Pumping source and laser
By designing the incident end of the transmission optical fiber as a slope, the problem of returning light damage to the laser chip is solved, and the cost reduction and volume reduction are achieved.
Patent Information
- Application Number
- CN202422332663.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In the prior art, the return light of the laser returns to the active area of the laser chip along the optical path to the pump source, causing chip damage, while increasing the cost of the pump source and the laser.
By designing the incident end of the transmission optical fiber as a slope, the inclined faces the return light to be refracted, causing it to be tilted out, avoiding the return light to return to the laser chip, active area along the original path, and canceling the use of the filter to reduce costs.
It effectively avoids damage to the laser chip by returning light, reduces the cost of the pump source, and reduces the volume of the pump source and laser.
Smart Images
Figure CN223079553U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser technology, and particularly to a pump source and a laser. Background Art
[0002] Currently, lasers have been widely used in many fields such as scientific research, medical treatment, and industrial processing. Among them, when the laser emitted by the laser acts on a highly reflective material, part of the laser will be reflected by the highly reflective material back into the pipeline of the laser and return along the optical path of the laser to the active region of the laser chip of the pump source, resulting in damage to the laser chip of the pump source.
[0003] To avoid this problem, in related technologies, a filter is provided on the optical path between the laser chip of the pump source and the transmission optical fiber, and the return light is filtered by the filter. This method of adding a filter in the pump source to filter the return light will increase the cost of the pump source, and thus increase the cost of the laser. Utility Model Content
[0004] The embodiments of this application provide a pump source and a laser, aiming to avoid the return light returning along the optical path of the laser to the active region of the laser chip of the pump source, resulting in damage to the laser chip, while reducing the cost of the pump source.
[0005] The embodiments of this application provide a pump source, including:
[0006] A mounting seat;
[0007] A light-emitting component, connected to the mounting seat, the light-emitting component includes a beam combining structure and a plurality of light-emitting structures, the light-emitting structures are used to emit laser light, and the beam combining structure is used to combine the laser light emitted by the plurality of light-emitting structures to form combined light;
[0008] A transmission optical fiber, connected to the mounting seat, the transmission optical fiber includes an incident end and an exit end opposite to each other, the end face of the incident end is an inclined plane, and when the transmission optical fiber extends in a straight line, the end face is inclined with respect to the length direction of the transmission optical fiber.
[0009] In some embodiments, the angle at which the end face of the incident end is inclined with respect to the extending direction of the transmission optical fiber is greater than or equal to 5° and less than or equal to 11°.
[0010] In some embodiments, the angle at which the end face of the incident end is inclined with respect to the extending direction of the transmission optical fiber is 8°.
[0011] In some embodiments, the transmission optical fiber includes a light-incident section extending from the incident end to the exit end, and the combined light is substantially parallel to the light-incident section.
[0012] In some embodiments, there is a direct optical path connection between the beam combining structure and the light emitting structure.
[0013] In some embodiments, the light emitting structure includes a laser chip and a fast and slow axis collimating lens. The laser chip is used to emit the laser, and the fast and slow axis collimating lens is located on the optical path at the output end of the laser chip and is used to collimate the laser in the fast and slow axes.
[0014] The beam combining structure is located on the output optical path of the fast and slow axis collimating lens, and there is a direct optical path connection between the beam combining structure and the fast and slow axis collimating lens.
[0015] In some embodiments, there is a direct optical path connection between the beam combining structure and the incident end.
[0016] In some embodiments, the beam combining structure includes a collimating lens and a plurality of reflectors. The plurality of reflectors correspond to the fast and slow axis collimating lenses of the plurality of light emitting structures one by one and have a direct optical path connection, and reflect the laser to the collimating lens. There is a direct optical path connection between the collimating lens and the reflector, and there is a direct optical path connection between the collimating lens and the incident end.
[0017] In some embodiments, the end face is provided with a coating layer.
[0018] An embodiment of the present application further provides a laser, which includes the pump source as described above. The pump source includes:
[0019] A mounting seat;
[0020] A light emitting component, connected to the mounting seat. The light emitting component includes a beam combining structure and a plurality of light emitting structures. The light emitting structures are used to emit laser, and the beam combining structure is used to combine the laser emitted by the plurality of light emitting structures to form combined light.
[0021] A transmission optical fiber, connected to the mounting seat. The transmission optical fiber includes an incident end and an output end that are opposite to each other. The end face of the incident end is an inclined surface. When the transmission optical fiber extends in a straight line, the end face is inclined with respect to the length direction of the transmission optical fiber.
[0022] In the pump source provided by the embodiment of the present application, the end face of the incident end of the transmission optical fiber is an inclined plane. When the transmission optical fiber extends linearly, the inclined plane of the incident end of the transmission optical fiber is inclined with respect to the length direction of the transmission optical fiber. Thus, when there is retroreflected light returning along the optical path of the transmission optical fiber of the laser to the inclined plane of the incident end, the inclined plane of the incident end can refract the retroreflected light, so that the retroreflected light is inclined at a certain angle relative to the combined beam when it exits from the inclined plane of the incident end, thereby avoiding all or part of the retroreflected light from transmitting along the optical paths of the beam combining structure and the light emitting structure, which is beneficial to improving the situation where the retroreflected light returns along the optical path of the laser to the active region of the laser chip of the pump source, resulting in damage to the laser chip, while reducing the cost of the pump source.
[0023] Moreover, the pump source provided by the embodiment of the present application does not need to be provided with a filter in the pump source. Therefore, the space inside the pump source can be reduced, the size of the pump source can be made smaller, which is beneficial to reducing the overall volume of the laser. Brief Description of the Drawings
[0024] The following will, in conjunction with the accompanying drawings, clearly and completely describe the technical solutions in the embodiments of the present application through a detailed description of the specific embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0025] Figure 1 It is a schematic structural diagram of an embodiment of the pump source provided by the embodiment of the present application;
[0026] Figure 2 It is an enlarged view of the incident end of the transmission optical fiber provided by the embodiment of the present application.
[0027] Pump source 100; mounting base 110; light emitting component 111; beam combining structure 1111; reflector 1112; collimating lens 1113; light emitting structure 1114; laser chip 1115; fast and slow axis collimating lens 1116; transmission optical fiber 120; light incident section 121; incident end 1211; end face 1212. Detailed Description of the Embodiment
[0028] The following will, in conjunction with the accompanying drawings in the embodiments of the present application, clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0029] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These 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. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.
[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection or a connection that allows mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0031] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.
[0032] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
[0033] An embodiment of the present application provides a pump source and a laser.
[0034] Figure 1 It is a schematic structural diagram of an embodiment of the pump source provided by the embodiment of the present application. As Figure 1 shown, the pump source 100 includes a mounting base 110, a light emitting component 111, and a transmission optical fiber 120. The transmission optical fiber 120 includes an incident end 1211 and an output end that are opposite to each other. The light emitting component 111 and the transmission optical fiber 120 are respectively mounted on the mounting base 110. The light emitting component 111 is used to emit multiple beams of laser light, and combine the multiple beams of laser light to form a combined beam of light and then transmit it to the incident end 1211 of the transmission optical fiber 120, so that the combined beam of light is coupled from the incident end 1211 of the transmission optical fiber 120 into the transmission optical fiber 120, and is transmitted to the output end along the extending direction of the transmission optical fiber 120 and emitted from the output end.
[0035] Among them, the light emitting component 111 includes a beam combining structure 1111 and a plurality of light emitting structures 1114. The light emitting structure 1114 is used to emit laser light, and the beam combining structure 1111 is used to combine the laser light emitted by the plurality of light emitting structures 1114 to form a combined beam of light. The incident end 1211 of the transmission optical fiber 120 is located on the optical path of the output end of the beam combining structure 1111, so that the beam combining structure 1111 combines the laser light emitted by the plurality of light emitting structures 1114 to form a combined beam of light, transmits it from the output end of the beam combining structure 1111 to the incident end 1211 of the transmission optical fiber 120, and couples the combined beam of light into the transmission optical fiber 120.
[0036] Specifically, the light-emitting structure 1114 includes a laser chip 1115 and a fast and slow axis collimating lens 1116. The laser chip 1115 is used to emit laser light. The fast and slow axis collimating lens 1116 is located on the optical path at the output end of the laser chip 1115 and is used to collimate the laser light in the fast and slow axes. Among them, multiple light-emitting structures 1114 are sequentially and spaced apart along the first direction. The laser chip 1115 and the fast and slow axis collimating lens 1116 are sequentially distributed along the second direction. The second direction is substantially perpendicular to the first direction. The laser chip 1115 emits laser light along the second direction to the fast and slow axis collimating lens 1116. After the fast and slow axis collimating lens 1116 collimates the laser light emitted by the laser chip 1115, the laser light continues to be transmitted along the second direction to the beam combining structure 1111.
[0037] Continuing to refer to Figure 1 , the beam combining structure 1111 is located on the output optical path of the fast and slow axis collimating lens 1116. The beam combining structure 1111 is used to combine the laser light collimated by the fast and slow axis collimating lens 1116 to form combined light and transmit the combined light to the incident end 1211 of the transmission optical fiber 120.
[0038] The beam combining structure 1111 may include a collimating lens 1113 and multiple reflectors 1112. The multiple reflectors 1112 are in optical path communication with the multiple light-emitting structures 1114 one by one and reflect the laser light emitted by the multiple light-emitting structures 1114 to the collimating lens 1113. The collimating lens 1113 is used to combine the laser light reflected by the reflectors 1112 to form combined light.
[0039] Among them, the multiple reflectors 1112 are in optical path communication with the fast and slow axis collimating lenses 1116 of the multiple light-emitting structures 1114 one by one and reflect the laser light that has been collimated in the fast and slow axes by the fast and slow axis collimating lens 1116 to the collimating lens 1113. Specifically, the multiple reflectors 1112 are sequentially distributed along the first direction, and the reflector 1112 is located on the side of the corresponding fast and slow axis collimating lens 1116 away from the laser chip 1115. The laser light reflected by the reflector 1112 is transmitted along the first direction to the collimating lens 1113, so that the collimating lens 1113 combines most of the laser light.
[0040] In the related art, in order to prevent the laser emitted by the laser from acting on the high-reflectivity material, a situation may occur where the high-reflectivity material reflects part of the laser back into the pipeline of the laser and returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115 of the pump source 100. Usually, a filter is provided on the optical path between the laser chip 1115 of the pump source 100 and the transmission optical fiber 120 to filter the returned light through the filter. This method of adding a filter in the pump source 100 to filter the returned light will increase the material cost and assembly cost of the pump source 100, and further increase the production cost of the laser. Moreover, the setting of the filter will increase the overall volume of the pump source 100, and further increase the volume of the laser.
[0041] To improve the above problem, as Figure 1 and Figure 2 shown, the end face 1212 of the incident end 1211 of the transmission optical fiber 120 of the pump source 100 provided in the embodiment of the present application is an inclined plane. When the transmission optical fiber 120 extends in a straight line, that is, when the transmission optical fiber 120 is in a straight state, the end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the length direction of the transmission optical fiber 120, and the angle formed by the end face 1212 of the incident end 1211 of the transmission optical fiber 120 and the length direction of the transmission optical fiber 120 is an acute angle, so as to improve the situation where the returned light returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115, while reducing the cost of the pump source 100 and reducing the size of the pump source 100.
[0042] In the embodiment of the present application, the pump source 100 is provided by making the end face 1212 of the incident end 1211 of the transmission optical fiber 120 an inclined plane. When the transmission optical fiber 120 extends in a straight line, the inclined plane of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the length direction of the transmission optical fiber 120. Thus, when there is returned light returning along the optical path of the transmission optical fiber 120 of the laser to the inclined plane of the incident end 1211, the inclined plane of the incident end 1211 can refract the returned light, so that the returned light is inclined at a certain angle relative to the combined beam when it exits from the inclined plane of the incident end 1211, thereby preventing all or part of the returned light from transmitting along the optical paths of the combined beam structure 1111 and the light-emitting structure 1114, which is beneficial to improving the situation where the returned light returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115, while reducing the cost of the pump source 100.
[0043] Moreover, in the embodiment of the present application, the pump source 100 does not need to be provided with a filter inside the pump source 100. Therefore, the space inside the pump source 100 can be reduced, making the size of the pump source 100 smaller, which is beneficial to reducing the overall volume of the laser.
[0044] In some embodiments, when the transmission optical fiber 120 extends in a straight line, that is, when the transmission optical fiber 120 is in a straight state, the angle α at which the end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the extension direction of the transmission optical fiber 120 can be greater than or equal to 5°, so as to increase the refraction angle of the end face 1212 of the incident end 1211 to the return light, so that more or even all of the return light will not be transmitted along the optical path of the beam combining structure 1111 and the light emitting structure 1114. Among them, the angle α at which the end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the extension direction of the transmission optical fiber 120 can be 6°, 7°, 8°, 9°, 10°, etc., which is not limited here.
[0045] In addition, the angle α at which the end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the extension direction of the transmission optical fiber 120 can be less than or equal to 11°, so as to avoid a significant impact on the coupling of the combined light from the end face 1212 of the incident end 1211 to the transmission optical fiber 120. The angle α at which the end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined relative to the extension direction of the transmission optical fiber 120 can be 6.5°, 7.5°, 8.5°, 9.5°, 10.5°, etc., which is not limited here.
[0046] In some preferred embodiments, the angle α of the end face 1212 of the incident end 1211 of the transmission optical fiber 120 tilted relative to the extension direction of the transmission optical fiber 120 can be greater than or equal to 5° and less than or equal to 11°, so that the end face 1212 of the incident end 1211 of the transmission optical fiber 120 can better couple the combined light into the transmission optical fiber 120 while having a larger refraction angle for the returned light, thereby reducing the proportion of the returned light of the laser chip 1115 returning to the pump source 100 along the original path as much as possible.
[0047] Specifically, the end face 1212 of the incident end 1211 of the transmission optical fiber 120 can be inclined at an angle α of 8° relative to the extension direction of the transmission optical fiber 120, so that the end face 1212 of the incident end 1211 of the transmission optical fiber 120 has a better effect on the coupling of the combined light and the refraction of the returned light.
[0048] like Figure 1 and Figure 2As shown, the transmission optical fiber 120 includes an incident light section 121 extending from the incident end 1211 to the exit end. In some embodiments, the combined light can be made substantially parallel to the incident light section 121 to facilitate forming an appropriate angle between the combined light and the end face 1212 of the incident end 1211 of the transmission optical fiber 120. Specifically, the incident light section 121 extends in a first direction. The end face 1212 of the incident end 1211 of the transmission optical fiber 120 is inclined with respect to the length direction of the incident light section 121. The angle formed between the end face 1212 of the incident end 1211 of the transmission optical fiber 120 and the length direction of the incident light section 121 is greater than or equal to 79° and less than or equal to 85°.
[0049] In some embodiments, the direct optical path between the beam combining structure 1111 and the light emitting structure 1114 of the pump source 100 can be made to communicate, and the laser emitted by the light emitting structure 1114 is directly transmitted to the beam combining structure 1111 for beam combining, thereby reducing the distance between the beam combining structure 1111 and the light emitting structure 1114, which is beneficial to reducing the size of the pump source 100.
[0050] Among them, the direct optical path between the beam combining structure 1111 and the fast and slow axis collimating lens 1116 can be made to communicate, and the laser collimated by the fast and slow axis collimating lens 1116 is directly transmitted to the beam combining structure 1111 for beam combining to form combined light. Specifically, there is a direct optical path communication between the mirror 1112 of the beam combining structure 1111 and the fast and slow axis collimating lens 1116.
[0051] In some embodiments, the direct optical path between the beam combining structure 1111 and the incident end 1211 of the transmission optical fiber 120 can be made to communicate, and the combined light formed by beam combining by the beam combining structure 1111 is directly transmitted to the incident end 1211 of the transmission optical fiber 120 and coupled into the transmission optical fiber 120, thereby reducing the distance between the beam combining structure 1111 and the incident end 1211 of the transmission optical fiber 120, which is beneficial to reducing the size of the pump source 100.
[0052] Specifically, there can be a direct optical path communication between the collimating lens 1113 of the beam combining structure 1111 and the incident end 1211 of the transmission optical fiber 120.
[0053] In some embodiments, the direct optical path between the collimating lens 1113 and the mirror 1112 can be made to communicate, and the mirror 1112 directly reflects the laser to the collimating lens 1113 to reduce the distance between the collimating lens 1113 and the mirror 1112, which is beneficial to reducing the size of the pump source 100.
[0054] In some embodiments, a coating layer can be provided on the end face 1212 of the incident end 1211 of the transmission optical fiber 120 to reduce the loss of the combined light at the end face 1212 of the incident end 1211 of the transmission optical fiber 120.
[0055] The following table shows the comparison data of the amplification coupling efficiency and amplification coupling power between a conventional pump source and the pump source 100 provided in the embodiments of the present application. Among them, the amplification coupling power is mainly distributed at 14 W, and the amplification coupling efficiency is distributed between 87% and 89%. It can be seen that by using the pump source 100 provided in the embodiments of the present application, the problem that the retroreflected light returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115, is improved. While reducing the cost of the pump source 100, it has basically no impact on the amplification coupling efficiency and amplification coupling power of the pump source 100.
[0056]
[0057] The following table shows the comparison experimental data of the temperature between a conventional pump source and the pump source 100 provided in the embodiments of the present application. Among them, the temperature at the output end of the transmission optical fiber 120 is mainly distributed at 28 °C. It can be seen that by using the pump source 100 provided in the embodiments of the present application, the problem that the retroreflected light returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115, is improved. While reducing the cost of the pump source 100, it has basically no impact on the temperature of the pump source 100.
[0058]
[0059] The following table shows the comparison experimental data of the numerical aperture (NA) between a conventional pump source and the pump source 100 provided in the embodiments of the present application. Among them, the NA of the transmission optical fiber 120 of the pump source 100 in the embodiments of the present application is 0.01 larger than that of the transmission optical fiber of the conventional pump source, and it does not exceed the standard value of 0.22 and is within the qualified range. It can be seen that by using the pump source 100 provided in the embodiments of the present application, the problem that the retroreflected light returns along the optical path of the laser to the active region of the laser chip 1115 of the pump source 100, resulting in damage to the laser chip 1115, is improved. While reducing the cost of the pump source 100, it has basically no impact on the NA of the transmission optical fiber 120 of the pump source 100.
[0060]
[0061] The embodiments of the present application further provide a laser, which includes a pump source. The specific structure of the pump source refers to the above embodiments. Since this laser adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0062] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0063] The above has introduced in detail a pump source and a laser provided by an embodiment of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and 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 application.
Claims
1. A pump source, characterized in that, Comprising: Mounting base; Light-emitting component, connected to the mounting base, the light-emitting component includes a beam combining structure and a plurality of light-emitting structures, the light-emitting structures are used to emit laser light, and the beam combining structure is used to combine the laser light emitted by the plurality of light-emitting structures to form combined light; Transmission optical fiber, connected to the mounting base, the transmission optical fiber includes an incident end and an exit end opposite to each other, the end face of the incident end is an inclined plane, and when the transmission optical fiber extends linearly, the end face is inclined with respect to the length direction of the transmission optical fiber.
2. The pump source according to claim 1, characterized in that, The angle at which the end face of the incident end is inclined with respect to the extending direction of the transmission optical fiber is greater than or equal to 5° and less than or equal to 11°.
3. The pump source according to claim 2, characterized in that, The angle at which the end face of the incident end is inclined with respect to the extending direction of the transmission optical fiber is 8°.
4. The pump source according to any one of claims 1 to 3, characterized in that, The transmission optical fiber includes a light-incident section extending from the incident end to the exit end, and the combined light is substantially parallel to the light-incident section.
5. The pump source according to any one of claims 1 to 3, characterized in that, There is a direct optical path connection between the beam combining structure and the light-emitting structure.
6. The pump source according to claim 5, characterized in that, The light-emitting structure includes a laser chip and a fast and slow axis collimating lens, the laser chip is used to emit the laser light, and the fast and slow axis collimating lens is located on the optical path of the output end of the laser chip and is used to collimate the laser light in the fast and slow axes; The beam combining structure is located on the output optical path of the fast and slow axis collimating lens, and there is a direct optical path connection between the beam combining structure and the fast and slow axis collimating lens.
7. The pump source according to any one of claims 1 to 3, characterized in that, There is a direct optical path connection between the beam combining structure and the incident end.
8. The pump source according to claim 7, wherein The beam combining structure includes a collimating lens and a plurality of reflectors, the plurality of reflectors correspond to the fast and slow axis collimating lenses of the plurality of light-emitting structures one by one and have a direct optical path connection, and reflect the laser light to the collimating lens, there is a direct optical path connection between the collimating lens and the reflector, and there is a direct optical path connection between the collimating lens and the incident end.
9. The pump source according to any one of claims 1 to 3, characterized in that, The end face is provided with a coating layer.
10. A laser, characterized in that, The laser includes the pump source according to any one of claims 1 to 9.