Fiber coupled laser diode module

Abstract

The application relates to a fiber-coupled laser tube module, which comprises a laser tube assembly, a coupling filter device, a pigtail, a pigtail fixing sheet, an adjusting bolt, a base and a support frame. The structure provided by the application can make reflected light completely separate from the internal space of the fiber-coupled laser tube module, eliminate the interference of reflected light on the end face of the fiber on the laser tube assembly, and set a filtering structure and function, so that a more stable and purer laser light source can be obtained.

Description

Technical Field

[0001] The present invention belongs to the field of lasers and optical fiber couplers, and in particular relates to an optical fiber coupled laser tube module. Background Art

[0002] A traditional fiber-coupled laser tube module combines a fiber pigtail, a coupling lens, and a laser tube assembly. Its function is to couple the laser light generated by the laser tube assembly into an optical fiber and output it through the pigtail. It is widely used in fields such as optical communications, laser measurement, and chemical analysis. While this module offers advantages such as compactness and high coupling efficiency, its disadvantages are its inability to effectively prevent reflected light from entering the laser tube assembly and thus interfering with the laser's output. Furthermore, its lack of filtering functionality limits its further application and development. Addressing the issue of laser light reflected off the optical axis at the fiber end face in this module prevents reflected light from entering the laser tube assembly, thereby stabilizing the laser tube assembly's output. Furthermore, incorporating a filtering structure into this device to remove stray light from the laser tube assembly can achieve a purer laser output. Currently, effective methods for preventing reflected light from entering the laser tube assembly include deflecting the reflected light off the optical axis. These methods include: positioning the fiber at a certain angle to the optical axis; polishing the fiber end face at a certain angle to the radial direction; positioning the laser tube assembly at a certain angle to the optical axis; and positioning the coupling lens at a certain angle to the radial direction. Existing patents all employ one or a combination of the aforementioned methods to deflect the reflected light from the fiber end face off the optical axis. However, these methods fail to completely deflect the reflected light from the cavity between the fiber and the laser tube assembly, resulting in multiple reflections within the cavity and increasing the probability of interference with the laser tube assembly. Furthermore, none of the existing devices involve filtering structures or functions. For example, a semiconductor laser and optical fiber coupling system (COUPLING SYSTEM OF SEMICONDUCTOR LASER AND OPTICAL FIBER, JP58132709A, HIRAMARIKA KENKYUSHO KK, 1982-02-02) employs a method of placing the optical fiber at a specific angle to the optical axis to deflect the reflected light. The angle of deviation is the same as the angle at which the fiber is positioned. However, if the angle is too small, the reflected light will deviate too little, allowing it to pass through the coupling lens and enter the laser tube assembly. If the angle is too large, the angle between the incident light and the fiber's radial direction will be too large, severely affecting coupling efficiency. Therefore, this invention cannot simultaneously completely eliminate reflected light and ensure high coupling efficiency. Summary of the Invention

[0003] In view of the above problems and in order to improve the deficiencies of the prior art, the present invention provides a new type of fiber-coupled laser tube module, which can obtain a more stable and pure laser output than the traditional fiber-coupled laser tube module. By setting the angle between the fiber end face and the radial direction to 6-10°, and providing a light-blocking pressure ring behind the coupling lens, the reflected light from the fiber end face is deflected twice and then leaves the cavity, completely isolating the interference of the reflected light from the fiber end face; by providing a laser purification filter in front of the coupling lens, the light beam emitted by the laser tube assembly is filtered, so that the stray light of the laser tube assembly is effectively filtered out, and a pure laser output is obtained. The structure of this device is simple, and the volume is not significantly increased compared to the traditional structure. It effectively solves the problem of reflected light interference of the traditional fiber-coupled laser tube module, and provides a filtering structure and function, which is an innovation and improvement of the existing structure.

[0004] The technical solution of the present invention is:

[0005] A fiber-coupled laser tube module comprises a laser tube assembly, a coupling filter device, a pigtail, a pigtail fixing plate, a base, an adjustment mechanism, and a fixing mechanism. The coupling filter device comprises a laser purification filter, an aluminum alloy backing ring, a coupling lens, a light-blocking pressure ring, and a lens base. The laser purification filter, the aluminum alloy backing ring, the coupling lens, and the light-blocking pressure ring are sequentially placed at the bottom of the lens base. The coupling filter device and the laser tube assembly are sequentially placed within the base, with the head of the laser tube assembly in contact with the bottom of the coupling filter device. The head of the laser tube assembly is fixed by an adjustment mechanism, and the tail of the laser tube assembly is fixed by a fixing mechanism.

[0006] The outer side of the end face of the pigtail is a metal protective shell, which is placed parallel to the optical axis and is adjusted and fixed by the adjustment mechanism on the base; the end face of the metal protective shell has a preset angle with the radial direction; the metal protective shell of the pigtail passes through the pigtail fixing plate and is fixed thereon, the pigtail fixing plate is in contact with the outer surface of the base, the pigtail fixing plate is provided with a center hole, and the pigtail fixing plate is provided with a hollow structure;

[0007] The excitation filter is used to first filter the laser emitted by the laser tube assembly, and the coupling lens is used to converge the filtered laser onto the end face of the optical fiber; the reflected light from the end face of the optical fiber is deflected at a preset angle between the end face of the metal protective shell and the radial direction and then irradiated onto the outer surface of the light-blocking pressure ring, and the light-blocking pressure ring is used to reflect the reflected light again and emit it through the hollow structure of the fiber pigtail fixing plate.

[0008] Furthermore, the lens base is a cylindrical structure with an internal hollowed-out structure of varying diameters along the axial direction. The diameter of the bottom circular hole is 6-8 mm, the diameter of the middle circular hole is 9-11 mm, and the diameter of the top threaded circular hole is 12-15 mm.

[0009] Furthermore, the laser purification filter has the same central wavelength as the laser tube assembly, and the half-wave bandwidth is 2-20nm; the coupling lens has a diameter of 10mm, a numerical aperture of 0.3-0.7, and at least one surface is coated with an optical anti-reflection film, and the anti-reflection band includes the central wavelength of the laser tube assembly; the light-blocking pressure ring is connected to the lens base through a thread on one side, and applies force to the coupling lens, aluminum alloy gasket and laser purification filter; the other side of the light-blocking pressure ring is a ring structure with an inner diameter of 3-6mm; the surfaces of the light-blocking pressure ring, lens base and aluminum alloy gasket are all coated with light-absorbing material or treated into a light-absorbing layer.

[0010] Furthermore, the center of the pigtail fixing piece is a circular hole, and is provided with a fan-shaped hollowing of 60°-90°.

[0011] Furthermore, the pigtail comprises 1-200 optical fibers, made of quartz or PMMA, with a core diameter of 0.05-2 mm and a length of 0.1-200 m.

[0012] Furthermore, the base is made of aluminum alloy, and the inner surface is coated with light-absorbing material or processed into a light-absorbing layer; one side of the base is hollowed out in a trumpet shape to allow the reflected light to be completely emitted; the other side of the base is hollowed out in a cylindrical shape for placing the coupling filter device and the laser tube assembly; the adjustment mechanism includes an adjusting bolt, and the base is provided with a threaded hole for placing the adjusting bolt.

[0013] Furthermore, four holes are provided on the four feet of the base for fixing the base to an optical plate or a workbench.

[0014] Furthermore, the fixing mechanism includes a support frame, which has 7 threaded holes, 5 of which are used to place the adjustment bolts, and the other 2 are used to fix the support frame to the optical plate or workbench; the adjustment bolts are made of stainless steel, with a thread diameter of 2.5mm and a length of 2-15mm.

[0015] Furthermore, the laser tube assembly has a diameter of 15-20 mm, a length of 40-100 mm, an optical power of 0.5-500 mW, a central wavelength of 300-900 nm, a half-wave bandwidth of 2-10 nm, and a beam diameter of 0.8-8 mm.

[0016] Furthermore, the angle between the end face of the metal protective shell and the radial direction is set to 6-10 degrees; the reflected light from the end face of the optical fiber is deflected by 12-20 degrees and then irradiated onto the outer surface of the light-blocking pressure ring.

[0017] Compared with the prior art, the filter spectrum detection device of the present invention has the following advantages:

[0018] 1. Conventional fiber-coupled laser tube modules lack structures and functions for processing reflected light, or they fail to completely separate reflected light from the fiber end face from the internal cavity, preventing it from entering the laser tube assembly and potentially interfering with it. The structure provided by the present invention completely separates reflected light from the fiber end face from the module's internal space, completely eliminating any interference with the laser tube assembly. This invention achieves more stable laser output than conventional fiber-coupled laser tube modules.

[0019] 2. Existing fiber-coupled laser tube modules lack a filtering structure or function, resulting in laser light containing significant stray light. The structure provided by the present invention incorporates an internal filtering device, adding filtering functionality without significantly increasing the size. This invention can produce a purer laser output than existing fiber-coupled laser tube modules.

[0020] 3. Existing fiber-coupled laser tube modules have extremely high requirements for machining precision and lack adjustment capabilities, or adjustment is very difficult, which increases the assembly cost of the module. The present invention uses adjustment bolts for adjustment and fixation, greatly reducing the machining precision requirements for each component, lowering costs and making assembly more convenient.

[0021] In summary, the application of the technical solution of the present invention can solve the problem that the existing fiber-coupled laser tube module cannot effectively isolate the interference of reflected light, and the problem that the output light of the existing fiber-coupled laser tube module contains a large amount of stray light.

[0022] Based on the above reasons, the present invention can be widely promoted in the fields of optical communication, laser measurement and chemical analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the internal structure of a fiber-coupled laser tube module. In the figure: 1 - laser tube assembly; 2 - coupling filter; 3 - pigtail; 4 - pigtail fixing plate; 5 - adjustment bolt; 6 - base; 7 - support frame; 8 - laser purification filter; 9 - aluminum alloy gasket; 10 - coupling lens; 11 - light-blocking pressure ring; 12 - lens base; 13 - metal protective shell.

[0024] Figure 2 This is a schematic diagram of the pigtail fixing plate structure, where the left picture is the main view and the right picture is the side view.

[0025] Figure 3 This is a test spectrum of the optical power of the fiber-coupled laser tube module described in Example 1: the left figure shows the result without using the patented structure, and the right figure shows the result with using the patented structure. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] A fiber-coupled laser tube module comprises a laser tube assembly 1, a coupling filter device 2, a pigtail 3, a pigtail fixing plate 4, an adjusting bolt 5, a base 6 and a support frame 7; the characteristic is that the coupling filter device 2 comprises a laser purification filter 8, an aluminum alloy gasket 9, a coupling lens 10, a light-blocking pressure ring 11 and a lens base 12; the lens base 12 is a cylindrical structure with an internal hollowing with a variable diameter along the axial direction, a bottom circular hole with a diameter of 6-8 mm, a middle circular hole with a diameter of 9-11 mm, and a top threaded circular hole with a diameter of 12-15 mm; the laser purification filter 8, the aluminum alloy gasket 9, the coupling lens 10 and the light-blocking pressure ring 11 are placed in sequence at the bottom of the lens base 12; the coupling filter device 2 and the head of the laser tube assembly 1 are placed in sequence inside the base 6, and the head of the laser tube assembly 1 is in contact with the bottom of the coupling filter device 2; the head of the laser tube assembly 1 is fixed by the adjusting bolt 5 on the base 6, and the tail of the laser tube assembly 1 is fixed by the support frame 7;

[0030] The outer side of the end face of the pigtail 3 is a metal protective shell 13, which is placed parallel to the optical axis and is adjusted and fixed by the adjusting bolt 5 on the base 6; the angle between the end face of the metal protective shell (13) and the radial direction is set to 6-10°; the center of the pigtail fixing plate 4 is a circular hole, and a fan-shaped hollow with a central angle of 45°-90° is provided. In this embodiment, the hollow shape is a fan ring, and the short arc edge of the fan ring is 3-8mm away from the center of the circular hole; the metal protective shell 13 of the pigtail 3 passes through the pigtail fixing plate 4 and is fixed by glue;

[0031] One side of the pigtail fixing plate 4 is in contact with the outer surface of the base 6 and is fixed to the base 6 by glue; the laser emitted by the laser tube assembly 1 is first filtered by the excitation filter 8 in the coupling filter device 2, and then converged onto the optical fiber end face in front through the coupling lens 10; the reflected light from the optical fiber end face is deflected by 12-20° and irradiated onto the outer surface of the light-blocking pressure ring 11, and is reflected again and emitted through the fan-shaped hollow of the pigtail fixing plate 4.

[0032] Preferably, the laser purification filter 8 has the same central wavelength as the laser tube assembly 1, and the half-wave bandwidth is 2-20nm; the coupling lens 10 has a diameter of 10mm, a numerical aperture of 0.3-0.7, and at least one surface is coated with an optical anti-reflection film, and the anti-reflection band includes the central wavelength of the laser tube assembly 1; the light-blocking pressure ring 11 is connected to the lens base 12 through a thread on one side, and applies force to the coupling lens 10, the aluminum alloy gasket 9 and the laser purification filter 8; the other side of the light-blocking pressure ring 11 is a ring structure with an inner diameter of 3-6mm; the surfaces of the light-blocking pressure ring 11, the lens base 12 and the aluminum alloy gasket 9 are all coated with light-absorbing materials or treated into light-absorbing layers.

[0033] Preferably, the center of the pigtail fixing piece 4 is a circular hole, and is provided with a fan-shaped hollowing of 60°-90°.

[0034] Preferably, the pigtail 3 includes 1-200 optical fibers, made of quartz or PMMA (polymethyl methacrylate / organic glass), with a core diameter of 0.05-2 mm and a length of 0.1-200 m.

[0035] Preferably, the base 6 is made of aluminum alloy, and the inner surface is coated with a light-absorbing material or treated into a light-absorbing layer; one side of the base 6 is hollowed out in a trumpet shape to allow the reflected light to be completely emitted; the other side of the base 6 is hollowed out in a cylindrical shape for placing the coupling filter device 2 and the laser tube assembly 1; the base 6 is provided with 6 threaded holes for placing the adjusting bolts 5; the four feet of the base 6 are provided with 4 holes for fixing the base 6 to an optical plate or a workbench.

[0036] Preferably, the support frame has seven threaded holes, five of which are used to place the adjusting bolts 5 , and the other two are used to fix the support frame 7 to the optical plate or workbench.

[0037] Preferably, the laser tube assembly 1 has a diameter of 15-20 mm, a length of 40-100 mm, an optical power of 0.5-500 mW, a central wavelength of 300-900 nm, a half-wave bandwidth of 2-10 nm, and a beam diameter of 0.8-8 mm.

[0038] Preferably, the adjusting bolt 5 is made of stainless steel, with a thread diameter of 2.5 mm and a length of 2-15 mm.

[0039] Example 1

[0040] A fiber-coupled laser tube module, such as Figure 1 As shown, it includes a laser tube assembly 1, a coupling filter device 2, a pigtail 3, a pigtail fixing plate 4, an adjusting bolt 5, a base 6, and a support frame 7. The coupling filter device 2 includes a laser purification filter 8, an aluminum alloy gasket 9, a coupling lens 10, a light-blocking pressure ring 11, and a lens base 12. The lens base 12 is a cylindrical structure with an axially variable diameter hollowed out interior. The bottom center has a 6mm diameter circular hole, the middle has a 10mm diameter circular hole, and the top has a 12mm diameter threaded circular hole. The laser purification filter 8, the aluminum alloy gasket 9, the coupling lens 10, and the light-blocking pressure ring 11 are placed in sequence at the bottom of the lens base. The coupling filter device 2 and the head of the laser tube assembly 1 are placed in sequence inside the base 6, with the head of the laser tube assembly 1 in contact with the bottom of the coupling filter device 2. In this embodiment, a heat sink is also provided within the laser tube assembly 1. The head of the laser tube assembly 1 is secured by the adjusting bolt 5 on the base 6, and the tail of the laser tube assembly 1 is secured by the support frame 7. A quartz optical fiber with a core diameter of 0.4 mm and a length of 0.1 m is used as the pigtail 3. The outer metal protective shell 13 of the end face of the pigtail 3 is made of stainless steel. The angle between the end face of the pigtail 3 and the radial direction is set to 8°. The metal protective shell 13 is placed parallel to the optical axis and is squeezed and fixed by the adjusting bolt 5 on the base 6. Figure 2As shown, the center of the pigtail fixing plate 4 is a circular hole, and a 90° fan-shaped hollow is provided; the metal protective shell 13 of the pigtail 3 passes through the circular hole in the center of the pigtail fixing plate 4 and is fixed by epoxy resin glue; one side of the pigtail fixing plate 4 is in contact with the outer surface of the base 6 and is glued to the base 6 by epoxy resin glue. A laser tube assembly 1 with a central wavelength of 785nm is used, with a diameter of 16mm, a length of 60mm, a luminous power of 35mW, a half-wave bandwidth of 2nm, a beam diameter of 3mm, and a divergence angle of 50mrad. A laser purification filter 8 with a central wavelength of 785nm and a half-wave bandwidth of 5nm is used; an aspheric convex lens with a numerical aperture of 0.6 is used as the coupling lens 10, and both surfaces are coated with an optical anti-reflection film, and the anti-reflection band is 600-900nm. An aluminum alloy gasket 9 is used to isolate the laser purification filter 8 and the aspheric convex lens 10; the threaded end of the light-blocking pressure ring 11 is used to fix the coupling lens 10, the aluminum alloy gasket 9 and the laser purification filter 8, and the other end is a ring structure with an inner diameter of 5mm, so that the incident light passes through the 5mm hole and converges to the 8° end face of the optical fiber, so that the reflected light is deflected by 16° and then irradiated on the outer surface of the light-blocking pressure ring 11 for secondary reflection, and then emitted through the 90° hollow of the pigtail fixing plate 4. The surfaces of the base 6, the light-blocking pressure ring 11, the lens base 12 and the aluminum alloy gasket 9 are anodized to black. Figure 3 As shown, the output power fluctuation of the fiber-coupled laser tube module using the traditional structure is 3-5% (peak-peak); using this patented structure to process the reflected light, the fluctuation can be reduced to less than 1% (peak-peak).

[0041] Example 2

[0042] The fiber-coupled laser tube module described in Example 1 differs in that: a quartz optical fiber with a core diameter of 0.8 mm and a length of 0.1 m is used as the pigtail 3, and the angle between the end face of the pigtail 3 and the radial direction is set to 10°. A laser tube assembly 1 with a central wavelength of 450 nm is used, with a diameter of 16 mm, a length of 60 mm, a luminous power of 35 mW, a half-wave bandwidth of 2 nm, a beam diameter of 3 mm, and a divergence angle of 50 mrad. A laser purification filter 8 with a central wavelength of 450 nm and a half-wave bandwidth of 5 nm is used. An aspheric convex lens is used as the coupling lens 10, with both surfaces coated with an optical anti-reflection film, and the anti-reflection band is 300-600 nm. The optical power fluctuation of the fiber-coupled laser tube module using the traditional structure is 3-5% (peak-peak); using the structure of this patent to process the reflected light, the fluctuation can be reduced to less than 1% (peak-peak).

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fiber-coupled laser tube module, characterized by: It comprises a laser tube assembly (1), a coupling filter device (2), a pigtail (3), a pigtail fixing plate (4), a base (6), an adjustment mechanism, and a fixing mechanism; the coupling filter device (2) comprises a laser purification filter (8), an aluminum alloy gasket (9), a coupling lens (10), a light-blocking pressure ring (11), and a lens base (12); the laser purification filter (8), the aluminum alloy gasket (9), the coupling lens (10), and the light-blocking pressure ring (11) are placed in sequence on the bottom of the lens base (12); the coupling filter device (2) and the laser tube assembly (1) are placed in sequence inside the base (6), and the head of the laser tube assembly (1) is in contact with the bottom of the coupling filter device (2); the head of the laser tube assembly (1) is fixed by the adjustment mechanism, and the tail of the laser tube assembly (1) is fixed by the fixing mechanism; The outer side of the end face of the pigtail (3) is a metal protective shell (13), which is placed parallel to the optical axis and is adjusted and fixed by the adjustment mechanism on the base (6); the end face of the metal protective shell (13) has a preset angle with the radial direction; the metal protective shell (13) of the pigtail (3) passes through the pigtail fixing plate (4) and is fixed thereon, the pigtail fixing plate (4) is fitted with the outer surface of the base (6), the pigtail fixing plate (4) is provided with a center hole, and the pigtail fixing plate (4) is provided with a hollow structure; The laser purification filter (8) is used to filter the laser emitted by the laser tube assembly (1), and the coupling lens (10) is used to converge the filtered laser onto the end face of the optical fiber; the reflected light from the end face of the optical fiber is deflected at a preset angle between the end face of the metal protective shell (13) and the radial direction and then irradiated onto the outer surface of the light-blocking pressure ring (11), and the light-blocking pressure ring (11) is used to reflect the reflected light again and emit it through the hollow structure of the pigtail fixing plate (4).

2. The fiber-coupled laser tube module according to claim 1, characterized in that: The lens base (12) is a cylindrical structure, with an internal hollowing process of varying diameters along the axial direction, a bottom circular hole having a diameter of 6-8 mm, a middle circular hole having a diameter of 9-11 mm, and a top threaded circular hole having a diameter of 12-15 mm.

3. The fiber-coupled laser tube module according to claim 1, wherein: The laser purification filter (8) has the same central wavelength as the laser tube assembly (1), and a half-wave bandwidth of 2-20 nm; the coupling lens (10) has a diameter of 10 mm, a numerical aperture of 0.3-0.7, and at least one surface is coated with an optical anti-reflection film, and the anti-reflection band includes the central wavelength of the laser tube assembly (1); the light-blocking pressure ring (11) is connected to the lens base (12) through a thread on one side, and applies a force to the coupling lens (10), the aluminum alloy gasket (9) and the laser purification filter (8); the other side of the light-blocking pressure ring (11) is a ring structure with an inner diameter of 3-6 mm; the surfaces of the lens base (12) and the aluminum alloy gasket (9) are coated with light-absorbing materials or processed into light-absorbing layers.

4. The fiber-coupled laser tube module according to claim 1, characterized in that: The center of the pigtail fixing plate (4) is a circular hole, and is provided with a fan-shaped hollowing of 60°-90°.

5. The fiber-coupled laser tube module according to claim 1, characterized in that: The pigtail (3) comprises 1-200 optical fibers, the materials of which include quartz and PMMA, with a core diameter of 0.05-2 mm and a length of 0.1-200 m.

6. The fiber-coupled laser tube module according to claim 1, characterized in that: The base (6) is made of aluminum alloy, and the inner surface is coated with a light-absorbing material or processed into a light-absorbing layer; one side of the base (6) is hollowed out in a trumpet shape to allow the reflected light to be completely emitted; the other side of the base (6) is hollowed out in a cylindrical shape for placing the coupling filter device (2) and the laser tube assembly (1); the adjustment mechanism includes an adjustment bolt (5), and the base (6) is provided with a threaded hole for placing the adjustment bolt (5).

7. The fiber-coupled laser tube module according to claim 6, characterized in that: Four holes are provided on the four bottom feet of the base (6) for fixing the base (6) to an optical plate or a workbench.

8. The fiber-coupled laser tube module according to claim 7, characterized in that: The fixing mechanism comprises a support frame (7), which has seven threaded holes, five of which are used to place the adjusting bolts (5), and the other two are used to fix the support frame (7) to the optical plate or workbench; the adjusting bolts (5) are made of stainless steel, have a thread diameter of 2.5 mm, and a length of 2-15 mm.

9. The fiber-coupled laser tube module according to claim 1, characterized in that: The laser tube assembly (1) has a diameter of 15-20 mm, a length of 40-100 mm, an optical power of 0.5-500 mW, a central wavelength of 300-900 nm, a half-wave bandwidth of 2-10 nm, and a beam diameter of 0.8-8 mm.

10. The fiber-coupled laser tube module according to claim 1, characterized in that: The angle between the end face of the metal protective shell (13) and the radial direction is set to 6-10 degrees; the reflected light from the end face of the optical fiber is deflected by 12-20 degrees and then irradiated onto the outer surface of the light-blocking pressure ring (11).

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