Bonding device and method for external cavity reflector of laser light source

Abstract

The invention belongs to the technical field of precision optical manufacturing, and particularly relates to a laser light source outer cavity reflector bonding device and method. The rotating shaft assembly comprises a rotating shaft and a shaft sleeve, a rotating shaft assembly base is arranged on the base, a first groove and a second groove are formed in the rotating shaft assembly base, and the bottom surfaces of the first groove and the second groove are set as first reference surfaces; the swing rod assembly is fixedly arranged on one side of the rotating shaft assembly, the tail end of the swing rod assembly is connected with a reflective mirror, and a second datum plane matched with the reflective mirror is arranged on the base. According to the invention, the angle and distance precision of the reflector relative to the axis of the rotating shaft is directly ensured through the precision of the reference surface, and the contraction error of the glue layer is eliminated through the pressurization curing process, so that high-precision, high-repeatability, high-yield and batch production of the reflector assembly is realized; and the problem of uncertainty error caused by the clearance of the rotating shaft and the curing shrinkage of the glue in the traditional method is thoroughly solved.

Description

Technical Field

[0001] This invention belongs to the field of precision optical manufacturing technology, and specifically relates to a bonding device and method for an external cavity reflector of a laser source. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] External cavity tunable laser sources have wide applications in fields such as spectral analysis, fiber optic communication, and precision measurement due to their ability to achieve wide-range, continuous, and mode-hopping-free wavelength tuning. Their core components typically include a semiconductor laser, a blazed grating, and a mirror that can rotate around an axis. By precisely controlling the rotation angle of the mirror, the cavity length is changed, thereby achieving continuous tuning of the output wavelength.

[0004] To achieve wide-range, continuous, mode-skipping-free tuning, extremely high requirements are placed on the optical path stability of the external cavity. Specifically, the tolerance of the angle between the optical path plane formed by the light source and the mirror and the axis of rotation must be controlled within ±0.01°; simultaneously, the tolerance of the distance between the mirror surface and the axis of rotation must be less than 0.005 mm. Any error exceeding these ranges may lead to optical path detuning, causing mode hopping and disrupting wavelength continuity.

[0005] Current mirror assembly and adjustment methods employ a five-dimensional adjustment frame (or five-dimensional displacement stage) to clamp and finely adjust the spatial attitude of the mirror. This involves adjusting the outer cavity base using an optical platform as a reference; installing components such as the laser, rotating shaft, and motor; installing and adjusting the blazed grating using an assembly and adjustment device; clamping the mirror with the five-dimensional adjustment frame; monitoring the laser output status in real-time within the optical path; and repeatedly adjusting until the outer cavity emits light at the midpoint of the target wavelength range. Finally, the mirror is bonded and fixed to the rotating shaft assembly (typically including the shaft, bearings, and levers) that drives its rotation. However, the clearance in the rotating shaft assembly and the uncertainties caused by the curing shrinkage of the adhesive layer can lead to dynamic angular errors between the optical path plane and the shaft axis, as well as distance errors between the mirror surface and the shaft axis, exceeding tolerance limits during mirror rotation. These two errors are dynamic uncertainties that cannot be measured or controlled. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes a bonding device and method for a laser source external cavity reflector. By adjusting the accuracy of the device's reference surface, the angular and distance accuracy of the reflector relative to the axis of rotation is directly ensured. Pressure curing eliminates adhesive shrinkage errors, achieving high precision, high repeatability, high yield, and mass production of the reflector assembly. This completely solves the uncertainty errors caused by axis clearance and adhesive curing shrinkage in traditional methods. It ensures that the angular tolerance between the optical path plane and the axis of rotation, as well as the distance tolerance between the reflector surface and the axis of rotation, are within acceptable limits, preventing mold skipping.

[0007] According to some embodiments, the first aspect of the present invention provides a laser source external cavity reflector bonding device, which adopts the following technical solution: A laser source external cavity reflector bonding device includes a base and a rotating shaft assembly and a swing arm assembly disposed on the base. The rotating shaft assembly includes a rotating shaft and a bushing. The base is provided with a rotating shaft assembly base, and the rotating shaft assembly base is provided with a first groove and a second groove for positioning the rotating shaft. The bottom surfaces of the first groove and the second groove are both set as a first reference surface. The swing arm assembly is fixedly disposed on one side of the rotating shaft assembly, and a reflector is connected to the end of the swing arm assembly. The base is provided with a second reference surface that matches the reflector. During the bonding process between the reflector and the end of the swing arm assembly with adhesive, pressure is applied to the reflector to make the reflector adhere tightly to the second reference surface until the adhesive cures.

[0008] As a further technical limitation, a pressure plate for fixing the rotating shaft is provided on one side of both the first groove and the second groove. The pressure plate is provided with a pressure plate through hole, and the rotating shaft assembly base is provided with a rotating shaft assembly base through hole that matches the pressure plate through hole. The pressure plate is provided with a pressure plate bolt, which passes through the pressure plate through hole and connects to the rotating shaft assembly base through hole.

[0009] As a further technical limitation, the rocker arm assembly includes a first rocker arm, a second rocker arm, and a third rocker arm. The first rocker arm is fixedly connected to one side of the bushing. The first rocker arm and the third rocker arm are respectively vertically disposed at both ends of the second rocker arm. The end of the third rocker arm is set as a third reference surface, and the reflector away from the second reference surface is set as a fourth reference surface. The adhesive is applied to the fourth reference surface.

[0010] Furthermore, when the fourth reference surface coated with adhesive is overlapped and bonded to the third reference surface, pressure is continuously applied to the swing arm assembly and baked to make the reflector adhere tightly to the second reference surface until the adhesive cures.

[0011] Furthermore, during the continuous application of pressure, a pressure application mechanism is used to lock the position of the swing arm assembly and the base. The pressure application mechanism can be a mechanical clamping device, a spring loading device, or a manual pressure maintaining tool.

[0012] As a further technical limitation, the first reference surface and the second reference surface are formed by a single clamping process.

[0013] As a further technical limitation, the reflective surface of the mirror is close to the second reference surface.

[0014] According to some embodiments, the second aspect of the present invention provides a method for bonding a laser source external cavity reflector, which adopts the laser source external cavity reflector bonding device provided in the first aspect, and employs the following technical solution: A method for bonding a laser source external cavity reflector includes: The rotating shaft assembly is fixed on the first reference surface by the pressure plate, and the reflective surface of the reflector is placed on the second reference surface. Apply adhesive to the fourth reference surface, move the swing arm assembly to align the third reference surface with the fourth reference surface, and continuously apply pressure to the reflector and bake until the adhesive is cured. After the adhesive is applied, the pressure plate is released, revealing the rotating shaft assembly with the reflector attached.

[0015] As a further technical limitation, during the process of fixing the rotating shaft assembly to the first reference surface based on the pressure plate, the rotating shaft is placed in the first groove and the second groove, and the pressure plate and the base of the rotating shaft assembly are tightened by the pressure plate bolts until the rotating shaft contacts the first reference surface, thus completing the fixing of the rotating shaft assembly.

[0016] As a further technical limitation, the baking temperature is set to 120°C and the time is set to 24 hours.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves real-time monitoring of the optical path and eliminates the need for manual adjustments by operators by setting a reference surface for mirror assembly. Precise measurement and control ensure the determinism, predictability, and high repeatability of the mirror assembly results. By applying continuous pressure throughout the adhesive curing process, deformation caused by adhesive shrinkage is effectively suppressed, transforming uncertain shrinkage errors into controllable, minute changes that can be accommodated by the device's precision. This fundamentally solves the problem of uncertainties introduced by the adhesive and completely eliminates the impact of adhesive curing shrinkage. The assembly process eliminates the main sources of uncertainty, improving yield and significantly reducing production costs. It eliminates the tedious steps of repeated adjustments and real-time monitoring in the optical path, simplifying the assembly process to simple assembly, adhesive application, joining, pressurization, and curing operations, significantly improving assembly efficiency. The simple operation and standardized process greatly reduce the skill requirements for operators, enabling even those without extensive optical assembly experience to produce high-precision mirror assemblies, making it ideal for industrial mass production. Attached Figure Description

[0018] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0019] Figure 1 This is a top view of the optical path plane in an embodiment of the present invention; Figure 2 This is a schematic diagram of the shaft axis deflection in an embodiment of the present invention; Figure 3 This is a schematic diagram of the curing and shrinkage of the adhesive layer in an embodiment of the present invention; Figure 4 This is a schematic diagram of the optical path in an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the laser source external cavity reflector bonding device in an embodiment of the present invention; Figure 6 This is a schematic diagram of the base of the laser source external cavity reflector bonding device in an embodiment of the present invention; Figure 7 This is a schematic diagram of the split structure of the laser source external cavity reflector bonding device in an embodiment of the present invention; Figure 8 This is a schematic diagram of a structure of the laser source external cavity reflector bonding device in an embodiment of the present invention; Figure 9 This is another structural schematic diagram of the laser source external cavity reflector bonding device in an embodiment of the present invention; The components are as follows: 1. Base; 2. Rotating shaft assembly; 21. Rotating shaft; 22. Bushing; 23. Rotating shaft assembly base; 24. First groove; 25. Second groove; 26. Pressure plate; 27. Pressure plate through hole; 28. Rotating shaft assembly base through hole; 29. ​​Pressure plate bolt; 210. Rotating shaft axis; 3. Swing arm assembly; 31. First swing arm; 32. Second swing arm; 33. Third swing arm; 4. Reflector; 5. First reference plane; 6. Second reference plane; 7. Third reference plane; 8. Fourth reference plane; 9. Optical path plane; 10. Adhesive; 11. Light source; 12. Grating. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0024] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0025] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0026] Example 1 Embodiment 1 of the present invention introduces a bonding device for the external cavity reflector of a laser source.

[0027] External cavity tunable laser sources require a wide wavelength range with continuous, mode-skipping-free operation, and the external cavity must remain constant throughout the tuning process, such as... Figure 1 As shown, the angle α between the optical path plane formed by the light source and the reflector and the axis of rotation is within ±0.01° tolerance; Figure 2 As shown, the distance d1 between the mirror surface and the axis of rotation is required to be less than 0.005mm.

[0028] To ensure the above tolerance range, a 5-dimensional adjustment bracket can be used to clamp and adjust the reflector. However, in actual operation, the clearance in the rotating shaft assembly and the uncertainties caused by the curing shrinkage of the adhesive layer will cause the reflector to malfunction during rotation. Figure 2 The dynamic angle α error between the optical path plane and the axis of rotation shown, and as... Figure 3 The distance d1 between the reflective mirror and the axis of rotation is shown to be out of tolerance, causing mode skipping in the external cavity of the laser.

[0029] like Figure 4 As shown, the existing external cavity mainly consists of a semiconductor laser source, a blazed grating, and a mirror, with the mirror being a rotating device that rotates around a pivot axis. The existing technology has the following drawbacks: (1) Dynamic angular error introduced by the clearance of the rotating shaft assembly Slight mechanical backlash is unavoidable in rotating shaft assemblies (especially bearings). During actual operation after the reflector is bonded, this backlash causes a slight, unpredictable wobble in the reflector's optical path plane relative to the shaft axis as the shaft rotates. Figure 2 The dynamic angle error shown is difficult to predict and compensate during static assembly and adjustment, and is very likely to exceed the tolerance requirement of ±0.01°.

[0030] (2) Distance error introduced by adhesive layer curing shrinkage The adhesives used to bond the reflector and the swing arm (such as UV glue, epoxy resin, etc.) undergo volume shrinkage during the curing process. This shrinkage is uneven and difficult to control precisely, leading to issues such as… Figure 3 The distance d1 between the adjusted mirror surface and the axis of rotation has changed, causing it to deviate from the ideal position and exceed the tolerance range of 0.005mm.

[0031] (3) Low yield and high cost The two types of uncertainties mentioned above are random and dynamic, and cannot be directly measured or effectively controlled during the assembly and adjustment process. This results in a low yield of the assembled and adjusted reflector assembly, with a large number of components being scrapped because they cannot meet the requirements for no mold skipping, significantly increasing the overall cost of the product.

[0032] (4) The assembly and adjustment process is complex and highly dependent on personnel. Current technology requires real-time monitoring and feedback adjustment of the reflector's attitude using high-precision instruments (such as a spectrometer) within a complete optical path environment. This process is extremely cumbersome, time-consuming, and demands exceptionally high levels of skill and experience from operators, making standardization and mass production difficult.

[0033] This embodiment describes a method such as Figure 5 , Figure 6 and Figure 7 The laser source external cavity reflector bonding device shown includes a base 1, a rotating shaft assembly 2, and a swing arm assembly 3 (not labeled in the figure). The rotating shaft assembly 2 includes a rotating shaft 21 and a bushing 22. The base 1 is provided with a rotating shaft assembly base 23, which is provided with a first groove 24 and a second groove 25 for positioning the rotating shaft 21. The bottom surfaces of the first groove 24 and the second groove 25 are both set as a first reference surface 5. The swing arm assembly 3 is fixedly disposed on one side of the rotating shaft assembly 2. The end of the swing arm assembly 3 is connected to a reflector 4. The base 4 is provided with a second reference surface 6 that matches the reflector 4. During the bonding process between the reflector 4 and the end of the swing arm assembly 3 with adhesive 10, pressure is applied to the reflector 4 to make the reflector 4 adhere tightly to the second reference surface 6 until the adhesive 10 cures.

[0034] As one or more embodiments, a pressure plate 26 for fixing the rotating shaft 21 is provided on one side of the first groove 24 and the second groove 25. The pressure plate 26 is provided with a pressure plate through hole 27 (not shown in the figure). The rotating shaft assembly base 23 is provided with a rotating shaft assembly base through hole 28 that matches the pressure plate through hole 27. The pressure plate 26 is provided with a pressure plate bolt 29. The pressure plate bolt 29 passes through the pressure plate through hole 27 and is connected to the rotating shaft assembly base through hole 28.

[0035] In this embodiment, the swing arm assembly 3 includes a first swing arm 31, a second swing arm 32, and a third swing arm 33. The first swing arm 31 is fixedly connected to one side of the bushing 22. The first swing arm 31 and the third swing arm 33 are respectively vertically arranged at both ends of the second swing arm 32. The third swing arm 33 has a cylindrical structure and its end is set as a third reference surface 7. The reflector 4, which is away from the second reference surface 6, is set as a fourth reference surface 8. Adhesive 10 is applied to the fourth reference surface 8. When the fourth reference surface 8 with adhesive 10 is overlapped and bonded to the third reference surface 7, pressure is continuously applied to the swing arm assembly 3 and baked to make the reflector 4 stick tightly to the second reference surface 6 until the adhesive is cured.

[0036] It should be noted that during the continuous application of pressure, a pressure application mechanism is used to lock the position of the swing arm assembly 3 and the base 1. The pressure application mechanism can be a mechanical clamping device, a spring loading device, or a manual pressure maintaining tool. In this embodiment, the swing arm assembly 3 is continuously pressed downward for 10 minutes, and then the device is placed in a 120°C oven for 24 hours to allow the adhesive to fully cure, thus avoiding the impact of adhesive curing shrinkage on the accuracy of the reflector assembly.

[0037] It should be noted that the first reference surface 5 and the second reference surface 6 are formed by a single clamping process; the reflective surface of the reflector 4 is close to the second reference surface 6.

[0038] In this embodiment, the second reference surface 6 is designed to completely overlap with the reflective surface of the reflector 4 during bonding (i.e., the reflective surface is placed directly on the second reference surface 6). The parallelism and height difference (which determines the distance d1) between the first reference surface 5 and the second reference surface 6 are key accuracy indicators of the device. By clamping the first reference surface 5 and the second reference surface 6 simultaneously on an ultra-high precision machine tool, milling or grinding can be performed, ensuring that the parallelism error between them is much less than ±0.01° and the height difference error is much less than 0.005mm. The area of ​​the second reference surface 6 can be slightly smaller than the reflective surface of the reflector 4 for easy handling.

[0039] The specific bonding process in this embodiment is as follows: (1) Place the base 1 securely on the operating table; (2) Place the assembled shaft assembly 2 into the first groove 24 and the second groove 25 of the base 1 to ensure that the bushing 22, the shaft 21 and the first reference surface 5 are in good contact; (3) Install the pressure plate 26 and tighten the pressure plate bolts 29 to fully press and fix the rotating shaft assembly 2; (4) Take a clean reflector 4, with its reflective surface facing down, and gently place it on the second reference surface 5 of the base 1. At this time, the mirror position of the reflector 4 has been precisely set. (5) Apply an appropriate amount of acrylic double-tube adhesive (or other suitable precision adhesive) evenly to the back bonding surface of the reflector 4. (6) Slowly rotate the shaft 21, causing the swing arm assembly 3 to rotate downwards until the third reference surface 7 contacts the fourth reference surface 8, and the adhesive is slightly squeezed to form a uniform adhesive layer. At this time, the device is in the position of Figure 8 The closed state shown; (7) Apply a vertically downward pressure to the swing arm assembly 3 by means of a pressure application mechanism or manual operation by the operator, so that the reflector 4 is always in close contact with the second reference surface 6, and maintain this pressure for about 10-30 minutes until the adhesive is initially cured; (8) Move the entire device (while still closed, or lock the pressure mechanism if possible) into an oven preheated to 120°C and bake for 24 hours to allow the adhesive to fully cure. (9) After curing, remove the device and allow it to cool to room temperature. Release the pressure and rotate the shaft 2 in the opposite direction to lift the swing arm assembly 3, which carries the firmly bonded reflector 4. Figure 9 As shown, loosen the pressure plate bolt 29 of the pressure plate 26 to remove the glued reflector 4 from the base 1.

[0040] This embodiment achieves real-time monitoring of the optical path and eliminates the need for manual adjustments by operators by setting a reference surface for mirror assembly. Precise measurement and control ensure the determinism, predictability, and high repeatability of the mirror assembly results. By applying continuous pressure throughout the adhesive curing process, deformation caused by adhesive shrinkage is effectively suppressed, transforming uncertain shrinkage errors into controllable, minute changes that can be accommodated by the device's precision. This fundamentally solves the problem of uncertainties introduced by the adhesive and completely eliminates the impact of adhesive curing shrinkage. The assembly process eliminates the main sources of uncertainty, improving yield and significantly reducing production costs. It eliminates the tedious steps of repeated adjustments and real-time monitoring in the optical path, simplifying the assembly process to simple assembly, adhesive application, joining, pressurization, and curing operations, significantly improving efficiency. The simple operation and standardized process greatly reduce the skill requirements for operators, enabling even those without extensive optical assembly experience to produce high-precision mirror assemblies, making it ideal for industrial mass production.

[0041] Example 2 Embodiment 2 of the present invention introduces a method for bonding a laser source external cavity reflector, which adopts the laser source external cavity reflector bonding device provided in Embodiment 1.

[0042] A method for bonding a laser source external cavity reflector includes: The rotating shaft assembly is fixed on the first reference surface by the pressure plate, and the reflective surface of the reflector is placed on the second reference surface. Apply adhesive to the fourth reference surface, move the swing arm assembly to align the third reference surface with the fourth reference surface, and continuously apply pressure to the reflector and bake until the adhesive is cured. After the adhesive is applied, the pressure plate is released, revealing the rotating shaft assembly with the reflector attached.

[0043] As one or more embodiments, during the process of fixing the rotating shaft assembly to the first reference surface based on the pressure plate, the rotating shaft is placed in the first groove and the second groove, and the pressure plate and the base of the rotating shaft assembly are tightened by the pressure plate bolts until the rotating shaft contacts the first reference surface, thus completing the fixing of the rotating shaft assembly.

[0044] As one or more embodiments, the baking temperature is set to 120°C and the time is set to 24 hours.

[0045] The detailed steps are the same as the working principle of the laser source external cavity reflector bonding device provided in Example 1, and will not be repeated here.

[0046] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0047] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A bonding device for an external cavity reflector of a laser light source, characterized in that, The device includes a base and a pivot assembly and a swing arm assembly mounted on the base. The pivot assembly includes a pivot and a bushing. The base has a pivot assembly base with a first groove and a second groove for positioning the pivot. The bottom surfaces of the first groove and the second groove are both set as first reference surfaces. The swing arm assembly is fixedly mounted on one side of the pivot assembly. A reflector is connected to the end of the swing arm assembly. The base has a second reference surface that matches the reflector. During the process of bonding the reflector to the end of the swing arm assembly with adhesive, pressure is applied to the reflector to make it adhere tightly to the second reference surface until the adhesive cures.

2. The laser source external cavity reflector bonding device as described in claim 1, characterized in that, Both the first groove and the second groove have a pressure plate for fixing the rotating shaft on one side. The pressure plate has a pressure plate through hole. The rotating shaft assembly base has a rotating shaft assembly base through hole that matches the pressure plate through hole. The pressure plate has a pressure plate bolt that passes through the pressure plate through hole and connects to the rotating shaft assembly base through hole.

3. The laser source external cavity reflector bonding device as described in claim 1, characterized in that, The rocker arm assembly includes a first rocker arm, a second rocker arm, and a third rocker arm. The first rocker arm is fixedly connected to one side of the bushing. The first rocker arm and the third rocker arm are respectively vertically arranged at both ends of the second rocker arm. The end of the third rocker arm is set as a third reference surface, and the reflector away from the second reference surface is set as a fourth reference surface. The adhesive is applied to the fourth reference surface.

4. The laser source external cavity reflector bonding device as described in claim 3, characterized in that, When the fourth reference surface coated with adhesive is overlapped and bonded to the third reference surface, pressure is continuously applied to the swing arm assembly and baked to make the reflector adhere tightly to the second reference surface until the adhesive is cured.

5. The laser source external cavity reflector bonding device as described in claim 4, characterized in that, During the continuous application of pressure, a pressure application mechanism is used to lock the position of the swing arm assembly and the base. The pressure application mechanism can be a mechanical clamping device, a spring loading device, or a manual pressure maintaining tool.

6. The laser source external cavity reflector bonding device as described in claim 1, characterized in that, The first reference surface and the second reference surface are formed by a single clamping process.

7. The laser source external cavity reflector bonding device as described in claim 1, characterized in that, The reflective surface of the mirror is close to the second reference surface.

8. A method for bonding a laser source external cavity reflector, comprising the laser source external cavity reflector bonding device as described in any one of claims 1-7, characterized in that, include: The rotating shaft assembly is fixed on the first reference surface by the pressure plate, and the reflective surface of the reflector is placed on the second reference surface. Apply adhesive to the fourth reference surface, move the swing arm assembly to align the third reference surface with the fourth reference surface, and continuously apply pressure to the reflector and bake until the adhesive is cured. After the adhesive is applied, the pressure plate is released, revealing the rotating shaft assembly with the reflector attached.

9. The method for bonding a laser source external cavity reflector as described in claim 8, characterized in that, During the process of fixing the rotating shaft assembly to the first reference surface based on the pressure plate, the rotating shaft is placed in the first groove and the second groove, and the pressure plate and the base of the rotating shaft assembly are tightened by the pressure plate bolts until the rotating shaft contacts the first reference surface, thus completing the fixing of the rotating shaft assembly.

10. The method for bonding a laser source external cavity reflector as described in claim 8, characterized in that, The baking temperature was set to 120°C and the baking time was set to 24 hours.

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