Laser pumping source

Abstract

The utility model provides a laser pumping source. The laser pumping source comprises a laser module, a focusing assembly and an optical fiber, the laser module comprises a plurality of laser assemblies, each laser assembly comprises a light source and a first collimating mirror, and the light sources are spirally and sequentially arranged at intervals around the same axis; the focusing assembly comprises a second collimating mirror, a focusing mirror and a plurality of reflectors, all the reflectors are sequentially arranged along the axis, light beams emitted by all the light sources pass through the corresponding first collimating mirrors and then are directly emitted or reflected by the reflectors to be combined to form combined light beams, and the combined light beams are transmitted to the focusing assembly. The combined light beam sequentially passes through the second collimating mirror and the focusing mirror, the focusing mirror focuses the combined light beam collimated by the second collimating mirror to the optical fiber, and the combined light beam is output by the optical fiber. According to the laser pumping source provided by the embodiment of the invention, debugging procedures can be reduced, and debugging efficiency can be improved.

Description

Technical Field

[0001] The present application belongs to the field of laser processing technology, and more specifically, relates to a laser pump source. Background Art

[0002] In the related technology, the laser pump source is generally composed of multiple laser chips, each laser chip passes through a fast-axis collimator, a slow-axis collimator, a spatial beam combiner, is coupled into an optical fiber, and is output from the optical fiber. The number of chips is consistent with the number of fast-axis collimators, slow-axis collimators, and reflectors, and each lens needs to be individually adjusted, involving many debugging procedures and low debugging efficiency. Utility Model Content

[0003] The embodiment of the present application provides a laser pump source, which can reduce the debugging process and improve the debugging efficiency.

[0004] The technical solution adopted in the embodiment of the present application is: to provide a laser pump source, including:

[0005] Laser modules, focusing components and optical fibers;

[0006] The laser module includes a plurality of laser components, each of which includes a light source and a first collimator, and the light sources are arranged in a spiral shape around the same axis in sequence;

[0007] The focusing assembly includes a second collimator, a focusing mirror and a plurality of reflecting mirrors, and the reflecting mirrors are arranged in sequence along the axis. After the light beams emitted by the light sources pass through the corresponding first collimator, they are directly emitted or reflected by the reflecting mirrors to form a combined light beam. The combined light beam passes through the second collimator and the focusing mirror in sequence. The focusing mirror focuses the combined light beam collimated by the second collimator onto the optical fiber and outputs it from the optical fiber.

[0008] Furthermore, the distances between two adjacent light sources in the axis direction are equal.

[0009] Furthermore, in the projections of the light sources on the plane perpendicular to the axis, except for the two light sources close to the second collimator, the intervals between the other two adjacent light sources are equal.

[0010] Furthermore, one of the laser components, the second collimating lens and the focusing lens are arranged in sequence along a straight line, and the light beam of the laser component is not reflected by the reflecting mirror before reaching the second collimating lens.

[0011] Furthermore, the first collimator is a fast axis collimator.

[0012] Furthermore, the second collimator is a slow axis collimator.

[0013] Furthermore, the axis direction is vertical or horizontal.

[0014] Furthermore, it also includes a shell, the laser module and the focusing assembly are both arranged in the shell, one end of the optical fiber is located in the shell, and the other end extends out of the shell.

[0015] Furthermore, the light source is a laser chip.

[0016] The beneficial effect of the laser pump source provided by the embodiment of the present application is that: the laser pump source of the embodiment of the present application is provided with a laser component, a focusing component and an optical fiber, the light source of the laser component is arranged in a spiral shape around the same axis and staggered with each other, and the light beams emitted by each light source pass through the first collimator, and after being directly emitted or reflected by a reflector, they are combined to form a combined light beam, and then pass through the second collimator and the focusing mirror to be output from the optical fiber. In the embodiment of the present application, during debugging, there is only one second collimator, and only one adjustment is required after the light beams are combined, which reduces the debugging process and greatly improves the debugging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of an embodiment of a laser pump source provided in an embodiment of the present application having three laser components;

[0019] Figure 2 A schematic diagram of an embodiment of a laser pump source provided in an embodiment of the present application having seven laser components;

[0020] Figure 3 A schematic diagram of seven laser assemblies provided in an embodiment of the present application arranged spirally around an axis.

[0021] Among them, the reference numerals in the figure are:

[0022] 10. laser module; 11. laser assembly; 111. light source; 112. first collimator;

[0023] 20. Focusing assembly; 21. Second collimating mirror; 22. Focusing mirror; 23. Reflecting mirror;

[0024] 30. Optical fiber;

[0025] 40. Shell. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, 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 application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] See also Figure 1 and Figure 2 The laser pump source provided in the embodiment of the present application is now described. The laser pump source provided in the embodiment of the present application includes a laser module 10, a focusing assembly 20 and an optical fiber 30.

[0031] Among them, refer to Figure 2 and Figure 3 , the laser module 10 includes a plurality of laser components 11, each of the laser components 11 includes a light source 111 and a first collimator 112, and the light sources 111 are arranged in a spiral shape around the same axis and are spaced apart in sequence. That is, each laser component 11 includes a light source 111 and a first collimator 112, and the light beam emitted by the light source 111 is directly collimated by the first collimator 112 before being emitted. The light sources 111 are arranged in a spiral shape around the same axis and are spaced apart in sequence, that is, the distance between each light source 111 and the axis is equal, and there is a spacing in the axis direction, so that two adjacent light sources 111 are staggered and will not block each other's light beams.

[0032] Specifically, the first collimating mirror 112 is a fast axis collimating mirror.

[0033] Reference Figure 1 and Figure 2 The focusing assembly 20 includes a second collimator 21, a focusing mirror 22 and a plurality of reflectors 23. The reflectors 23 are sequentially arranged along the axis. The light beams emitted by the light sources 111 pass through the corresponding first collimator 112, and are directly emitted or reflected by the reflector 23 to form a combined light beam. The combined light beam passes through the second collimator 21 and the focusing mirror 22 in sequence. The focusing mirror 22 focuses the combined light beam collimated by the second collimator 21 onto the optical fiber 30, and outputs the combined light beam from the optical fiber 30.

[0034] Each reflector 23 is arranged in sequence along the axis. The light source 111 emits a light beam perpendicular to the axis toward the axis. After being collimated by the first collimator 112, it reaches the axis, and the reflector 23 is arranged at the axis. Each reflector 23 is arranged at a different angle. Each light beam is irradiated onto each reflector 23 respectively. After each reflector 23 changes the direction of the light beam, a plurality of parallel light beams are formed. That is, each reflector 23 also has a spacing on the axis, corresponding to the position of the corresponding light source 111.

[0035] In addition, among these light sources 111, if the direction of the light beam of a certain light source 111 itself is consistent with the direction of the parallel light beam, the light beam does not need to be reflected by the reflector 23. Therefore, the combined light beam is formed by combining the light beams of each light source 111 directly or after being reflected by the reflector 23. In some embodiments, the initial direction of the light beams of each light source 111 is not consistent with the direction of the combined light beam, then each light source 111 is correspondingly provided with a reflector 23, and the directions of the light beams are made consistent through reflection by the reflector 23 to form the combined light beam. In some embodiments, the initial direction of the light beam of one light source 111 is consistent with the direction of the combined light beam, and the initial direction of the light beams of other light sources 111 is not consistent with the direction of the combined light beam, then only the light source 111 whose initial direction is inconsistent with the direction of the combined light beam is correspondingly provided with a reflector 23. That is, if the number of light sources 111 is an odd number N greater than 2, then the number of reflectors 23 is N-1. In some embodiments, the number of light sources 111 is 3, and the number of reflectors 23 is 2. In some embodiments, the number of light sources 111 is seven, and the number of reflectors 23 is six.

[0036] The combined light beam is actually multiple parallel light beams, which are irradiated to the same second collimator 21, collimated, and then coupled to the optical fiber 30 through the focusing lens 22, and output by the optical fiber 30. In the embodiment of the present application, during debugging, there is only one second collimator 21, and only one adjustment is required after the light beams are combined, which reduces the debugging process and greatly improves the debugging efficiency. Specifically, the second collimator is a slow axis collimator.

[0037] Based on the above configuration, the embodiment of the present application also saves the number of second collimating lenses 21, which can reduce costs. At the same time, the structure of the laser pump source is more compact and smaller in size.

[0038] In the related art, if the number of light sources 111 is 7, the number of fast-axis collimators is 7, the number of slow-axis collimators is 7, and the number of times the collimators need to be adjusted is 14 times. In the embodiment of the present application, if the number of light sources 111 is 7, the number of first collimators 112 is 7, the number of second collimators 21 is 1, and the number of times the collimators need to be adjusted is 8 times, which is significantly less than the related art and more convenient.

[0039] Reference Figure 3 , the intervals between two adjacent light sources 111 in the axis direction are equal. That is, in the axis direction, the light sources 111 are arranged at equal intervals, all of which are L.

[0040] In the projection of each light source 111 on a plane perpendicular to the axis, the interval between two adjacent light sources 111 can be set to be equal, or unequal, or can be partially equal and partially unequal.

[0041] In the embodiment of the present application, in the projection of each of the light sources 111 on the plane perpendicular to the axis, except for the two light sources 111 close to the second collimator 21, the spacing between the other two adjacent light sources 111 is equal. Since a direction needs to be reserved for the combined light beam to be emitted, in the circumferential direction, each light source 111 does not completely surround the circumference, but leaves a gap, and except for the larger spacing between the light sources 111 at the gap, the spacing between the other two adjacent light sources 111 can be equal, so as to facilitate the calculation and control of the placement of the reflector 23.

[0042] Reference Figure 1 and Figure 2 , the laser assembly 11, the second collimator 21 and the focusing lens 22 are arranged in a straight line, and the light beam of the laser assembly 11 is not reflected by the reflector 23 before reaching the second collimator 21. That is, the initial direction of the light beam of a group of laser assemblies 11 is the same as the direction of the combined light beam, so the light beam of the laser assembly 11 does not need to be reflected by the reflector 23.

[0043] Further, the axis direction is vertical or horizontal. When the axis direction is vertical, each light source 111 has a height difference, and the height difference between two adjacent light sources 111 is equal. When the axis direction is horizontal, each light source 111 has a spacing in the horizontal direction, and the spacing between two adjacent light sources 111 is equal.

[0044] The laser pump source of the embodiment of the present application further includes a housing, the laser module 10 and the focusing assembly 20 are both disposed in the housing, one end of the optical fiber 30 is located in the housing, and the other end extends out of the housing. By providing the housing, the laser module 10 and the focusing assembly 20 are protected inside to prevent external dust from affecting the laser module 10 and the focusing assembly 20.

[0045] Furthermore, the light source 111 is a laser chip, and each light source 111 uses the same laser chip to ensure the quality of the combined light beam.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A laser pump source, characterized in that: include: Laser modules, focusing components and optical fibers; The laser module includes a plurality of laser components, each of which includes a light source and a first collimator, and the light sources are arranged in a spiral shape around the same axis in sequence; The focusing assembly includes a second collimator, a focusing mirror and a plurality of reflecting mirrors, and the reflecting mirrors are arranged in sequence along the axis. After the light beams emitted by the light sources pass through the corresponding first collimator, they are directly emitted or reflected by the reflecting mirrors to form a combined light beam. The combined light beam passes through the second collimator and the focusing mirror in sequence. The focusing mirror focuses the combined light beam collimated by the second collimator onto the optical fiber and outputs it from the optical fiber.

2. The laser pump source according to claim 1, characterized in that: The distances between two adjacent light sources in the axis direction are equal.

3. The laser pump source according to claim 1, characterized in that: In the projections of the light sources on the plane perpendicular to the axis, except for the two light sources close to the second collimator, the intervals between the other two adjacent light sources are equal.

4. The laser pump source according to claim 1, characterized in that: The laser assembly, the second collimating lens and the focusing lens are arranged in sequence along a straight line, and the light beam of the laser assembly is not reflected by the reflecting mirror before reaching the second collimating lens.

5. The laser pump source according to claim 1, characterized in that: The first collimator is a fast axis collimator.

6. The laser pump source according to claim 1, characterized in that: The second collimating mirror is a slow axis collimating mirror.

7. The laser pump source according to claim 1, characterized in that: The axis direction is vertical or horizontal.

8. The laser pump source according to claim 1, characterized in that: It also includes a shell, the laser module and the focusing assembly are both arranged in the shell, one end of the optical fiber is located in the shell, and the other end extends out of the shell.

9. The laser pump source according to claim 1, characterized in that: The light source is a laser chip.

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