Device for improving power of quantum cascade laser based on wavelength beam combination

Abstract

The utility model discloses a device for improving the power of a quantum cascade laser based on wavelength beam combination, which comprises a beam combination device box and a top cover arranged at the top end of the beam combination device box, the top cover is fixedly connected with the beam combination device box through a plurality of screws, and a laser emission window is arranged on the right side of the center of the front end of the beam combination device box. The laser emitting window is communicated with the interior of the beam combining device box, and a window lens is arranged in the laser emitting window. The beneficial effects are that novel flexible height adjusting devices are additionally arranged on the outer walls of the left and right ends of the four corners of the beam combining device box; according to the device, the beam combining device box can be stably installed on a station, and the installation time and the labor cost are saved through screw fixation. The height adjustment is flexible and accurate, the height setting nut is rotated to drive the lifting screw rod to change the height of the device, the requirements of different scenes are met, the height pointing mark at the front end of the main fixing block is matched with the height scale mark on the outer wall of the vertical anti-rotation barrier strip, the lifting height is accurately displayed and controlled, and the use convenience and accuracy of the device are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of optoelectronics, especially to a device for improving quantum cascade laser power based on wavelength beam combining. BACKGROUND

[0002] With the continuous development of modern semiconductor technology and optical technology, the output power of quantum laser gradually increases, but the output power of single tube quantum laser still cannot meet the needs of medium and long wave photoelectric countermeasures. At present, the output power of quantum cascade laser is improved by using a spatial splicing scheme, which splices the output laser of 3-7 quantum cascade tube cores in space to realize high-power output. This technical scheme is consistent with the number of tube cores used for output light spot, does not utilize subsequent beam expansion and focusing optical design, and limits the subsequent use of quantum cascade laser. The method for improving quantum cascade laser power based on wavelength beam combining combines two quantum cascade lasers by wavelength beam combining, and the combined output light spot is a nearly Gaussian spot, which is beneficial to subsequent beam expansion or fiber coupling. In the application process of the device for improving quantum cascade laser power based on wavelength beam combining, the height adjustment requirement of the device is highlighted in the actual use scene. The traditional device has many deficiencies in height adjustment, which provides an urgent background for the research and development of a flexible height adjustment device.

[0003] In many practical application scenarios, the quantum cascade laser power improvement device needs to be adapted to different optical equipment, experimental platforms or working environments. For example, in some high-precision optical experiments, the device needs to be accurately aligned with other optical elements to ensure that the transmission path and interference effect of the laser meet the experimental requirements. On the industrial production line, the height of the device needs to be adjusted flexibly according to different production processes to achieve the best processing effect and production efficiency. However, the existing device height adjustment method often has the problems of inflexible adjustment and insufficient precision. Some traditional devices adopt fixed height design and cannot adapt to the height change requirement of different working scenes, which limits the application range and flexibility of the device. Even some devices have height adjustment function, but the adjustment method is complex and requires tedious operation with multiple tools, which consumes a lot of time and labor, and the adjustment precision is difficult to guarantee, which may cause laser path deviation and affect the beam combining effect and the final laser output power. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a device for improving quantum cascade laser power based on wavelength beam combining, which aims to solve the problem that the quantum cascade laser power improvement device needs to be adapted to different equipment, platforms and environments in practical application, the existing height adjustment method has the problems of inflexible adjustment and insufficient precision, some devices have fixed height and cannot adapt to height change, and the devices with adjustment function also have the problems of complex operation, time-consuming and labor-consuming, and difficult to guarantee precision, which affect beam combining and output power.

[0005] In order to solve the above problems, the utility model provides a kind of device based on wavelength beam combination to promote quantum cascade laser power, including beam combination device box and the top cover of being arranged at the top of beam combination device box, the top cover is fixedly connected by multiple screws with beam combination device box, laser emission window is arranged at the right side of the center of beam combination device box front end, the laser emission window is communicated with the inside of beam combination device box, window lens is arranged in the inside of laser emission window, laser collimation window A is arranged in the inside of left side of the center of beam combination device box rear end, laser collimation window B is arranged in the inside of right side of the center of beam combination device box rear end, and laser collimation window B and laser collimation window A are symmetrically arranged between, flexible height adjusting device is arranged in the left and right ends of the proximity of four corners of beam combination device box.

[0006] In an embodiment, the flexible height adjusting device of the right end outer wall of the beam combination device box includes fixed height nut, main fixed block, clamping fixed nut and lifting screw rod, the main fixed block is fixed in the right end outer wall of beam combination device box, the main fixed block is provided with lifting hole in the inside, the lifting screw rod is inserted into the lifting hole, the lifting screw rod can move up and down in the lifting hole, the fixed height nut and the clamping fixed nut are respectively threadedly connected to the outside of the lifting screw rod, and the fixed height nut and the clamping fixed nut are respectively located at the bottom and top of the main fixed block.

[0007] In an embodiment, the flexible height adjusting device further includes mounting fixed sheet and screw hole, the mounting fixed sheet is welded at the bottom end of the lifting screw rod, the screw hole is arranged in the inside of the front and back sides of the center of the mounting fixed sheet, the fixed height nut can be moved up and down on the outside of the lifting screw rod by thread action by clockwise and counterclockwise rotation, and the clamping fixed nut can be moved down and up on the outside of the lifting screw rod by thread action by clockwise and counterclockwise rotation.

[0008] In an embodiment, the flexible height adjusting device further includes anti-dropping top sheet and vertical anti-rotation stop bar, the anti-dropping top sheet is sleeved and fixed on the top end of the lifting screw rod, the vertical anti-rotation stop bar is welded on the front end bottom of the anti-dropping top sheet, and the vertical anti-rotation stop bar is attached to the front end outer wall of the main fixed block, and the vertical anti-rotation stop bar can prevent the lifting screw rod from rotating in the lifting hole.

[0009] In an embodiment, the flexible height adjusting device further includes height scale and height pointing mark, the height scale is arranged on the front end outer wall of the vertical anti-rotation stop bar, and the bottom end of the height scale is the initial end of scale line, the height pointing mark is arranged on the front end outer wall of the bottom of the main fixed block, and the sharp end of the height pointing mark is aligned with the height scale.

[0010] In an embodiment, the laser collimation window A is provided with a collimation lens fixing plate A vertically fixed inside the beam combining device box, and the collimation lens fixing plate A is internally provided with a laser collimation lens A.

[0011] In an embodiment, the collimation lens fixing plate A is provided with an inclined fixing plate A internally provided with a high-reflection lens, and the inclined fixing plate A is provided at an inclined angle of forty-five degrees from front left to back right, and the laser collimation window A coincides with the center points of the laser collimation lens A and the high-reflection lens on the same straight line.

[0012] In an embodiment, the laser collimation window B is provided with a collimation lens fixing plate B vertically fixed inside the beam combining device box, and the collimation lens fixing plate B is internally provided with a laser collimation lens B.

[0013] In an embodiment, the collimation lens fixing plate B is provided with an inclined fixing plate B internally provided with a laser beam combining dichroic lens, and the inclined fixing plate B is provided at an inclined angle of forty-five degrees from front right to back left, and the laser collimation window B coincides with the center points of the laser collimation lens B and the laser beam combining dichroic lens on the same straight line.

[0014] In an embodiment, the center points of the high-reflection lens and the laser beam combining dichroic lens coincide on the same horizontal straight line, that is, the high-reflection lens can accurately reflect the laser beam onto the laser beam combining dichroic lens, and the center points of the laser beam combining dichroic lens and the window lens coincide front and back.

[0015] Beneficial effects: the technical scheme of the utility model discloses a flexible height adjusting device is increased on the left and right end outer walls of the beam combining device box near the four corners, the flexible height adjusting device can stably install the beam combining device box on the use station, and the use height of the beam combining device box can be flexibly changed by adjusting the device, the installation fixed bottom sheet of the device can be quickly and directly fixed on the use station through the screw in the screw hole, greatly saving the installation time and labor cost, secondly, the height of the flexible height adjusting device is adjusted flexibly and accurately, the fixed height nut rotates to drive the lifting screw rod to move up and down, and the installation height of the beam combining device box can be easily changed to adapt to the height requirement of different use scenes, meanwhile, the vertical anti-rotation stop bar is blocked in the front end of the main fixed block, effectively prevents the lifting screw rod from rotating in the adjusting process, ensures the stability and accuracy of the adjustment, in addition, the height direction mark at the front end of the main fixed block cooperates with the height scale line on the outer wall of the vertical anti-rotation stop bar, can accurately display and control the lifting height, greatly improves the convenience and accuracy of the device use. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 is a right view perspective structural schematic diagram of a device for improving power of quantum cascade laser based on wavelength beam combination of the present application;

[0018] Figure 2 is a rear view perspective structural schematic diagram of a device for improving power of quantum cascade laser based on wavelength beam combination of the present application;

[0019] Figure 3 is a right view plane structural schematic diagram of a device for improving power of quantum cascade laser based on wavelength beam combination of the present application;

[0020] Figure 4 is a cross-sectional perspective structural schematic diagram of a device for improving power of quantum cascade laser based on wavelength beam combination of the present application;

[0021] Figure 5 is a beam combination principle schematic diagram of a device for improving power of quantum cascade laser based on wavelength beam combination of the present application;

[0022] Figure 6 is a right view perspective structural schematic diagram of a flexible height adjusting device of the present application.

[0023] The following is the explanation of the reference signs:

[0024] 1, window lens; 2, laser emission window; 3, flexible height adjusting device; 4, beam combination device box; 5, top cover; 6, laser collimation window A; 7, laser collimation window B; 8, collimation lens fixing plate A; 9, laser collimation lens A; 10, high reflection lens; 11, inclined fixing plate A; 12, laser collimation lens B; 13, collimation lens fixing plate B; 14, laser beam combination dichroic lens; 15, inclined fixing plate B; 16, mounting and fixing bottom sheet; 17, screw hole; 18, height fixing nut; 19, main fixing block; 20, clamping and fixing nut; 21, lifting screw; 22, anti-falling top sheet; 23, vertical anti-rotation stop bar; 24, height scale line; 25, height direction marker. DETAILED DESCRIPTION

[0025] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0026] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", etc. should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, if the embodiments of the present application involve "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0029] The present application provides Figures 1-6The device for improving the power of quantum cascade laser based on wavelength beam combining shown in the figure includes a beam combining device box 4 and a top cover 5 arranged at the top end of the beam combining device box 4. The top cover 5 is fixedly connected with the beam combining device box 4 through a plurality of screws. The beam combining device box 4 serves as the main bearing structure of the whole device, provides mounting space for various internal components, plays a role in protecting the internal components and supporting the overall structure, and ensures that the components work cooperatively in a stable environment. The top cover 5 can protect the internal components of the beam combining device box 4, prevent dust and sundries from entering, and to some extent, protect the internal components from external collisions. A laser emission window 2 is arranged at the right side of the center of the front end of the beam combining device box 4 and is in communication with the inside of the beam combining device box 4. A window lens 1 is arranged inside the laser emission window 2. The laser emission window 2 is the output channel of the combined laser, which ensures that the laser can be accurately emitted from the device. The window lens 1 inside the laser emission window 2 can stabilize and optimize the emitted laser, ensuring the quality and output effect of the laser. A laser collimator window A 6 is arranged inside the left side of the center of the rear end of the beam combining device box 4, and a laser collimator window B 7 is arranged inside the right side of the center of the rear end of the beam combining device box 4. The laser collimator window B 7 is symmetrically arranged between the laser collimator window A 6. The laser collimator window A 6 and the laser collimator window B 7 respectively provide a channel for the laser beams of the low-power quantum cascade lasers A and B to enter the inside of the beam combining device box 4, and ensure that the laser beams enter at a suitable angle and position, which is convenient for subsequent collimation operation with the internal collimator lens. The symmetrical arrangement of the two helps to achieve balance and symmetry of the optical path, improving the beam combining effect.

[0030] As shown in Figure 1 , Figure 4 and Figure 5 , a collimator lens fixing plate A 8 is arranged at the front side of the laser collimator window A 6, which is vertically fixed inside the beam combining device box 4. A laser collimator lens A 9 is arranged inside the collimator lens fixing plate A 8. A collimator lens fixing plate B 13 is arranged at the front side of the laser collimator window B 7, which is vertically fixed inside the beam combining device box 4. A laser collimator lens B 12 is arranged inside the collimator lens fixing plate B 13. The collimator lens fixing plate A 8 and the collimator lens fixing plate B 13 are vertically fixed inside the beam combining device box 4, which is used to stably install the laser collimator lens A 9 and the laser collimator lens B 12, and ensure the accurate position of the collimator lens, providing a stable support structure for the collimation of the laser. The laser collimator lens A 9 and the laser collimator lens B 12 respectively collimate the laser beams emitted by the low-power quantum cascade lasers A and B, adjust the divergent laser beams to parallel or nearly parallel beams, reduce the divergence angle of the laser beams, improve the directionality and quality of the laser, and provide a good basis for subsequent reflection, beam combining and other operations.

[0031] As shown in Figure 1 , Figure 4And Figure 5 As shown, the front side of the collimating lens fixing plate A8 is provided with an inclined fixing plate A11, the inside of the inclined fixing plate A11 is provided with a high reflection lens 10, the inclined fixing plate A11 is arranged at a front left rear right forty-five degree angle, the laser collimating window A6 coincides with the center points of the laser collimating lens A9 and the high reflection lens 10 on the same straight line, the front side of the collimating lens fixing plate B13 is provided with an inclined fixing plate B15, the inside of the inclined fixing plate B15 is provided with a laser beam combining dichroic lens 14, the inclined fixing plate B15 is arranged at a front right rear left forty-five degree angle, the laser collimating window B7 coincides with the center points of the laser collimating lens B12 and the laser beam combining dichroic lens 14 on the same straight line, the center points of the high reflection lens 10 and the laser beam combining dichroic lens 14 coincide on the same horizontal straight line, that is, the high reflection lens 10 can accurately reflect the laser beam to the laser beam combining dichroic lens 14, the laser beam combining dichroic lens 14 coincides with the center points of the window lens 1 in front and back, the high reflection lens 10 arranged in the inclined fixing plate A11 is arranged at a front left rear right forty-five degree angle, which can accurately reflect the laser beam collimated by the laser collimating lens A9 to the laser beam combining dichroic lens 14, the laser beam combining dichroic lens 14 arranged in the inclined fixing plate B15 is arranged at a front right rear left forty-five degree angle, which is used to receive the laser beam collimated by the laser collimating lens B12 from the low-power quantum cascade laser B, and performs beam combining operation with the laser beam reflected from the high reflection lens 10, the setting of the inclined angle ensures the reasonable layout of the optical path and the accurate transmission and beam combining of the laser, and the high reflection lens 10 can efficiently reflect the laser, accurately reflecting the laser beam collimated by the low-power quantum cascade laser A to the laser beam combining dichroic lens 14, ensuring that the two laser beams can accurately meet at the laser beam combining dichroic lens 14, providing conditions for beam combining operation, and the laser beam combining dichroic lens 14 is a key component for realizing wavelength beam combining, which can combine two laser beams from different lasers, and make the combined laser coaxial through the HR mirror, finally realizing the beam combining of two relatively low-power quantum cascade lasers into a higher-power laser output, solving the problem of outputting multiple laser spots by the existing spatial splicing method, and facilitating subsequent optical design.

[0032] As Figure 1 , Figure 2 , Figure 3 , Figure 4 And Figure 5As shown, the device aims to solve the problem that the existing spatial splicing method outputs multiple laser spots, causing inconvenience in subsequent optical design. By wavelength beam combining, two relatively low-power quantum cascade lasers are combined into a higher-power laser output. By setting two quantum cascade lasers, the laser beam of low-power quantum cascade laser A enters the beam combining device box 4 through the laser collimation window A6, and is directed to the laser collimation lens A9 in the collimation lens fixed plate A8. The laser beam of low-power quantum cascade laser B enters the box through the laser collimation window B7, and is directed to the laser collimation lens B12 in the collimation lens fixed plate B13. The collimation divergence angle is usually determined as 2-3 mrad. The laser emitted by the low-power quantum cascade laser A is collimated by the laser collimation lens A9, and is incident on the high-reflective lens 10 which is tilted by forty-five degrees from front left to rear right in the tilt fixed plate A11. The high-reflective lens 10 accurately reflects the laser to the laser beam combining dichroic lens 14 which is in the same horizontal line. At the same time, the laser emitted by the low-power quantum cascade laser B is collimated by the laser collimation lens B12, and is directly incident on the laser beam combining dichroic lens 14 which is tilted by forty-five degrees from front right to rear left in the tilt fixed plate B15. The laser beam combining dichroic lens 14 combines the two lasers from different lasers, and makes the combined laser coaxial through the HR mirror. The combined and coaxial laser is finally emitted through the laser emitting window 2 which is in communication with the inside of the beam combining device box 4. The window lens 1 arranged inside the emitting window ensures the stability of the laser emission. Compared with the traditional spatial splicing method, the wavelength beam combining method can improve the output laser power while outputting a single laser spot, greatly facilitating the subsequent optical design, and has universality and flexibility, and can be applied to the fields of semiconductor lasers, photoelectric countermeasures and the like.

[0033] As Figure 1 and Figure 6As shown, the beam combining device box 4 is provided with flexible height adjusting devices 3 near the left and right ends of the four corners, the flexible height adjusting device 3 on the right end outer wall of the beam combining device box 4 includes a height fixing nut 18, a main fixed block 19, a clamping fixed nut 20 and a lifting screw 21, the main fixed block 19 is fixed on the right end outer wall of the beam combining device box 4, the main fixed block 19 is provided with a lifting hole inside, the lifting hole is inserted with the lifting screw 21, the lifting screw 21 can move up and down in the lifting hole, the lifting screw 21 is respectively threaded with the height fixing nut 18 and the clamping fixed nut 20 outside, the height fixing nut 18 and the clamping fixed nut 20 are respectively located at the bottom and the top of the main fixed block 19, the flexible height adjusting device 3 further includes a mounting fixed bottom sheet 16 and a screw hole 17, the mounting fixed bottom sheet 16 is welded at the bottom end of the lifting screw 21, the mounting fixed bottom sheet 16 is provided with screw holes 17 inside at the center of the front and back sides, the flexible height adjusting device 3 can be stably fixed on the use station by screwing through the screw holes 17, ensuring that the entire beam combining device box 4 has a reliable support foundation in the subsequent adjustment and working process, the height fixing nut 18 can move up and down outside the lifting screw 21 through the thread action by rotating clockwise and counterclockwise, the clamping fixed nut 20 can move up and down outside the lifting screw 21 through the thread action by rotating clockwise and counterclockwise, when the height of the beam combining device box 4 needs to be adjusted, the height fixing nut 18 can move up or down on the lifting screw 21 by rotating clockwise and counterclockwise, and the transmission action of the thread, and then drive the lifting screw 21 to move up and down in the lifting hole, so as to change the height of the beam combining device box 4, the clamping fixed nut 20 plays a role in auxiliary fixing and fine adjustment, and also by rotating clockwise and counterclockwise, it can move reversely on the lifting screw 21, further accurately control the position of the lifting screw 21, realize more accurate adjustment of the height of the beam combining device box 4.

[0034] As Figure 1 and Figure 6As shown, the flexible height adjusting device 3 further comprises an anti-top-off sheet 22 and a vertical anti-rotation stop bar 23, the anti-top-off sheet 22 is fixed outside the top end of the lifting screw 21, the anti-top-off sheet 22 can prevent the lifting screw 21 from being taken off from the top of the lifting hole during the adjustment process, ensuring the integrity and stability of the device structure, the vertical anti-rotation stop bar 23 is welded at the bottom of the front end of the anti-top-off sheet 22, and the vertical anti-rotation stop bar 23 is attached to the outer wall of the front end of the main fixed block 19, and the vertical anti-rotation stop bar 23 can prevent the lifting screw 21 from rotating in the lifting hole, when adjusting the height, the vertical anti-rotation stop bar 23 can effectively prevent the lifting screw 21 from rotating in the lifting hole, so that the lifting screw 21 can only move up and down in a straight line along the lifting hole, this design ensures the stability and accuracy of the adjustment process, avoids the deviation of the height adjustment caused by the rotation of the lifting screw 21, and ensures the reliability of the height adjustment of the beam combining device box 4, the flexible height adjusting device 3 further comprises a height scale line 24 and a height pointing mark 25, the height scale line 24 is arranged on the outer wall of the front end of the vertical anti-rotation stop bar 23, and the bottom end of the height scale line 24 is the initial end of the scale line, the height pointing mark 25 is arranged on the outer wall of the front end of the bottom of the main fixed block 19, and the sharp end of the height pointing mark 25 is aligned with the height scale line 24, when adjusting the height of the beam combining device box 4, the vertical anti-rotation stop bar 23 will also move correspondingly with the up and down movement of the lifting screw 21, the position of the height scale line 24 indicated by the height pointing mark 25 will change accordingly, the operator can observe the position of the height pointing mark 25 on the height scale line 24 to intuitively and accurately understand the height change of the beam combining device box 4, thereby realizing the precise control of the height of the beam combining device box 4, and meeting the precise requirements of the device height in different working scenarios, the flexible height adjusting device 3 realizes the flexible and precise adjustment of the height of the beam combining device box 4 through the cooperation of various components, while ensuring the stability and operability of the adjustment process, and provides strong support for the normal operation and optimized use of the entire device based on wavelength beam combining to improve the power of quantum cascade lasers.

[0035] The above description is only preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A wavelength-based beam combination device for improving the power of a quantum cascade laser, comprising a beam combination device box (4) and a top cover (5) arranged at the top end of the beam combination device box (4), the top cover (5) being fixedly connected to the beam combination device box (4) by a plurality of screws, a laser exit window (2) being arranged at the right side of the center of the front end of the beam combination device box (4), the laser exit window (2) being in communication with the inside of the beam combination device box (4), a window lens (1) being arranged inside the laser exit window (2), a laser collimator window A (6) being arranged inside the left side of the center of the rear end of the beam combination device box (4), a laser collimator window B (7) being arranged inside the right side of the center of the rear end of the beam combination device box (4), and the laser collimator window B (7) being symmetrically arranged between the laser collimator window A (6), characterized in that, The flexible height adjusting device (3) is arranged at the left and right ends of the four corners of the beam combining device box (4).

2. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 1, wherein, The flexible height adjusting device (3) on the right end outer wall of the beam combining device box (4) comprises a height fixing nut (18), a main fixing block (19), a clamping fixing nut (20) and a lifting screw rod (21), the main fixing block (19) is fixed on the right end outer wall of the beam combining device box (4), the main fixing block (19) is internally provided with a lifting hole, the lifting screw rod (21) is inserted into the lifting hole, the lifting screw rod (21) can move up and down in the lifting hole, the lifting screw rod (21) is externally threadedly connected with the height fixing nut (18) and the clamping fixing nut (20), and the height fixing nut (18) and the clamping fixing nut (20) are respectively located at the bottom and the top of the main fixing block (19).

3. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 2, wherein, The flexible height adjusting device (3) further comprises a mounting fixed bottom sheet (16) and a screw hole (17), the mounting fixed bottom sheet (16) is welded at the bottom end of the lifting screw rod (21), the mounting fixed bottom sheet (16) is internally provided with the screw hole (17) at the center of the front and rear sides, the height fixing nut (18) can be moved up and down on the outside of the lifting screw rod (21) through the thread action by rotating clockwise and counterclockwise, and the clamping fixing nut (20) can be moved up and down on the outside of the lifting screw rod (21) through the thread action by rotating clockwise and counterclockwise.

4. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 3, wherein, The flexible height adjusting device (3) further comprises an anti-falling top sheet (22) and a vertical anti-rotation stop bar (23), the anti-falling top sheet (22) is fixedly sleeved at the top end of the lifting screw rod (21), the vertical anti-rotation stop bar (23) is welded at the front end of the anti-falling top sheet (22), and the vertical anti-rotation stop bar (23) is attached to the front end outer wall of the main fixing block (19), and the vertical anti-rotation stop bar (23) can prevent the lifting screw rod (21) from rotating in the lifting hole.

5. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 4, wherein, The flexible height adjusting device (3) further comprises a height scale line (24) and a height pointing mark (25), the height scale line (24) is arranged on the front end outer wall of the vertical anti-rotation stop bar (23), the bottom end of the height scale line (24) is the initial end of the scale line, and the height pointing mark (25) is arranged on the front end outer wall of the bottom of the main fixing block (19), and the sharp end of the height pointing mark (25) is aligned with the height scale line (24).

6. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 1, wherein, The laser collimation window A (6) is provided with a collimation lens fixed plate A (8) in front, the collimation lens fixed plate A (8) is vertically fixed in the beam combining device box (4), and the collimation lens fixed plate A (8) is internally provided with a laser collimation lens A (9).

7. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 6, wherein, The collimation lens fixed plate A (8) is provided with an inclined fixed plate A (11) in front, the inclined fixed plate A (11) is internally provided with a high-reflection lens (10), the inclined fixed plate A (11) is arranged at an inclined angle of forty-five degrees from front left to rear right, and the center points of the laser collimation window A (6), the laser collimation lens A (9) and the high-reflection lens (10) coincide on the same straight line.

8. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 7, wherein, The laser collimation window B (7) is provided with a collimation lens fixing plate B (13) in front, which is vertically fixed inside the beam combination device box (4), and is provided with a laser collimation lens B (12) inside.

9. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 8, wherein, The collimation lens fixing plate B (13) is provided with an inclined fixing plate B (15) in front, which is provided with a laser beam combination dichroic lens (14) inside, and is provided at an inclined angle of forty-five degrees from front right to back left, and the center points of the laser collimation window B (7), the laser collimation lens B (12) and the laser beam combination dichroic lens (14) coincide on the same straight line.

10. The device for improving power of quantum cascade laser based on wavelength beam combining according to claim 9, wherein, The center points of the high reflection lens (10) and the laser beam combination dichroic lens (14) coincide on the same horizontal straight line, that is, the high reflection lens (10) can accurately reflect the laser beam to the laser beam combination dichroic lens (14), and the center points of the laser beam combination dichroic lens (14) and the window lens (1) coincide front and back.

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