Rapid measuring device for polarization direction of laser crystal

Abstract

The utility model provides a device for rapidly measuring the polarization direction of a laser crystal, which relates to the technical field of laser and comprises a laser pumping source, a crystal clamping jaw, a polaroid, a stepping motor, a power detector and a charging tray, the crystal clamping jaw is arranged on the laser pumping source, the polaroid is located between the laser pumping source and the crystal clamping jaw and installed on a rotating device connected with a rotating shaft of the stepping motor, and the power detector is located above the laser pumping source and used for receiving a laser beam emitted by the laser pumping source and used for exciting a laser crystal; and the charging tray is positioned on one side of the crystal clamping jaw and is used for placing a laser crystal. The polarization direction of the laser crystal can be quickly confirmed by utilizing automatic equipment and a precisely controlled rotary polaroid in cooperation with the change of measurement power, and the polarization direction test precision of the laser crystal can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, specifically to a device for rapid determination of the polarization direction of a laser crystal. Background Technology

[0002] In the design and manufacturing of lasers, the polarization direction of the laser crystal has a significant impact on the laser's output performance, efficiency, and stability. Especially when using solid-state lasers, the crystal's polarization direction needs to match the polarization direction of the laser pump source to maximize laser output power and gain. Therefore, accurately determining the polarization direction of the laser crystal is a critical task in laser research, development, production, and maintenance.

[0003] Currently, methods for determining the polarization direction of a laser crystal typically involve manually rotating the laser crystal or laser pump source and determining the optimal polarization matching direction by measuring the change in optical power. This method uses a semiconductor light source as the pump source, relying on the significant difference in polarization characteristics. The source or laser crystal is rotated, and the output laser power is recorded. Through multiple trials and measurements, the optimal laser crystal polarization direction is determined based on the relationship between power change and rotation angle. However, this traditional method has several drawbacks:

[0004] (1) Complex operation and long time consumption: It requires repeated rotation of the laser crystal or laser pump source, which is cumbersome and inefficient to operate manually and cannot meet the need for rapid confirmation of polarization direction.

[0005] (2) Low accuracy: In actual operation, due to the possible deviation in the coaxiality of the light source and the crystal, the output point of the beam cannot be kept consistent during the rotation process, resulting in a large measurement error and affecting accuracy.

[0006] (3) Difficult to adapt to mass production: Since this method relies on manual operation, the operation process is complex and has poor repeatability, making it difficult to use in large-scale production and unable to effectively improve production efficiency.

[0007] Therefore, there is an urgent need for a fast, accurate and easy-to-operate device for confirming the polarization direction of laser crystals, in order to improve the efficiency of laser research and development and production, and meet the requirements of accuracy and mass production. Utility Model Content

[0008] In view of this, the purpose of this utility model is to propose a rapid laser crystal polarization direction determination device. By using automated equipment and a precisely controlled rotating polarizer, combined with the measurement of power changes, the polarization direction of the laser crystal can be quickly determined. By optimizing the process of laser crystal polarization direction determination, the operation steps are simplified, overcoming the problems of complex operation, long time consumption and low accuracy in traditional methods and devices. It has high accuracy and efficiency, and is especially suitable for batch applications in the research, development, production and maintenance of lasers.

[0009] To achieve the above objectives, the present invention provides the following technical solutions:

[0010] To achieve the above objectives, this utility model provides a rapid laser crystal polarization direction determination device, comprising a laser pump source, a crystal gripper, a polarizer, a stepper motor, a power detector, and a material tray; the crystal gripper is disposed on the laser pump source, the polarizer is located between the laser pump source and the crystal gripper and is mounted on a rotating device connected to the stepper motor shaft, the power detector is located above the laser pump source and receives the laser beam emitted by the laser pump source for exciting the laser crystal; the material tray is located on one side of the crystal gripper and is used to place the laser crystal.

[0011] Preferably, the power probe of the power detector is positioned on the laser beam path emitted by the laser pump source, and the crystal clamp is used to fix the laser crystal and adjust the position of the laser crystal onto the laser beam path between the power detector and the laser pump source.

[0012] Preferably, the laser crystal fixed by the crystal gripper is suspended 1 mm above the upper surface of the laser pump source.

[0013] Preferably, the stepper motor is connected to the state switching shaft of the rotating device, the polarizer is mounted on the state switching shaft, and the polarizer is driven by the stepper motor to switch its position between the laser pump source and the crystal gripper.

[0014] Preferably, the polarizer includes polarizer A and polarizer B, which are mounted on both sides of the state switching shaft. The state switching shaft is driven to rotate by a stepper motor, so that polarizer A and polarizer B switch between the laser pump source and the crystal gripper.

[0015] Preferably, polarizer A and polarizer B are used to adjust the polarization direction of the laser pump source. Polarizer A has the same polarization direction as the laser pump source, and polarizer B has a 45-degree angle with the polarization direction of the laser pump source.

[0016] Preferably, polarizer A and polarizer B are both half-wavelength glass plates corresponding to the pump laser.

[0017] Preferably, the tray includes tray A and tray B, used to hold laser crystals after they have been sorted by the crystal grippers.

[0018] Preferably, the polarizer is a 1 / 2 wavelength glass plate with a single design corresponding to the pump laser. The glass plate is rotated around the state switching axis, and the pump laser from the laser pump source is incident on the rod-shaped laser crystal through this glass plate.

[0019] Preferably, the laser pump source, crystal gripper, stepper motor and power detector are all connected to the controller 5.

[0020] Compared with existing technologies, the laser crystal polarization direction rapid determination device proposed in this utility model has the following advantages:

[0021] 1. The laser crystal polarization direction rapid determination device of this utility model can avoid the accuracy deviation caused by coaxiality error, improper operation and other factors in the traditional manual measurement process by precisely controlling the rotation angle of the polarizer and combining it with the real-time monitoring of laser power changes by a power sensor. This ensures the accurate determination of the laser crystal polarization direction. By combining the rotation of the polarizer with the power measurement process, the operation process is simplified. Users only need to start the device and make a few settings, which greatly reduces the complexity of manual operation.

[0022] 2. This invention provides a rapid laser crystal polarization direction determination device that can complete the polarization direction testing of multiple laser crystals in a short time, significantly improving the efficiency of batch testing. No equipment readjustment or setup is required during each measurement, enabling efficient testing of each laser crystal and immediate results. This makes the rapid laser crystal polarization direction determination device ideal for use in laser production, assembly, and quality inspection processes, meeting the high requirements for testing speed and efficiency in large-scale production.

[0023] 3. The polarization direction of a laser crystal directly affects the performance of a laser. Accurately and quickly confirming the crystal's polarization direction can effectively avoid performance loss or production waste caused by incorrect polarization. Using the laser crystal polarization direction rapid determination device of this invention, suitable crystals can be quickly screened during laser research and development and production, reducing rework or waste caused by inaccurate testing or misjudgment. In mass production, quickly and accurately determining the polarization direction of each laser crystal not only improves product consistency and stability but also enhances the efficiency of the entire production line, ensuring the stability and reliability of laser performance.

[0024] 4. The rapid laser crystal polarization direction determination device of this invention can adapt to laser crystals of different shapes, such as rectangular and rod-shaped laser crystals. For rod-shaped crystals, the polarization direction can also be accurately measured by adjusting the rotation angle of the polarizer. This versatility and flexibility allows the rapid laser crystal polarization direction determination device of this invention to function in various application scenarios, not only suitable for scientific research laboratories, but also for laser manufacturing companies and laser maintenance work.

[0025] 5. By measuring the polarization direction with high precision, performance instability or quality problems caused by incorrect crystal polarization direction in lasers can be effectively reduced, improving the overall quality and consistency of the product. This is crucial for high-quality laser production, especially in demanding industrial applications and scientific research fields. The laser crystal polarization direction rapid measurement device of this invention helps ensure that the output performance of each laser meets design requirements.

[0026] In summary, this novel rapid polarization direction determination device for laser crystals, with its advantages of high precision, high efficiency, and simple operation, can effectively improve the accuracy of laser crystal polarization direction testing, simplify the operation process, increase production efficiency, reduce human error and production costs, and ensure the high quality and consistency of lasers. This device is not only suitable for scientific research and laboratory fields but can also meet the needs of large-scale production processes, making it an efficient and reliable technical solution.

[0027] These or other aspects of this application will become more apparent from the following description of embodiments. It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the application. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the accompanying drawings used in the description of the exemplary embodiments or related technologies will be briefly introduced below. The drawings are used to provide a further understanding of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain this utility model and do not constitute a limitation on this utility model. In the drawings:

[0029] Figure 1 This is a schematic diagram of a rectangular laser crystal measurement device for rapidly determining the polarization direction of a laser crystal, according to an embodiment of this utility model.

[0030] Figure 2 This is a schematic diagram of the structure of a rapid laser crystal polarization direction determination device according to an embodiment of the present invention, used for measuring rod-shaped laser crystals.

[0031] Marked in the image:

[0032] 1-Laser pump source, 2-Crystal gripper, 3-Polarizer, 31-Polarizer A, 32-Polarizer B, 4-Stepper motor, 5-Controller, 6-Power detector, 61-Power probe, 7-Panel, 71-Panel A, 72-Panel B. Detailed Implementation

[0033] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model are further described in detail below with reference to specific examples and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit this application.

[0035] It should be noted that all uses of the terms "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two different entities or different parameters with the same name. Therefore, "first" and "second" are merely for convenience of expression and should not be construed as limiting the embodiments of this utility model. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as other steps or units inherent in a process, method, system, product, or device that includes a series of steps or units.

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0038] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] See Figure 1 and Figure 2As shown, an embodiment of this utility model provides a rapid laser crystal polarization direction determination device, including a laser pump source 1, a crystal gripper 2, a polarizer 3, a stepper motor 4, a power detector 6, and a material tray 7. The crystal gripper 2 is disposed on the laser pump source 1. The polarizer 3 is located between the laser pump source 1 and the crystal gripper 2 and is mounted on a rotating device connected to the shaft of the stepper motor 4. The power detector 6 is located above the laser pump source 1 and receives the laser beam emitted by the laser pump source 1 to excite the laser crystal. The material tray 7 is located on one side of the crystal gripper 2 and is used to place the laser crystal.

[0040] In this embodiment, the power probe 61 of the power detector 6 is positioned on the laser beam path emitted by the laser pump source 1, and the crystal clamp 2 is used to fix the laser crystal and adjust its position on the laser beam path between the power detector 6 and the laser pump source 1. Specifically, the laser crystal fixed by the crystal clamp 2 is suspended 1 mm above the upper surface of the laser pump source 1.

[0041] In this embodiment, the stepper motor 4 is connected to the state switching shaft of the rotating device, the polarizer 3 is mounted on the state switching shaft, and the polarizer 3 is driven by the stepper motor 4 to switch its position between the laser pump source 1 and the crystal gripper 2.

[0042] In some embodiments, see Figure 1 As shown, the polarizer 3 includes polarizer A 31 and polarizer B 32. Polarizer A 31 and polarizer B 32 are installed on both sides of the state switching shaft. The state switching shaft is driven to rotate by stepper motor 4, so that polarizer A 31 and polarizer B 32 switch between laser pump source 1 and crystal gripper 2.

[0043] The polarizers A 31 and B 32 are used to adjust the polarization direction of the laser pump source 1. The polarizer A 31 has the same polarization direction as the laser pump source 1, and the polarizer B 32 is at a 45-degree angle to the polarization direction of the laser pump source 1.

[0044] In this embodiment, polarizer A 31 and polarizer B 32 are both half-wavelength glass slides corresponding to the pump laser. The tray 7 includes tray A 71 and tray B 72, used to hold laser crystals sorted by the crystal grippers 2.

[0045] In some embodiments, see Figure 2 The polarizer 3 shown is a 1 / 2 wavelength glass plate with a single-piece design corresponding to the pump laser. The glass plate is rotated around the state switching axis, and the pump laser of the laser pump source 1 is incident on the rod-shaped laser crystal through this glass plate.

[0046] This invention relates to a rapid laser crystal polarization direction determination device, which can complete the polarization direction testing of multiple laser crystals in a short time, significantly improving the efficiency of batch testing. No equipment readjustment or setup is required during each measurement, enabling efficient testing of each laser crystal and immediate results. This makes the device ideal for use in the production, assembly, and quality inspection of lasers, meeting the high demands for testing speed and efficiency in large-scale production.

[0047] In the working principle of the laser crystal polarization direction rapid determination device provided by this utility model, see [link to relevant documentation]. Figure 1 As shown, if the laser crystal is cut into a rectangle, it is only necessary to determine which right-angle side the laser crystal polarization direction is along. The process for rapidly determining the polarization direction of a laser crystal is as follows:

[0048] (1) After the laser pump source 1 is powered on, the laser crystal is suspended about 1 mm away from the upper surface of the laser pump source 1 by the crystal clamp 2. The polarizer A 31 is rotated between the laser pump source 1 and the laser crystal, and the power I measured by the power detector 6 at this time is automatically recorded.

[0049] (2) Keep the laser crystal and laser pump source 1 stationary, and drive the stepper motor 4 to rotate the rotating device through the controller 5. Rotate the polarizer B 32 between the laser pump source 1 and the laser crystal through the state switching shaft, and record the power 2 measured by the power detector 6 at this time.

[0050] (3) Determine the polarization direction of the laser crystal based on the measured power 1 and power 2. If power 1 is greater than power 2, control the crystal gripper 2 to place the laser crystal in tray A 71; otherwise, control the crystal gripper 2 to place the laser crystal in tray B 72.

[0051] See Figure 2 As shown, if the laser crystal is processed into a rod shape, during rapid determination of the laser crystal polarization direction, the original two polarizers, A31 and B32, are replaced with a single glass plate corresponding to a larger pump laser wavelength of 1 / 2 wavelength. The glass plate can rotate along its central axis. The laser pump source 1 is still incident on the rod-shaped laser crystal through this glass plate. As the glass plate rotates, the polarization state of the pump laser passing through the glass plate and incident on the laser crystal changes systematically. That is, the rotation degree of the glass plate multiplied by 2 is the current polarization direction of the pump source. During the rotation, the position with the highest output power corresponds to the rotation angle α of polarizer 3. Therefore, the polarization direction of the laser crystal is 2α. The crystal chuck is then rotated by 2α angles and placed in the material tray 7.

[0052] This invention provides a rapid laser crystal polarization direction determination device that can adapt to laser crystals of different shapes, such as rectangular and rod-shaped laser crystals. For rod-shaped crystals, the polarization direction can also be accurately measured by adjusting the rotation angle of the polarizer 3. This versatility and flexibility allows this invention to function in various application scenarios, suitable not only for scientific research laboratories but also for laser manufacturing companies and laser maintenance work.

[0053] In this embodiment, the laser pump source 1, crystal gripper 2, stepper motor 4, and power detector 6 are all connected to the controller 5. This novel rapid laser crystal polarization direction determination device, by precisely controlling the rotation angle of the polarizer 3 and combining it with a power sensor to monitor laser power changes in real time, avoids accuracy deviations caused by coaxiality errors and improper operation during traditional manual measurement, ensuring accurate determination of the laser crystal polarization direction. By combining the rotation of the polarizer 3 with the power measurement process, the operation is simplified; the user only needs to start the device and make a few settings, greatly reducing the complexity of manual operation.

[0054] The polarization direction of a laser crystal directly affects its performance. Accurate and rapid confirmation of the crystal's polarization direction can effectively prevent performance loss or production waste caused by incorrect polarization. Using the rapid laser crystal polarization direction determination device of this invention, suitable crystals can be quickly screened during laser research and development and production, reducing rework or waste caused by inaccurate testing or misjudgment. In mass production, quickly and accurately determining the polarization direction of each laser crystal not only improves product consistency and stability but also enhances the efficiency of the entire production line, ensuring the stability and reliability of laser performance.

[0055] High-precision polarization direction determination can effectively reduce performance instability or quality problems caused by incorrect crystal polarization direction in lasers, improving the overall quality and consistency of products. This is crucial for high-quality laser production, especially in demanding industrial applications and scientific research fields. The laser crystal polarization direction rapid determination device of this invention helps ensure that the output performance of each laser meets design requirements.

[0056] In summary, this novel rapid polarization direction determination device for laser crystals, with its advantages of high precision, high efficiency, and simple operation, can effectively improve the accuracy of laser crystal polarization direction testing, simplify the operation process, increase production efficiency, reduce human error and production costs, and ensure the high quality and consistency of lasers. This device is not only suitable for scientific research and laboratory fields but can also meet the needs of large-scale production processes, making it an efficient and reliable technical solution.

[0057] The above are exemplary embodiments disclosed in this utility model. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this utility model as defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this utility model may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0058] It should be understood that, as used herein, the singular form "a" is intended to include the plural form as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations of one or more of the associatedly listed items. The embodiment numbers disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0059] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the framework of the present invention, technical features of the above embodiments or different embodiments can also be combined, and many other variations of different aspects of the present invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for rapid determination of the polarization direction of a laser crystal, characterized in that, The device includes a laser pump source, a crystal gripper, a polarizer, a stepper motor, a power detector, and a tray. The crystal gripper is mounted on the laser pump source. The polarizer is located between the laser pump source and the crystal gripper and is mounted on a rotating device connected to the stepper motor shaft. The power detector is located above the laser pump source and receives the laser beam emitted by the laser pump source to excite the laser crystal. The tray is located on one side of the crystal gripper and is used to place the laser crystal.

2. The rapid laser crystal polarization direction determination device as described in claim 1, characterized in that, The power probe of the power detector is positioned on the path of the laser beam emitted by the laser pump source, and the crystal clamp is used to fix the laser crystal and adjust the position of the laser crystal on the laser beam path between the power detector and the laser pump source.

3. The rapid laser crystal polarization direction determination device as described in claim 2, characterized in that, The laser crystal, fixed by the crystal gripper, is suspended 1 mm above the laser pump source.

4. The rapid laser crystal polarization direction determination device as described in claim 1, characterized in that, The stepper motor is connected to the state switching shaft of the rotating device. The polarizer is mounted on the state switching shaft and is driven by the stepper motor to switch its position between the laser pump source and the crystal gripper.

5. The rapid laser crystal polarization direction determination device as described in claim 4, characterized in that, The polarizer includes polarizer A and polarizer B, which are installed on both sides of the state switching shaft. The state switching shaft is driven to rotate by a stepper motor, so that polarizer A and polarizer B switch between the laser pump source and the crystal gripper.

6. The rapid laser crystal polarization direction determination device as described in claim 5, characterized in that, The polarizers A and B are used to adjust the polarization direction of the laser pump source. Polarizer A has the same polarization direction as the laser pump source, and polarizer B has a 45-degree angle with the polarization direction of the laser pump source.

7. The rapid laser crystal polarization direction determination device as described in claim 6, characterized in that, Both polarizer A and polarizer B are half-wavelength glass plates corresponding to the pump laser.

8. The rapid laser crystal polarization direction determination device as described in claim 7, characterized in that, The trays include tray A and tray B, which are used to hold laser crystals after they have been sorted by the crystal grippers.

9. The rapid laser crystal polarization direction determination device as described in claim 4, characterized in that, The polarizer is a 1 / 2 wavelength glass plate with a single design corresponding to the pump laser. The glass plate is rotated around the state switching axis, and the pump laser from the laser pump source is incident on the rod-shaped laser crystal through this glass plate.

10. The rapid laser crystal polarization direction determination device as described in claim 1, characterized in that, The laser pump source, crystal gripper, stepper motor, and power detector are all connected to the controller.

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