Laser fiber coupling adjusting device

Abstract

The utility model discloses a laser fiber coupling adjusting device comprising a support, and the center of the support is provided with a through hole; the light-emitting unit is used for emitting laser; the light-emitting unit is embedded into one end of the through hole; the end part of one side of the optical fiber mounting body is of a columnar structure; the adjusting assembly comprises an adapter ring and a hollow metal ball; the adapter ring is in sliding fit with one end face of the support. The hollow metal ball is used for being in running fit with the adapter ring; the end part of the optical fiber mounting body is inserted into the columnar space in the hollow metal ball, and the optical fiber mounting body is arranged in the columnar space in a sliding manner. According to the device, the adjustable degree of freedom can be effectively increased, alignment adjustment between the optical fiber and laser can be achieved, after position adjustment is determined, the adjusting assemblies are fixedly connected in a welding mode, the displacement situation before and after curing can be effectively improved, the product stability is effectively improved, and the product temperature adaptability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser optical fiber coupling, in particular to a laser optical fiber coupling regulating device. Background Art

[0002] Optical precision adjustment is often used in optical products in the fields of fiber optics, industrial lasers, biomedicine, etc. Due to the limitation of processing accuracy, in order to ensure that the product achieves higher coupling efficiency or collimation or concentricity and other indicators, it often relies on multi-dimensional adjustment of key components to compensate for the errors caused by processing and assembly, so that the system can meet the index requirements.

[0003] After optical adjustment, the adjustment posture needs to be fixed. The fixing method varies according to the requirements of different products and applications. Most of them are achieved by gluing, mechanical locking or laser welding. If the adjustment structure is not good, the adjustable components will move before and after fixing, thus changing the optimal position that has been adjusted, thereby reducing the coupling efficiency and affecting the product yield.

[0004] Therefore, there is an urgent need to design a laser fiber coupling adjustment device that can effectively improve the laser fiber coupling efficiency. Utility Model Content

[0005] The utility model aims to provide a laser optical fiber coupling adjustment device to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides a laser fiber coupling adjustment device, comprising:

[0007] A bracket, wherein a through hole is formed in the center of the bracket;

[0008] A light emitting unit, the light emitting unit is used to emit laser light; and the light emitting unit is embedded at one end of the through hole;

[0009] An optical fiber installation body, wherein one end of the optical fiber installation body is a columnar structure; the optical fiber installation body corresponds to the position of the through hole;

[0010] An adjustment component, the adjustment component includes an adapter ring and a hollow metal ball; the adapter ring is used to slide with one end face of the bracket, and the adapter ring is used to connect with the bracket; the hollow metal ball is used to rotationally cooperate with the adapter ring, and the hollow metal ball is used to connect with the adapter ring; the end of the optical fiber installation body is inserted into the columnar space in the hollow metal ball, the optical fiber installation body is slidably arranged in the columnar space, and the optical fiber installation body is connected to the hollow metal ball.

[0011] The light emitting unit is a laser diode.

[0012] A fixing groove is also dug in the through hole, and a convex lens is installed in the fixing groove.

[0013] The optical fiber installation body comprises an optical fiber and a metal tube; the metal tube is a columnar structure, and the optical fiber is bonded inside the metal tube.

[0014] A spherical groove is provided on the adapter ring, the hollow metal ball is placed in the spherical groove, and the hollow metal ball is welded and fixed in the spherical groove.

[0015] One end face of the adapter ring is welded and fixed to the end face of the bracket, the spherical groove passes through the end faces on both sides of the adapter ring, and the spherical groove corresponds to the position of the through hole.

[0016] The metal tube is welded and installed in the hollow metal ball.

[0017] The utility model discloses the following technical effects: the device can effectively increase the adjustable degrees of freedom and realize the alignment adjustment between the optical fiber and the laser. After the position adjustment is determined, the adjustment component is fixedly connected by welding, which can effectively improve the displacement before and after curing, effectively improve the product stability, and greatly improve the temperature adaptability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the internal structure of the utility model;

[0021] Among them, 1. light-emitting unit; 2. bracket; 3. convex lens; 4. adapter ring; 5. hollow metal ball; 6. metal tube; 7. optical fiber. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] In the prior art, due to the eccentricity of the chip inside the laser emitting element, the emitted laser is coupled into the optical fiber core of the optical fiber head through a lens; during the laser transmission process, due to the eccentricity of the chip itself, the eccentricity of the lens and the errors in the processing of mechanical parts, good coupling efficiency cannot be achieved by mechanical cooperation, and multi-dimensional adjustment of the optical fiber is required to compensate for the above-mentioned processing errors and achieve the best coupling efficiency.

[0025] Furthermore, the present application takes the optical fiber coupling of a laser diode as an example.

[0026] The utility model provides a laser optical fiber coupling adjustment device, comprising:

[0027] A bracket 2, wherein a through hole is provided at the center of the bracket 2;

[0028] A light emitting unit 1, which is used to emit laser light; and the light emitting unit 1 is embedded at one end of the through hole;

[0029] An optical fiber installation body, one end of which is a columnar structure; the optical fiber installation body corresponds to the position of the through hole;

[0030] An adjustment component includes an adapter ring 4 and a hollow metal ball 5; the adapter ring 4 is used to slide with one end face of the bracket 2, and the adapter ring 4 is used to connect with the bracket 2; the hollow metal ball 5 is used to rotate with the adapter ring 4, and the hollow metal ball 5 is used to connect with the adapter ring 4; the end of the optical fiber installation body is inserted into the columnar space in the hollow metal ball 5, the optical fiber installation body is slidably arranged in the columnar space, and the optical fiber installation body is connected to the hollow metal ball 5.

[0031] The light emitting unit 1 is a laser diode.

[0032] A fixing groove is also dug in the through hole, and a convex lens 3 is installed in the fixing groove.

[0033] The optical fiber installation body includes an optical fiber 7 and a metal tube 6 ; the metal tube 6 is a columnar structure, and the optical fiber 7 is bonded inside the metal tube 6 .

[0034] A spherical groove is formed on the adapter ring 4 , and a hollow metal ball 5 is placed in the spherical groove. The hollow metal ball 5 is welded and fixed in the spherical groove.

[0035] One end face of the adapter ring 4 is welded and fixed to the end face of the bracket 2 , and the spherical groove passes through the end faces of both sides of the adapter ring 4 , and the position of the spherical groove corresponds to the position of the through hole.

[0036] The metal tube 6 is welded and installed in the hollow metal ball 5 .

[0037] In one embodiment of the present invention, the adjustment component improves the coupling efficiency by adjusting the relative positions of the optical fiber 7 and the light-emitting unit.

[0038] In one embodiment of the utility model, during the use of the adjustment component, the light-emitting unit 1 is first fixedly installed on one side of the through hole; the convex lens 3 is also fixedly installed in the fixing groove; the adapter ring 4 is placed on the end face of the bracket 2 away from the light-emitting unit 1, and the adapter ring 4 can be translated on the end face to achieve the adjustment of the eccentric center point, and the hollow metal ball 5 is placed in the spherical groove, and the hollow metal ball 5 drives the optical fiber to achieve the adjustment of the eccentric angle; the metal tube 6 is matched with the columnar space gap in the hollow metal ball 5, so that the metal tube 6 can slide relative to the hollow metal ball 5 to achieve the up and down defocus adjustment.

[0039] Furthermore, after the position is determined through testing, the adapter ring 4 is welded to the end face of the bracket 2, and the adapter ring 4 and the hollow metal ball 5, and the hollow metal ball 5 and the metal tube 6 are solidified by welding to ensure the stability of the adjustment assembly.

[0040] In one embodiment of the present invention, the spherical groove is a hemispherical groove, which is convenient for placing the hollow metal ball 5 .

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A laser fiber coupling adjustment device, characterized in that: include: A bracket (2), wherein a through hole is formed at the center of the bracket (2); A light-emitting unit (1), the light-emitting unit (1) being used for emitting laser light; and the light-emitting unit (1) being embedded at one end of the through hole; An optical fiber installation body, wherein one end of the optical fiber installation body is a columnar structure; the optical fiber installation body corresponds to the position of the through hole; An adjustment component, the adjustment component comprising an adapter ring (4) and a hollow metal ball (5); the adapter ring (4) is used to slide with one end face of a bracket (2), and the adapter ring (4) is used to be connected to the bracket (2); the hollow metal ball (5) is used to rotate with the adapter ring (4), and the hollow metal ball (5) is used to be connected to the adapter ring (4); the end of the optical fiber installation body is inserted into the columnar space in the hollow metal ball (5), the optical fiber installation body is slidably arranged in the columnar space, and the optical fiber installation body is connected to the hollow metal ball (5).

2. A laser fiber coupling adjustment device according to claim 1, characterized in that: The light emitting unit (1) is a laser diode.

3. A laser fiber coupling adjustment device according to claim 1, characterized in that: A fixing groove is also dug in the through hole, and a convex lens (3) is installed in the fixing groove.

4. The laser fiber coupling adjustment device according to claim 1, characterized in that: The optical fiber installation body comprises an optical fiber (7) and a metal tube (6); the metal tube (6) is a columnar structure, and the optical fiber (7) is bonded inside the metal tube (6).

5. The laser fiber coupling adjustment device according to claim 1, characterized in that: The adapter ring (4) is provided with a spherical groove, the hollow metal ball (5) is placed in the spherical groove, and the hollow metal ball (5) is welded and fixed in the spherical groove.

6. A laser fiber coupling adjustment device according to claim 5, characterized in that: One end face of the adapter ring (4) is welded and fixed to the end face of the bracket (2); the spherical groove penetrates both end faces of the adapter ring (4); and the position of the spherical groove corresponds to that of the through hole.

7. The laser fiber coupling adjustment device according to claim 4, characterized in that: The metal tube (6) is welded and installed in the hollow metal ball (5).

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