MCC laser single-bar test device and test method

Abstract

The present invention relates to an MCC laser single-bar test device and method, belonging to the field of semiconductor laser technology. The device includes a fixed plate, a fixed frame I, a fixed frame II, a motion mechanism, and a positioning mechanism. Fixed frame I is provided on the fixed plate, a positioning mechanism is provided on fixed frame I, an MCC laser is provided on the positioning mechanism, a motion mechanism is provided above the positioning mechanism, and the motion mechanism is connected to the fixed plate via fixed frame II. The motion mechanism is pressed downward to fix the MCC laser to the positioning mechanism, and coolant is introduced into the positioning mechanism to cool the MCC laser. The present invention has a simple structure, convenient operation, high production efficiency, and can achieve automatic positioning and fixation of the MCC laser, ensuring the accuracy of MCC laser testing.

Description

Technical Field

[0001] The invention relates to an MCC laser single-bar testing device and a testing method, belonging to the technical field of semiconductor lasers. Background Art

[0002] Due to the advantages of semiconductor lasers such as small size, light weight, high electro-optical conversion efficiency, long life and high reliability, they have gradually replaced the use of gas and solid lasers in fields such as communications, medical treatment, display, industrial production and security, and their application scope is also gradually expanding.

[0003] MCC microchannel semiconductor lasers (hereinafter referred to as MCC lasers) have built-in cooling liquid channels, which enable them to have higher heat dissipation efficiency. Semiconductor lasers packaged using microchannels can operate in CW (continuous wave) and high-duty-cycle QCW (quadrant continuous wave) modes. Reliability verification is required for packaged MCC microchannel semiconductor lasers. Generally, a certain number of MCC lasers are stacked together for aging screening. After aging, a single MCC laser is subjected to single-bar testing. This involves observing changes in parameters such as laser power and wavelength under certain voltage and current conditions to eliminate defective devices.

[0004] MCC lasers generally have high power and generate a lot of heat during testing. Therefore, it is necessary to set up a microchannel inside the laser to pass a certain amount of coolant through the laser to dissipate the heat of the MCC laser in a timely manner. During the test process, it is necessary to ensure that the MCC laser has good sealing performance and accurate fixed position. The MCC laser through hole must correspond to the position of the test fixture through hole. Any misalignment will cause a loose seal, resulting in coolant leakage, causing contamination and damage to the MCC laser.

[0005] Currently, the test device commonly used for MCC lasers is a base with two fluid holes in the middle. Two sealing rings are placed on the base fluid holes. The MCC laser is manually placed on the sealing rings. The position of the MCC laser and the base fluid holes is manually adjusted by visual observation. Then the electrodes are placed. The electrodes, MCC laser, base and other structures are fixed together using multiple bolts. The test is then carried out. After the test is completed, the bolts are loosened and removed, and the MCC laser is removed from the test fixture. This test fixture has a simple structure, and it is difficult to ensure the consistent fixing position of the MCC laser. At the same time, manually tightening the screws to fix it causes the MCC laser to be subjected to different forces, which can easily cause laser leakage and poor contact, resulting in large errors in the test data. In addition, each test of an MCC laser requires multiple disassembly and assembly of the screws, which greatly increases the workload and working time. The test efficiency is relatively low. The manual operation process is also prone to human factors causing product contamination, making it unsuitable for mass production requirements. Other existing testing devices, such as a test fixture disclosed in Chinese patent CN106996990A for simultaneously testing multiple multi-pin laser devices, are obviously not suitable for testing MCC lasers.

[0006] In view of this, it is very necessary to design a testing device with simple structure, convenient operation, high production efficiency, and the ability to achieve automatic positioning and fixation of the MCC laser. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides an MCC laser single-bar testing device with a simple structure, easy operation, high production efficiency, and the ability to automatically position and fix the MCC laser, thereby ensuring the testing accuracy of the MCC laser.

[0008] The present invention also provides a testing method for the MCC laser single-bar testing device.

[0009] Explanation of terms:

[0010] MCC (micro channel cooler): A copper heat sink with tiny internal water channels for strong heat dissipation.

[0011] The technical solutions of the present invention are as follows:

[0012] An MCC laser single-bar test device includes a fixing plate, a fixing frame I, a fixing frame II, a motion mechanism and a positioning mechanism, wherein:

[0013] A fixing frame I is provided on the fixing plate, a positioning mechanism is provided on the fixing frame I, an MCC laser is provided on the positioning mechanism, a moving mechanism is provided above the positioning mechanism, the moving mechanism is connected to the fixing plate through the fixing frame II, the MCC laser is fixed to the positioning mechanism by pressing down the moving mechanism, and a coolant is introduced into the positioning mechanism to cool the MCC laser.

[0014] Preferably, the positioning mechanism includes a base, a negative electrode and a positioning plate. The base is arranged on the fixing frame I, the negative electrode is arranged on the base through the negative electrode insulating plate, the positioning plate is arranged on the negative electrode, and a positioning groove is arranged in the middle position of one side of the positioning plate. The positioning groove has the same length and width as the MCC laser, which is convenient for accurately positioning the position of the MCC laser. The MCC laser is arranged in the positioning groove, and the MCC laser is clamped and positioned by the positioning groove.

[0015] Further preferably, two liquid holes are provided in the positioning mechanism, and the liquid holes sequentially pass through the negative electrode, the negative electrode insulating sheet and the base below the positioning groove. The positions of the two liquid holes correspond to the liquid inlet and liquid outlet positions of the MCC laser in the positioning groove respectively. A groove is provided on the negative electrode liquid hole, and the sealing treatment of the negative electrode and the MCC laser is achieved by arranging a sealing ring in the groove.

[0016] Preferably, chamfers are provided on both sides of the upper end of the positioning groove to facilitate the removal and placement of the MCC laser, and a notch is provided at the front end of the positioning groove to avoid touching the light-emitting area at the front end of the MCC laser when removing and placing the MCC laser.

[0017] Preferably, the cross-sections of the base, the negative electrode insulating sheet, the negative electrode and the positioning sheet are all rectangular, which is convenient for installation.

[0018] Preferably, the motion mechanism includes a cylinder, a fixed block and a positive electrode. The cylinder is connected to the fixed frame II, the output end of the cylinder is connected to the fixed block, and the fixed block is connected to the positive electrode through the positive electrode insulating sheet. When in use, the cylinder drives the positive electrode to be pressed down through the fixed block, and the positive electrode is pressed down to fit the MCC laser, and the MCC laser is sealed and powered through the positive electrode.

[0019] Further preferably, a protrusion is provided at the lower end of the positive electrode, the shape of the protrusion is the same as the shape of the positioning groove, and the position corresponds to that of the positioning groove. After the protrusion is pressed down to the positioning groove, it fits the MCC laser, making it convenient for the positive electrode to seal and power the MCC laser.

[0020] Preferably, the cross-sections of the fixing block, the positive electrode insulating sheet and the positive electrode are all rectangular, which facilitates installation.

[0021] Preferably, at least two positioning mechanisms and at least two motion mechanisms are provided to improve work efficiency.

[0022] The test method of the above-mentioned MCC laser single-bar test device has the following operating steps:

[0023] (1) Connect the positive and negative electrodes to the test power supply, and place a sealing ring in the groove of the negative electrode liquid hole;

[0024] (2) Place the MCC laser with the front side facing upward in the positioning groove of the positioning plate. Through the precise positioning of the positioning groove, the liquid inlet and outlet of the MCC laser are aligned with the liquid hole of the negative electrode respectively;

[0025] (3) Start the test, the cylinder moves downward, so that the lower end of the positive electrode is pressed down and fits against the upper end of the MCC laser, forming a sealed circuit;

[0026] (4) Coolant is introduced into the base, and the coolant circulates in the sealed loop. The test power supply supplies power to the MCC laser, lights up the MCC laser, and then starts the data acquisition test;

[0027] (5) After the data acquisition test is completed, the test power supply stops supplying power, the coolant stops supplying, and the cylinder automatically resets;

[0028] (6) Take the MCC laser out of the positioning mechanism and complete the testing of the MCC laser.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention has a simple structure, convenient operation, high production efficiency, and can realize automatic positioning and fixation of the MCC laser, thereby ensuring the test accuracy of the MCC laser.

[0031] 2. The present invention automatically fixes the MCC laser through cylinder control, replacing the original manual screw method to fix the MCC laser, thereby increasing the production efficiency of the MCC laser single-bar test by more than 50%.

[0032] 3. The present invention accurately positions the MCC laser and seals the MCC laser through a cylinder-controlled motion mechanism, thereby preventing leakage of the MCC laser during testing and causing damage to the product. During operation, the operator does not directly contact the product, reducing product contamination and damage caused by human factors. At the same time, it ensures that the force on the MCC laser is stable when it is fixed, thereby improving the stability and accuracy of the test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the relative positions of the motion mechanism and the positioning mechanism of the present invention;

[0035] Figure 3 It is a schematic diagram of the motion structure splitting of the present invention;

[0036] Figure 4 Schematic diagram of the positive electrode structure of the present invention;

[0037] Figure 5 This is a schematic diagram of the positioning structure of the present invention;

[0038] Figure 6It is a schematic diagram of the structure of the positioning piece of the present invention;

[0039] Figure 7 Schematic diagram of the MCC laser structure of the present invention;

[0040] Figure 8 This is a partial structural diagram of the present invention in use;

[0041] Among them: 1. Fixed plate, 2. Fixed frame I, 3. Fixed frame II, 4. Moving mechanism, 5. Positioning mechanism, 6. Cylinder, 7. Fixed block, 8. Positive electrode insulating sheet, 9. Positive electrode, 10. Positioning sheet, 11. Negative electrode, 12. Negative electrode insulating sheet, 13. Base, 14. Screw hole, 15. Protrusion, 16. Liquid inlet hole, 17. Positive electrode screw hole, 18. Positioning groove, 19. Chamfer, 20. Notch, 21. Liquid outlet hole, 22. MCC laser, 23. Liquid through hole, 24. Light-emitting area. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to embodiments and accompanying drawings, but is not limited thereto.

[0043] Example 1:

[0044] like Figure 1-8 As shown, this embodiment provides an MCC laser single-bar test device, including a fixing plate 1, a fixing frame I2, a fixing frame II3, a motion mechanism 4 and a positioning mechanism 5, wherein:

[0045] A fixing frame I2 is provided on the fixing plate 1, a positioning mechanism 5 is provided on the fixing frame I2, an MCC laser 22 is provided on the positioning mechanism 5, a moving mechanism 4 is provided above the positioning mechanism 5, and the moving mechanism 4 is connected to the fixing plate 1 through the fixing frame II3. The MCC laser 22 is fixed to the positioning mechanism 5 by pressing down the moving mechanism 4, and a cooling liquid is introduced into the positioning mechanism 5 to cool the MCC laser.

[0046] The positioning mechanism 5 includes a base 13, a cathode 11 and a positioning piece 10. The base 13 is arranged on the fixing frame Ⅰ2. The cathode 11 is arranged on the base 13 through the cathode insulating piece 12. The positioning piece 10 is arranged on the cathode 11. A positioning groove 18 is arranged in the middle position of one side of the positioning piece 10. The positioning groove 18 has the same length and width as the MCC laser 22, which is convenient for accurately positioning the position of the MCC laser. The MCC laser 22 is arranged in the positioning groove 18, and the MCC laser is clamped and positioned by the positioning groove 18.

[0047] Two liquid holes 23 are set in the positioning mechanism 5. The liquid holes 23 pass through the negative electrode, the negative electrode insulating sheet and the base below the positioning groove in sequence. The positions of the two liquid holes 23 correspond to the liquid inlet 16 and the liquid outlet 21 of the MCC laser 22 in the positioning groove. A groove is set on the negative electrode liquid hole, and a sealing ring is set in the groove to achieve the sealing treatment of the negative electrode and the MCC laser.

[0048] The cross sections of the base 13 , the negative electrode insulating sheet 12 , the negative electrode 11 and the positioning sheet 10 are all rectangular, which facilitates installation.

[0049] The motion mechanism 4 includes a cylinder 6, a fixed block 7 and a positive electrode 9. The cylinder 6 is connected to the fixed frame II 3. The output end of the cylinder 6 is connected to the fixed block 7. The fixed block 7 is connected to the positive electrode 9 through the positive electrode insulating sheet 8. A screw hole 14 is provided on the fixed block. The fixed block is connected to the positive electrode insulating sheet and the positive electrode through bolts. When in use, the cylinder drives the positive electrode to be pressed down through the fixed block, and the positive electrode is pressed down to fit the MCC laser, and the MCC laser is sealed and powered through the positive electrode.

[0050] A protrusion 15 is set at the lower end of the positive electrode 9. The shape of the protrusion 15 is the same as that of the positioning groove 18, and the position corresponds to that of the positioning groove. After the protrusion is pressed down to the positioning groove, it fits the MCC laser, which facilitates the positive electrode to seal and power the MCC laser. The positive electrode is connected to the test power supply through the positive electrode screw hole 17.

[0051] The positive and negative electrode materials are metal materials with good conductive properties. The positive electrode insulating sheet is made of insulating material and is used to insulate the positive electrode from the fixed block. The negative electrode insulating sheet is made of material with good insulating properties and is used to insulate the negative electrode from the base.

[0052] The cross sections of the fixing block 7, the positive electrode insulating sheet 8 and the positive electrode 9 are all rectangular, which is convenient for installation.

[0053] Two positioning mechanisms 5 and two motion mechanisms 4 are provided to improve work efficiency.

[0054] The test method of the above-mentioned MCC laser single-bar test device has the following operating steps:

[0055] (1) Connect the positive and negative electrodes to the test power supply, and place a sealing ring in the groove of the negative electrode liquid hole;

[0056] (2) Place the MCC laser with the front side facing upward in the positioning groove of the positioning plate. Through the precise positioning of the positioning groove, the liquid inlet and outlet of the MCC laser are aligned with the liquid hole position of the negative electrode respectively;

[0057] (3) Start the test, the cylinder moves downward, so that the lower end of the positive electrode is pressed down and fits against the upper end of the MCC laser, forming a sealed circuit;

[0058] (4) Coolant is introduced into the base. The coolant is insulated and will not affect the use of the positive and negative electrodes. The coolant circulates in the sealed loop. The test power supply supplies power to the MCC laser, lights up the MCC laser, and then starts the data acquisition test;

[0059] (5) After the data acquisition test is completed, the test power supply stops supplying power, the coolant stops supplying, and the cylinder automatically resets;

[0060] (6) Take the MCC laser out of the positioning mechanism and complete the testing of the MCC laser.

[0061] Example 2:

[0062] An MCC laser single-bar testing device has a structure as described in Example 1, except that chamfers 19 are provided on both sides of the upper end of the positioning groove 18 to facilitate the removal and placement of the MCC laser, and a notch 20 is provided at the front end of the positioning groove 18 to prevent the light-emitting area at the front end of the MCC laser from being touched when removing and placing the MCC laser.

Claims

1. A testing method based on an MCC laser single-bar testing device, characterized in that: The MCC laser single bar test device includes a fixed plate, a fixed frame I, a fixed frame II, a motion mechanism and a positioning mechanism, wherein: A fixing frame I is provided on the fixing plate, a positioning mechanism is provided on the fixing frame I, an MCC laser is provided on the positioning mechanism, a motion mechanism is provided above the positioning mechanism, the motion mechanism is connected to the fixing plate through the fixing frame II, the MCC laser is fixed to the positioning mechanism by pressing down the motion mechanism, and a coolant is introduced into the positioning mechanism to cool the MCC laser; The positioning mechanism includes a base, a cathode and a positioning piece. The base is arranged on the fixing frame I. The cathode is arranged on the base through the cathode insulating piece. The positioning piece is arranged on the cathode. A positioning groove is arranged in the middle position of one side of the positioning piece. The positioning groove has the same length and width as the MCC laser. The MCC laser is arranged in the positioning groove. The motion mechanism includes a cylinder, a fixed block and a positive electrode. The cylinder is connected to the fixed frame II, the output end of the cylinder is connected to the fixed block, and the fixed block is connected to the positive electrode through the positive electrode insulating sheet. A protrusion is provided at the lower end of the positive electrode, and the shape of the protrusion is the same as that of the positioning groove and the position thereof corresponds; The above-mentioned test method based on the MCC laser single-bar test device has the following operating steps: (1) Connect the positive and negative electrodes to the test power supply, and place a sealing ring in the groove of the negative electrode liquid hole; (2) Place the MCC laser with the front side facing upward in the positioning groove of the positioning plate. Through the precise positioning of the positioning groove, the liquid inlet and outlet of the MCC laser are aligned with the liquid hole of the negative electrode respectively; (3) Start the test, the cylinder moves downward, so that the lower end of the positive electrode is pressed down and fits on the upper end of the MCC laser to form a sealed circuit; (4) Coolant is introduced into the base, and the coolant circulates in the sealed circuit. The test power supply supplies power to the MCC laser, lights up the MCC laser, and then starts the data acquisition test; (5) After the data acquisition test is completed, the test power supply stops supplying power, the coolant stops delivering, and the cylinder automatically resets; (6) Take the MCC laser out of the positioning mechanism and complete the testing of the MCC laser.

2. The testing method based on the MCC laser single-bar testing device according to claim 1, characterized in that: Two liquid holes are set in the positioning mechanism, and the liquid holes pass through the negative electrode, the negative electrode insulating sheet and the base below the positioning groove in sequence. The positions of the two liquid holes correspond to the liquid inlet and outlet positions of the MCC laser in the positioning groove respectively, and a groove is set on the negative electrode liquid hole.

3. The testing method based on the MCC laser single-bar testing device according to claim 2, characterized in that: Chamfers are respectively arranged on both sides of the upper end of the positioning groove, and a notch is arranged at the front end of the positioning groove.

4. The testing method based on the MCC laser single-bar testing device according to claim 1, characterized in that: The cross sections of the base, the negative electrode insulating sheet, the negative electrode and the positioning sheet are all rectangular.

5. The testing method based on the MCC laser single-bar testing device according to claim 1, characterized in that: The cross sections of the fixing block, the positive electrode insulating sheet and the positive electrode are all rectangular.

6. The testing method based on the MCC laser single-bar testing device according to claim 1, characterized in that: At least two positioning mechanisms and two motion mechanisms are provided.

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