Pumping source and laser

Abstract

The utility model belongs to the technical field of laser processing, and more particularly relates to a pumping source and a laser, the pumping source comprises a laser generation assembly, a laser convergence assembly and at least one light receiving groove, the laser generation assembly comprises a plurality of chips, the chips generate laser after being electrified, the laser convergence assembly is used for converging the laser generated by the chips, and the light receiving groove is used for receiving the laser generated by the chips. The light receiving groove is formed in a light path transmitted by the laser converging assembly so as to absorb stray light transmitted by the laser converging assembly, and the groove bottom of the light receiving groove is a cambered surface; the laser comprises the pumping source, the stray light is reflected for multiple times in the light receiving groove to consume the energy of the stray light, so that the surface temperature of the laser chip is prevented from rising, and the service life of the laser chip is prolonged.

Description

Technical Field

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

[0002] The pump source is the core component of the laser. The pump source mainly generates lasers by energizing multiple laser chips and focusing the lasers of the laser chips onto the optical fiber through lenses. However, when the lens reflects or focuses the laser, it transmits stray light, which has high energy. Stray light directly reflected on the surface of the laser chip will cause the surface temperature of the laser chip to rise, reducing the service life of the laser chip. Utility Model Content

[0003] The embodiments of the present application provide a pump source and a laser, which consume the energy of the stray light by multiple reflections of the stray light in the light-collecting groove, thereby preventing the surface temperature of the laser chip from rising and extending the service life of the laser chip.

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

[0005] A laser generating component, comprising a plurality of chips, wherein the chips generate lasers when powered on;

[0006] A laser focusing component, used to focus the laser generated by the chip; and

[0007] At least one light-collecting groove is arranged on the light path transmitted by the laser converging component to absorb stray light transmitted by the laser converging component, and the bottom of the light-collecting groove is a curved surface.

[0008] Optionally, the laser focusing component includes a reflector group and a beam combiner, the reflector group is arranged on the laser light path generated by the chip to reflect the laser generated by the chip into the beam combiner, the beam combiner is used to make the laser light reflected by the reflector group be emitted in one direction, and the at least one light collecting groove includes a first light collecting groove, and the first light collecting groove is arranged on the transmission light path of the beam combiner to absorb stray light transmitted by the beam combiner.

[0009] Optionally, the slot of the first light collecting slot is provided with a first reflective bevel, and the stray light transmitted by the beam combining mirror is irradiated on the first reflective bevel, and the first reflective bevel is used to reflect the stray light transmitted by the beam combining mirror into the first light collecting slot.

[0010] Optionally, the reflector group includes a first reflector and several second reflectors, the second reflectors are arranged on the emission light path of the chip to reflect the laser generated by the chip to the first reflector, the first reflector is arranged on the reflection light path of the second reflector, and the first reflector is used to reflect the laser reflected by the second reflector into the beam combining mirror.

[0011] Optionally, the at least one light-collecting groove includes a second light-collecting groove, and the second light-collecting groove is arranged on the transmission light path of the first reflector to absorb stray light transmitted by the first reflector.

[0012] Optionally, the second light-collecting groove includes a second reflective slope, and the stray light transmitted by the first reflector is irradiated on the second reflective slope, and the second reflective slope is used to reflect the stray light transmitted by the first reflector into the second light-collecting groove.

[0013] Optionally, the laser convergence component also includes an anti-reflection mirror and a focusing mirror. The beam combining mirror reflects the laser light reflected by the reflector group into the focusing mirror. The focusing mirror is used to focus the laser light. The anti-reflection mirror is arranged in the optical path between the beam combining mirror and the focusing mirror to prevent the laser light from being reflected back.

[0014] Optionally, the at least one light-collecting groove further includes a third light-collecting groove, and the third light-collecting groove is arranged on the reflection light path of the anti-reflection mirror to absorb stray light reflected by the anti-reflection mirror.

[0015] Optionally, the third light-collecting groove includes a third reflective bevel, and the stray light reflected by the anti-reflection mirror is irradiated on the third reflective bevel, and the third reflective bevel is used to reflect the stray light reflected by the anti-reflection mirror into the third light-collecting groove.

[0016] The embodiment of the present application also provides a laser, comprising the pump source described above.

[0017] The pump source and the laser provided by the embodiment of the present application have the following beneficial effects: the pump source of the embodiment of the present application generates laser light through the laser generating component and emits the laser light to the laser converging component, and the laser converging component converges the laser light. In the process of converging the laser light, the laser converging component generates stray light, and the stray light is emitted into the light receiving groove and is reflected multiple times in the light receiving groove, thereby reducing the energy of the stray light, preventing the stray light energy reflected to the surface of the core laser chip from being too strong, causing the surface temperature of the laser chip to increase, and extending the service life of the laser chip;

[0018] Since the laser of the embodiment of the present application includes the above-mentioned pump source, it has the beneficial effects brought by the above-mentioned pump source, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 any creative labor.

[0020] Figure 1 Schematic diagram of the internal structure of the pump source provided in an embodiment of the present application.

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

[0022] 1. Laser generating component; 11. Chip;

[0023] 2. Laser focusing assembly; 21. Reflector group; 22. Beam combining mirror; 211. First reflector; 212. Second reflector; 213. Slow axis collimator; 23. Anti-reflection mirror; 24. Focusing mirror;

[0024] 3. Light-collecting groove; 31. First light-collecting groove; 311. First reflecting slope; 32. Second light-collecting groove; 321. Second reflecting slope; 33. Third light-collecting groove; 331. Third reflecting slope. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] See also Figure 1 , the pump source provided in the embodiment of the present application is now described. The pump source provided in the embodiment of the present application includes a laser generating component 1, a laser converging component 2 and at least one light collecting slot 3. The laser generating component 1 includes a plurality of chips 11, and the chip 11 generates lasers after being powered on. The laser converging component 2 is used to converge the lasers generated by the chip 11. The light collecting slot 3 is arranged on the optical path transmitted by the laser converging component 2 to absorb the stray light transmitted by the laser converging component 2, and the bottom of the light collecting slot 3 is an arc surface.

[0030] The laser generating component 1 in the embodiment of the present application includes a plurality of chips 11 connected in series. In addition, the laser generating component 1 may also include a plurality of chips 11 connected in parallel.

[0031] The laser focusing component 2 may include a plurality of reflectors, which reflect the laser generated by the chip 11 in one direction to focus the laser and form a laser beam.

[0032] The laser generating component 1 generates laser and emits it to the laser converging component 2. The laser converging component 2 converges the laser. In the process of converging the laser, the laser converging component 2 generates stray light. The stray light is emitted into the light collecting groove 3 and is reflected multiple times in the light collecting groove 3, thereby reducing the energy of the stray light and preventing the stray light energy reflected to the surface of the core laser chip 11 from being too strong, causing the surface temperature of the laser chip 11 to increase, thereby extending the service life of the laser chip 11.

[0033] The light collecting slot 3 may be a straight slot, and the stray light transmitted by the laser converging component 2 may be directly projected onto the slot wall of the light collecting slot 3, and be reflected multiple times on the slot wall of the light collecting slot 3, thereby reducing the energy of the stray light. The slot bottom of the light collecting slot 3 is an arc surface, which can increase the number of reflections of the stray light in the light collecting slot 3, thereby further reducing the energy of the stray light.

[0034] Preferably, the laser focusing component 2 includes a reflector group 21 and a beam combiner 22, the reflector group 21 is arranged on the laser light path generated by the chip 11 to reflect the laser generated by the chip 11 into the beam combiner 22, the beam combiner 22 is used to make the laser light reflected by the reflector group 21 be emitted in one direction, and the at least one light collecting slot 3 includes a first light collecting slot 313, and the first light collecting slot 313 is arranged on the transmission light path of the beam combiner 22 to absorb the stray light transmitted by the beam combiner 22.

[0035] When the reflector group 21 reflects the laser to the beam combiner 22, part of the stray light will be transmitted through the beam combiner 22 during the process of reflecting the laser. The optical path of the stray light is inconsistent with the integration direction of the beam combiner 22. In order to prevent the stray light transmitted by the beam combiner 22 from affecting the life of the chip 11, a first light collecting groove 313 is arranged in the direction of the optical path of the stray light transmitted by the beam combiner 22. The bottom of the first light collecting groove 313 is an arc surface. The stray light transmitted by the beam combiner 22 can be reflected multiple times in the first light collecting groove 313 to reduce energy.

[0036] The notch of the first light collecting slot 313 is provided with a first reflective bevel 311 , and the stray light transmitted by the beam combining mirror 22 is irradiated on the first reflective bevel 311 . The first reflective bevel 311 is used to reflect the stray light transmitted by the beam combining mirror 22 into the first light collecting slot 313 .

[0037] The first reflecting bevel 311 can reflect the stray light transmitted by the beam combining mirror 22 to the inner wall of the first light collecting groove 313. The stray light transmitted by the beam combining mirror 22 can reach the bottom of the first light collecting groove 313 after multiple reflections on the inner wall of the first light collecting groove 313. The bottom of the first light collecting groove 313 is a curved surface, which can further increase the number of reflections of the stray light transmitted by the beam combining mirror 22. In this way, the energy of the stray light transmitted by the beam combining mirror 22 can be reduced.

[0038] The reflector group 21 includes a first reflector 211 and a plurality of second reflectors 212. The second reflectors 212 are arranged on the emission light path of the chip 11 to reflect the laser generated by the chip 11 to the first reflector 211. The first reflector 211 is arranged on the reflection light path of the second reflector 212. The first reflector 211 is used to reflect the laser reflected by the second reflector 212 into the beam combining mirror 22.

[0039] In order to rationally plan the internal space of the pump source, the embodiment of the present application divides the plurality of chips 11 in the laser generating assembly 1 into a first chip group and a second chip group, wherein the first chip group includes a plurality of first chips connected in series, and the second chip group includes a plurality of second chips connected in series, the first chip group and the second chip group are arranged relatively and connected in series through electrodes, and the first chip and the second chip are arranged staggered. The reflector group 21 is used to reflect the lasers generated by the first chip group and the second chip group into the beam combiner 22, and the beam combiner 22 is used to integrate the laser directions of the two groups of lasers into one direction.

[0040] A plurality of second reflectors 212 can be divided into two groups, and are located between the first chip group and the second chip group, wherein one group of second reflectors 212 is arranged opposite to the first chip group to reflect the laser generated by the first chip group to the beam combining mirror 22, and another group of second reflectors 212 is arranged opposite to the second chip group to reflect the laser generated by the second chip group to the first reflector 211, and the first reflector 211 reflects the laser generated by the second chip group to the beam combining mirror 22. Since the lasers generated by the first chip group and the second chip group are parallel in direction after being reflected by the second reflector 212, the first reflector 211 is required to change the direction of the laser generated by the second chip group so that the direction of the laser generated by the second chip group is perpendicular to the direction of the laser generated by the first chip group, and the beam combining mirror 22 combines the two groups of perpendicular laser beams into one beam.

[0041] The reflector assembly 21 further includes a plurality of slow axis collimators 213 , which correspond one to one with the second reflector 212 . The laser light generated by the chip 11 is irradiated onto the second reflector 212 after passing through the slow axis collimators 213 . The slow axis collimators 213 can adjust and position the laser light beam generated by the chip 11 .

[0042] The at least one light-collecting slot 3 includes a second light-collecting slot 323 . The second light-collecting slot 323 is disposed on the transmission light path of the first reflector 211 to absorb stray light transmitted by the first reflector 211 .

[0043] When the first reflector 211 is reflecting laser light, part of the stray light will be transmitted through the first reflector 211. In order to prevent the stray light transmitted through the first reflector 211 from affecting the life of the chip 11, a second light collecting groove 323 is provided in the direction of the light path of the stray light transmitted through the first reflector 211. The bottom of the second light collecting groove 323 is an arc surface. The stray light transmitted through the first reflector 211 can be reflected multiple times in the second light collecting groove 323 to reduce the energy.

[0044] The second light-collecting slot 323 includes a second reflective slope 321 , and the stray light transmitted by the first reflector 211 is irradiated on the second reflective slope 321 . The second reflective slope 321 is used to reflect the stray light transmitted by the first reflector 211 into the second light-collecting slot 323 .

[0045] The second reflective bevel 321 can reflect the stray light transmitted by the first reflector 211 to the inner side wall of the second light-collecting groove 323. The stray light transmitted by the first reflector 211 can reach the bottom of the second light-collecting groove 323 after multiple reflections on the inner side wall of the second light-collecting groove 323. The bottom of the second light-collecting groove 323 is a curved surface, which can further increase the number of reflections of the stray light transmitted by the first reflector 211. In this way, the energy of the stray light transmitted by the first reflector 211 can be reduced. The second reflective bevel 321 can be set as the inner side wall of the second light-collecting groove 323, or the second light-collecting groove 323 can be set as an inclined straight groove.

[0046] The laser converging assembly 2 also includes an anti-reflection mirror 23 and a focusing mirror 24. The beam combining mirror 22 reflects the laser light reflected by the reflector group 21 into the focusing mirror 24. The focusing mirror 24 is used to focus the laser light. The anti-reflection mirror 23 is arranged in the optical path between the beam combining mirror 22 and the focusing mirror 24 to prevent the laser light from being reflected back.

[0047] After the beam combiner 22 reflects the laser light to the focusing mirror 24, the focusing mirror 24 will converge the laser light and guide it into the optical fiber. During this period, some reverse-reflected laser light will be generated. The laser light will pass through the focusing mirror 24 along the direction of the optical fiber and hit the beam combiner 22. The anti-reflection mirror 23 is used to prevent the laser light in the reverse light path from being reflected onto the beam combiner 22.

[0048] The at least one light-collecting slot 3 further includes a third light-collecting slot 333 . The third light-collecting slot 333 is disposed on the reflection light path of the anti-reflection mirror 23 to absorb stray light reflected by the anti-reflection mirror 23 .

[0049] The reverse-reflected laser will pass through the focusing mirror 24 along the direction of the optical fiber and hit the anti-reflection mirror 23. This part of the reverse-reflected laser is also stray light. The surface of the anti-reflection mirror 23 is coated with a coating that prevents special wavelengths and will reflect the reverse-reflected laser light. In order to prevent the reverse-reflected laser light from affecting the life of the chip 11, a third light-collecting groove 333 is arranged in the optical path direction of the stray light reflected by the anti-reflection mirror 23. The bottom of the third light-collecting groove 333 is an arc surface, and the stray light can be reflected multiple times in the third light-collecting groove 333 to reduce energy.

[0050] The third light-collecting slot 333 includes a third reflective bevel 331 , and the stray light reflected by the anti-reflection mirror 23 is irradiated on the third reflective bevel 331 . The third reflective bevel 331 is used to reflect the stray light reflected by the anti-reflection mirror 23 into the third light-collecting slot 333 .

[0051] The third reflective bevel 331 can reflect the stray light reflected by the anti-reflection mirror 23 to the inner side wall of the third light-collecting groove 333. The stray light reflected by the anti-reflection mirror 23 can reach the bottom of the third light-collecting groove 333 after multiple reflections on the inner side wall of the third light-collecting groove 333. The bottom of the third light-collecting groove 333 is a curved surface, which can further increase the number of reflections of the stray light reflected by the anti-reflection mirror 23. In this way, the energy of the stray light reflected by the anti-reflection mirror 23 can be reduced. The third reflective bevel 331 can be set as the inner side wall of the third light-collecting groove 333, or the third light-collecting groove 333 can be set as an inclined straight groove.

[0052] The embodiment of the present application also provides a laser, comprising the pump source described above.

[0053] Since the laser of the embodiment of the present application includes the pump source in any of the above embodiments, it has the beneficial effects brought by the pump source in any of the above embodiments, which will not be described in detail here.

[0054] 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 pump source, characterized in that: include: A laser generating component, comprising a plurality of chips, wherein the chips generate lasers when powered on; A laser focusing component, used to focus the laser generated by the chip; and At least one light-collecting groove is arranged on the light path transmitted by the laser converging component to absorb stray light transmitted by the laser converging component, and the bottom of the light-collecting groove is a curved surface.

2. The pump source according to claim 1, characterized in that: The laser focusing component includes a reflector group and a beam combiner. The reflector group is arranged on the laser light path generated by the chip to reflect the laser generated by the chip into the beam combiner. The beam combiner is used to make the laser light reflected by the reflector group be emitted in one direction. The at least one light collecting groove includes a first light collecting groove. The first light collecting groove is arranged on the transmission light path of the beam combiner to absorb stray light transmitted by the beam combiner.

3. The pump source according to claim 2, characterized in that: The notch of the first light collecting slot is provided with a first reflective bevel, and the stray light transmitted by the beam combining mirror is irradiated on the first reflective bevel. The first reflective bevel is used to reflect the stray light transmitted by the beam combining mirror into the first light collecting slot.

4. The pump source according to claim 2, characterized in that: The reflector group includes a first reflector and a plurality of second reflectors, wherein the second reflectors are arranged on the emission light path of the chip to reflect the laser generated by the chip to the first reflector, and the first reflector is arranged on the reflection light path of the second reflector, and the first reflector is used to reflect the laser reflected by the second reflector into the beam combining mirror.

5. The pump source according to claim 4, characterized in that: The at least one light-collecting slot includes a second light-collecting slot, and the second light-collecting slot is arranged on the transmission light path of the first reflector to absorb stray light transmitted by the first reflector.

6. The pump source according to claim 5, characterized in that: The second light-collecting groove includes a second reflective slope, and the stray light transmitted by the first reflector is irradiated on the second reflective slope. The second reflective slope is used to reflect the stray light transmitted by the first reflector into the second light-collecting groove.

7. The pump source according to any one of claims 2 to 6, characterized in that: The laser converging component also includes an anti-reflection mirror and a focusing mirror. The beam combining mirror reflects the laser light reflected by the reflector group into the focusing mirror. The focusing mirror is used to focus the laser light. The anti-reflection mirror is arranged in the light path between the beam combining mirror and the focusing mirror to prevent the laser light from being reflected back.

8. The pump source according to claim 7, characterized in that: The at least one light-collecting slot further includes a third light-collecting slot, and the third light-collecting slot is arranged on the reflection light path of the anti-reflection mirror to absorb stray light reflected by the anti-reflection mirror.

9. The pump source according to claim 8, characterized in that: The third light-collecting groove comprises a third reflective bevel, and the stray light reflected by the anti-reflection mirror is irradiated on the third reflective bevel. The third reflective bevel is used to reflect the stray light reflected by the anti-reflection mirror into the third light-collecting groove.

10. A laser, characterized in that: The pump source comprises any one of claims 1 to 9.

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