two components are arranged at 90 degrees to each other, and the fine-tuning bolt module (324) is provided with an internal thread block (3241), a small motor (3242) and a pushing block (3243), the internal thread block (3241) is arranged on one side of the fine-tuning slide rail (325), the pushing block (3243) is arranged on one side of the fine-tuning slide (326), the output end of the small motor (3242) is threadedly connected to the internal thread block (3241), and is extended to be connected to the pushing block (3243), the small motor (3242) is started, and the fine-tuning slide (326) slides along the fine-tuning slide rail (325) to achieve fine-tuning of the integrating sphere (31) in the horizontal or vertical direction, and the integrating sphere (31) is arranged on the fine-tuning slide (326) of the transverse axis fine-tuning component (321).

5. A VCSEL optical power test device according to claim 3, characterized in that: An electric control module (5) is also arranged in the housing (1), and the electric control module (5) is arranged above the programmable power supply (4). The module clamp assembly (21), the material inlet and outlet displacement assembly (22), the integrating sphere (31), and the spectrometer (33) are all connected to the electric control module (5) via electrical signals.

6. A VCSEL optical power test device according to claim 5, characterized in that: A temperature control module is provided on one side of the integrating sphere (31) for adjusting the internal temperature of the integrating sphere, and the temperature control module is connected to the electric control module (5) via an electrical signal.

7. A VCSEL optical power test device according to claim 6, characterized in that: The housing (1) is composed of a test housing portion (11) and an electric control module housing portion (12); the electric control module housing portion (12) is arranged at the upper end of the test housing portion (11); the automatic drawer device (2), the integrating sphere test device (3) and the programmable power supply (4) are all arranged in the test housing portion (11); the electric control module (5) is arranged in the electric control module housing portion (12); and heat dissipation grids (13) are arranged on both sides of the test housing portion (11) and the electric control module housing portion (12).

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