Pump source and laser

Abstract

The application provides a pumping source and a laser, wherein the pumping source comprises a base, a first laser generating module for emitting a first laser beam, a second laser generating module for emitting a second laser beam, a transition jumper, a first focusing lens and a second focusing lens, the base is provided with a packaging groove, a light output jumper is provided through a side wall of the base, the light output jumper has a first receiving end for receiving the laser beam, the transition jumper comprises a second receiving end and an output end connected with the second receiving end and facing the first receiving end, the first focusing lens faces the first receiving end, the second focusing lens faces the second receiving end, the second laser beam is coupled into the second receiving end and then emitted from the output end, and the first focusing lens is used for focusing and coupling the first laser beam and the second laser beam into the first receiving end. The first laser beam is output in the form of a point light source through the transition jumper, so that the possibility that the laser beam deviates or partially deviates from the core of the light output jumper can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and more specifically, to a pump source and a laser having the pump source. Background Technology

[0002] 2.0μm wavelength lasers (1904–2040nm) have wide applications in fields such as bioimaging, laser medicine, polymer laser welding and processing, and micro-measurement of organic matter, and have become one of the hot topics in laser source research both domestically and internationally in recent years. The working process of such lasers generally involves first generating laser light through several to hundreds of COS (Chipon Submount, laser chip), then optically shaping and combining the beam, followed by focusing by a focusing lens to form a very fine spot beam, which is then directly projected onto the fiber core at an angle that the fiber can receive. The beam then propagates within the fiber and is output from the other end.

[0003] However, in the existing fabrication and application of high-power semiconductor lasers, the core diameter of the optical fiber is relatively small, typically several hundred micrometers or smaller, making it difficult to align the projected beam with the incident end of the fiber core. This can easily lead to the projected beam deviating from the fiber core. Therefore, when using thin optical fibers to perform fiber coupling to high-power semiconductor lasers, the projected beam is prone to deviating or partially deviating from the incident end of the fiber core.

[0004] For commonly used 2.0μm band lasers, the pump source is typically a pump source with a working wavelength of 793nm. The COS of this pump source has a large emission area and a large divergence angle, making it very difficult to couple this laser into an optical fiber with a very small core diameter. Summary of the Invention

[0005] The purpose of this invention is to provide a pump source and laser to solve the technical problem in the prior art where lasers emitted by multiple COS are coupled into an optical fiber with a very small core diameter, and the laser is easily deflected or partially deflected into the fiber core.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a pump source is provided, comprising: a base, wherein the base is provided with an encapsulation groove;

[0008] An optical output jumper is disposed on the side wall of the base, and the optical output jumper has a first receiving end disposed in the encapsulation slot for receiving a laser beam;

[0009] A first laser generating module is disposed within the encapsulation slot and is used to emit a first laser beam;

[0010] The second laser generating module is located inside the encapsulation slot and is used to emit a second laser beam;

[0011] A transition jumper is disposed within the encapsulation slot. The transition jumper includes a second receiving end and an output end connected to the second receiving end and facing the first receiving end.

[0012] A first focusing lens is disposed in the encapsulation groove, located in the optical path of the first laser beam and facing the first receiving end;

[0013] The second focusing lens is disposed in the encapsulation groove, located in the optical path of the second laser beam and facing the second receiving end, and is used to receive the second laser beam and couple the second laser beam into the second receiving end;

[0014] The second laser beam is coupled into the second receiving end and then emitted from the output end, and enters the first focusing lens. The first focusing lens is used to focus and couple the first laser beam and the second laser beam into the first receiving end.

[0015] By adopting the above technical solution, the second laser generating module emits a second laser beam, which is coupled to the second receiving end of the transition jumper through the second focusing lens. Since the cross-sectional size of the output end is small, equivalent to a point visible to the naked eye, the second laser beam will be output from the output end as a point light source after passing through the transition jumper. Then, it converges with the first laser beam emitted by the first laser generating module. The first focusing lens couples the first and second laser beams into the first receiving end, and finally, the coupled laser beam is output through the optical output jumper. Compared with the method of directly coupling two laser beams through a lens in related technologies, the spot area of ​​the laser beam in related technologies is larger. However, in this invention, the first laser beam is output as a point light source through the transition jumper. The spot area of ​​the laser beam emitted by this point light source is smaller than that of the laser beam, which facilitates its convergence and coupling with the second laser beam into the first receiving end. This can effectively reduce the possibility of the laser beam deviating or partially deviating from the fiber core of the optical output jumper.

[0016] In one embodiment, the pump source further includes a first reflection component, which is disposed in the optical path between the first laser generating module and the first focusing lens, and is used to deflect the first laser beam into the first focusing lens.

[0017] By adopting the above technical solution, the first reflection component can deflect the optical path of the first laser beam emitted by the first laser generating module by a certain angle, thereby changing the optical path of the first laser beam so that the pump source can be designed with optical structure based on different optical paths.

[0018] In one embodiment, the pump source further includes a second reflection component, which is disposed in the optical path between the second laser generating module and the second focusing lens, and is used to deflect the second laser beam into the second focusing lens.

[0019] By adopting the above technical solution, the second reflection component can deflect the optical path of the second laser beam emitted by the second laser generating module by a certain angle, thereby changing the optical path of the second laser beam so that the pump source can be designed with optical structure based on different optical paths.

[0020] In one embodiment, taking the plane containing the bottom of the encapsulation slot as the XY plane, the second laser generating module includes multiple laser emitting units, multiple fast-axis collimating lenses, multiple slow-axis collimating lenses, multiple Bragg gratings, and multiple reflectors. Each laser emitting unit is located on the same straight line in the X-axis direction as a corresponding fast-axis collimating lens, a slow-axis collimating lens, a Bragg grating, and a reflector. The optical axes of the fast-axis collimating lens, the slow-axis collimating lens, and the Bragg grating coincide and are aligned with the emitting surface of the corresponding laser emitting unit. All the laser emitting units are staggered in height in the Z-axis direction, and all the reflectors are located on the same straight line in the Y-axis direction and staggered in height in the Z-axis direction.

[0021] By adopting the above technical solution, the second laser beam emitted by the second laser generating module is collimated in the fast axis direction by a fast-axis collimating lens, then collimated in the slow axis direction by a slow-axis collimating lens, then its wavelength is locked by a Bragg grating, and finally reflected by a mirror to the second focusing lens for coupling. The model, specifications and positional relationship of each fast-axis collimating lens, each slow-axis collimating lens, each Bragg grating and each mirror can be customized according to different laser output requirements to achieve a laser output that meets the design requirements.

[0022] In one embodiment, the pump source further includes a polarization beam combiner, which is disposed in the optical path between the second laser generating module and the second focusing lens. The polarization beam combiner is used to combine multiple collimated parallel beams emitted by multiple laser emitting units into a single collimated parallel beam.

[0023] By adopting the above technical solution, the polarization beam combiner can combine multiple collimated parallel beams emitted by multiple laser light-emitting units into a single collimated parallel beam, so as to convert multiple parallel beams into a single collimated parallel beam and then couple it to the second receiving end through the second focusing lens.

[0024] In one embodiment, the plane where the bottom of the encapsulation slot is located is the XY plane. The first laser generating module and the second laser generating module are arranged opposite each other with a straight line parallel to the Y-axis as the axis of symmetry. The first receiving end, the first focusing lens, the second focusing lens, the second receiving end, and the output end are located on the same straight line in the X-axis direction, and the optical axis of the first receiving end, the optical axis of the first focusing lens, the optical axis of the second focusing lens, the optical axis of the second receiving end, and the optical axis of the output end coincide.

[0025] By adopting the above technical solution, the first laser generating module and the second laser generating module are arranged opposite each other with a straight line parallel to the Y-axis as the axis of symmetry. The first receiving end, the first focusing lens, the second focusing lens, the second receiving end, and the output end are located on the same straight line in the X-axis direction. This allows the other optical components arranged on the same straight line in the X-axis direction of the first and second laser generating modules to be close together without forming gaps due to their angled arrangement. This makes the structure of the pump source more compact and helps to reduce the design size of the pump source.

[0026] In one embodiment, the pump source further includes a connector that passes through the side wall of the base and is electrically connected to the first laser generating module and the second laser generating module. The connector is used to transmit electrical signals from external devices to the first laser generating module and the second laser generating module.

[0027] By adopting the above technical solution, the connector electrically connects the external power supply device to the first laser generating module and the second laser generating module, enabling the external power supply device to supply power to the first laser generating module and the second laser generating module, thereby ensuring that the first laser generating module and the second laser generating module can work normally.

[0028] In one embodiment, the core diameter of the transition jumper is smaller than the core diameter of the optical output jumper.

[0029] By adopting the above technical solution, the transition jumper has a small core diameter, which makes the laser beam output from it smaller in size. The optical output jumper has a large core diameter, which helps it receive the laser beam output from the transition jumper. This can effectively reduce the possibility that the laser beam output from the transition jumper may deviate from or partially deviate from the core of the optical output jumper.

[0030] In one embodiment, the pump source operates at a wavelength of 793nm and has an output power of 60W-90W.

[0031] In a second aspect, a laser is provided, comprising a laser gain medium, a resonant cavity, and a pump source as described in any of the above technical solutions, wherein the pump source is used to excite the laser gain medium, the laser gain medium is used to receive radiation from the pump source and emit photons, and the resonant cavity is used to amplify the photons emitted by the laser gain medium to output continuous laser or pulsed laser.

[0032] By adopting the above technical solution, the laser made using the pump source provided in this embodiment can achieve high-power laser output from a small-diameter fiber core jumper, and the laser coupling effect is good, and the laser output is stable. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a three-dimensional structural diagram of the pump source provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the pump source provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the optical path of the rotating seat provided in an embodiment of the present invention;

[0037] Figure 4 This is a top view of the pump source provided in an embodiment of the present invention;

[0038] Figure 5 yes Figure 4 Sectional view of the cross section at point AA.

[0039] The figures are labeled as follows: 100, pump source; 1, base; 2, first laser generating module; 3, second laser generating module; 4, transition jumper; 5, first focusing lens; 6, second focusing lens; 7, first reflection assembly; 8, second reflection assembly; 9, polarization combiner; 10, connector.

[0040] 11. Encapsulation slot; 12. Optical output jumper; 13. Cover plate; 31. Laser emission unit; 32. Fast axis collimating lens; 33. Slow axis collimating lens; 34. Bragg grating; 35. Reflector; 41. Second receiver; 42. Output terminal;

[0041] 101. First glass insulator; 102. Second glass insulator; 121. First receiving end. Detailed Implementation

[0042] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0043] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this invention will be described in more detail below with reference to specific embodiments:

[0046] like Figures 1 to 3 As shown ( Figure 3 (The arrow shown indicates the propagation direction of the laser beam). An embodiment of the present invention provides a pump source 100, which includes a base 1, a first laser generating module 2, a second laser generating module 3, a transition jumper 4, a first focusing lens 5, and a second focusing lens 6.

[0047] The base 1 is provided with a sealing groove 11;

[0048] The optical output jumper 12 is disposed on the side wall of the base 1, and the optical output jumper 12 has a first receiving end 121 disposed in the encapsulation groove 11 and used to receive the laser beam;

[0049] The first laser generating module 2 is located in the encapsulation slot 11 and is used to emit the first laser beam;

[0050] The second laser generating module 3 is located in the encapsulation slot 11 and is used to emit the second laser beam;

[0051] Transition jumper 4, disposed within the encapsulation slot 11, includes a second receiving end 41 and an output end 42 connected to the second receiving end 41 and facing the first receiving end 121; understandably, transition jumper 4 As a fiber optic patch cord, it can be bent according to design requirements to facilitate the wiring of the patch cord 4 within the encapsulation slot 11. Specifically, this embodiment does not limit the position of the second receiving end 41 and the output end 42 within the encapsulation slot 11. The second receiving end 41 and the output end 42 can be arranged on the same plane or on different planes. Specifically, the second receiving end 41 and the output end 42 can be arranged opposite each other on the same plane, and the ports of the second receiving end 41 and the output end 42 have the same orientation; the second receiving end 41 and the output end 42 can also be arranged opposite each other on the same plane, and the ports of the second receiving end 41 and the output end 42 have opposite orientations; similarly, the second receiving end 41 and the output end 42 can be located on different planes, and the ports of the second receiving end 41 and the output end 42 can have the same or opposite orientations. The specific arrangement method can be selected according to the actual optical path design principle. However, regardless of the arrangement, the transition jumper 4 can be bent according to the actual design requirements to connect the second receiving end 41 and the output end 42 located at different positions, thereby enabling the laser beam coupled at the second receiving end 41 to be delivered to the output end 42 for output.

[0052] The first focusing lens 5 is disposed in the encapsulation groove 11, located in the optical path of the first laser beam and facing the first receiving end 121; specifically, the first focusing lens 5 is fixedly connected to the base 1 by UV3410 adhesive.

[0053] The second focusing lens 6 is disposed in the encapsulation groove 11, located in the optical path of the first laser beam and facing the second receiving end 41, and is used to receive the second laser beam and couple the second laser beam into the second receiving end 41; specifically, the second focusing lens 6 is glued and fixedly connected to the base 1 by UV3410 adhesive.

[0054] The second laser beam is coupled into the second receiving end 41 and then emitted from the output end 42, entering the first focusing lens 5. The first focusing lens 5 is used to focus and couple the first laser beam and the second laser beam into the first receiving end 121. Understandably, the cross-sectional diameter of the second receiving end 41 can be relatively large to facilitate the reception and coupling of the second laser beam, while the cross-sectional diameter of the output end 42 should be smaller than that of the second receiving end 41 so that the second laser beam can be output from the output end 42 as a point light source.

[0055] By adopting the above technical solution, the second laser generating module 3 emits a second laser beam, which is coupled to the second receiving end 41 of the transition jumper 4 through the second focusing lens 6. Since the cross-sectional size of the output end 42 is small, equivalent to a point visible to the naked eye, the second laser beam will be output from the output end 42 as a point light source after passing through the transition jumper 4. Then it converges with the first laser beam emitted by the first laser generating module 2. The first focusing lens 5 couples the first laser beam and the second laser beam into the first receiving end 121. Finally, the coupled laser beam is output through the optical output jumper 12. Compared with the method of directly coupling two laser beams through a lens in related technologies, the spot area of ​​the laser beam in related technologies is larger. However, in this embodiment, the first laser beam is output as a point light source through the transition jumper 4. The spot area of ​​the laser beam emitted by this point light source is smaller than that of the laser beam, which facilitates its convergence and coupling with the second laser beam into the first receiving end 121. This can effectively reduce the possibility of the laser beam deviating or partially deviating from the fiber core of the optical output jumper 12.

[0056] like Figure 2 As shown, in one optional implementation of this embodiment, the pump source 100 further includes a first reflecting component 7. The first reflecting component 7 is disposed in the optical path between the first laser generating module 2 and the first focusing lens 5. The first reflecting component 7 is used to deflect the first laser beam into the first focusing lens 5. Specifically, the first reflecting component 7 can be a plane mirror or a prism capable of changing the optical path, and there is no limitation here. More specifically, in this embodiment, the first reflecting component 7 is preferably a right-angle prism with two mutually perpendicular sides, wherein one right-angle side is the light-incident surface and the other right-angle side is the light-exit surface. This right-angle prism can deflect the optical path of the first laser beam by 90°.

[0057] By adopting the above technical solution, the first reflection component 7 can deflect the optical path of the first laser beam emitted by the first laser generating module 2 by a certain angle, thereby changing the optical path of the first laser beam so that the pump source 100 can be designed with optical structure based on different optical paths.

[0058] like Figure 2 As shown, in one optional implementation of this embodiment, the pump source 100 further includes a second reflecting component 8. The second reflecting component 8 is disposed in the optical path between the second laser generating module 3 and the second focusing lens 6. The second reflecting component 8 is used to deflect the second laser beam into the second focusing lens 6. Specifically, the second reflecting component 8 can be a plane mirror or a prism capable of changing the optical path, without limitation. More specifically, the second reflecting component 8 is preferably a right-angle prism with two mutually perpendicular sides, wherein one right-angle side is the incident light surface and the other right-angle side is the exit light surface. This right-angle prism can deflect the optical path of the second laser beam by 90°.

[0059] By adopting the above technical solution, the second reflection component 8 can deflect the optical path of the second laser beam emitted by the second laser generating module 3 by a certain angle, thereby changing the optical path of the second laser beam so that the pump source 100 can be designed with optical structure based on different optical paths.

[0060] like Figure 3 As shown, in one optional implementation of this embodiment, taking the plane where the bottom of the encapsulation groove 11 is located as the XY plane, the second laser generating module 3 includes multiple laser emitting units 31, multiple fast-axis collimating lenses 32, multiple slow-axis collimating lenses 33, multiple Bragg gratings 34, and multiple reflectors 35. Each laser emitting unit 31 is located on the same straight line in the X-axis direction with a corresponding fast-axis collimating lens 32, a slow-axis collimating lens 33, a Bragg grating 34, and a reflector 35. The optical axes of the fast-axis collimating lens 32, the slow-axis collimating lens 33, and the Bragg grating 34 coincide and are aligned with the emitting surface of the corresponding laser emitting unit 31. All the laser emitting units 31 are staggered in height in the Z-axis direction. In other words, the laser emitting units 31 do not present a row-by-row structure, but are staggered with each other. Moreover, the laser emitting units 31 are not all or partly located at the same height, but each has a different height, thereby achieving that the beams emitted by the laser emitting units 31 do not interfere with each other when emitted in the same direction. All the reflectors 35 are located on the same straight line in the Y-axis direction and are staggered in height in the Z-axis direction. Similarly, all the reflectors 515 are staggered in height, that is, each reflector 515 corresponds to each laser emitting unit 31, so as to deflect the laser beam emitted by each laser emitting unit 31.

[0061] Understandably, the arrangement positions and optical path structures of the components included in the first laser generating module 2 can be the same as or different from those of the components included in the second laser generating module 3. In this embodiment, it is preferable that the arrangement positions and optical path structures of the components included in the first laser generating module 2 are the same as those of the components included in the second laser generating module 3. Specifically, in order to improve the convergence effect of the first laser beam and the second laser beam, and to make the arrangement of the components of the packaging structure more compact, the first laser generating module 2 and the second laser generating module 3 are arranged centrally symmetrically in the Y-axis direction.

[0062] Understandably, this embodiment does not limit the type of laser light-emitting unit 511. The laser light-emitting unit 511 can be a COS or a semiconductor laser diode. In this embodiment, the laser light-emitting unit 511 is preferably a COS.

[0063] Understandably, the fast-axis collimating lens 32 is suitable for receiving the laser emitted by the laser emitting unit 31, converting the laser into a first parallel beam along the fast axis direction, and outputting the first parallel beam. Specifically, the fast-axis collimating lens 32 is an aspherical lens or a cemented doublet with spherical aberration correction function. Understandably, the slow-axis collimating lens 33 is suitable for receiving the first parallel beam and converting the first parallel beam into a second parallel beam along the slow axis direction. The slow-axis collimating lens 33 is an aspherical lens or a cemented doublet with spherical aberration correction function. The spherical aberration correction function can simultaneously eliminate spherical aberration and coma aberration, thereby further improving beam quality.

[0064] Understandably, the volume Bragg grating 34 can feed a portion of the incident laser back to the source region of the laser emitting unit 31 along the original incident light path, thereby locking the output wavelength of the laser emitting unit 31 and achieving narrow spectrum output of the laser.

[0065] like Figure 4 , Figure 5 In the illustrated embodiment, it can be understood that all the laser emitting units 31 are staggered in height along the Z-axis, such that the laser beams emitted by each laser emitting unit 31 are at different heights and staggered in the XY plane. Preferably, the height of all the laser emitting units 31 decreases sequentially along the Z-axis, so that the beams emitted by all the laser emitting units 31 do not interfere with each other when emitted in the same direction. Specifically, as shown... Figure 5 As shown, the base 1 has steps of varying heights, and each laser light-emitting unit 31 is arranged on one of the steps. The laser light-emitting units 31 are transformed from a simple planar arrangement to a three-dimensional spatial arrangement, thereby ensuring that all laser light-emitting units 31 are arranged in a three-dimensional tower shape within the encapsulation groove 11. This also ensures that the optical paths of each laser light-emitting unit 31 are staggered in the Z-axis direction, making each optical path independent and avoiding interference. More specifically, the laser light-emitting units 31 are soldered and fixed to the base 1 using SnAgCu solder.

[0066] Understandably, all the reflectors 35 are located on the same straight line in the Y-axis direction and are staggered in height in the Z-axis direction. The fact that all the reflectors 35 are located on the same straight line in the Y-axis direction allows the light paths of each reflector 35 to converge in the same straight line direction. The fact that all the reflectors 35 are staggered in height in the Z-axis direction allows the light paths reflected by each reflector 35 to be independent of each other, avoiding interference.

[0067] Specifically, the fast-axis collimating lens 32, the slow-axis collimating lens 33, the Bragg grating 34, and the reflecting mirror 35 are glued to the base 1 using UV3410 adhesive.

[0068] By adopting the above technical solution, the second laser beam emitted by the second laser generating module 3 is collimated in the fast axis direction by the fast axis collimating lens 32, then collimated in the slow axis direction by the slow axis collimating lens 33, then its wavelength is locked by the Bragg grating 34, and finally reflected by the reflector 35 to the second focusing lens 6 for coupling. The model specifications and positional relationship of each fast axis collimating lens 32, each slow axis collimating lens 33, each Bragg grating 34 and each reflector 35 can be customized according to different laser output requirements to achieve the output of laser that meets the design requirements.

[0069] As one of the optional implementations of this embodiment, the pump source 100 further includes a polarization beam combiner 9, which is disposed in the optical path between the second laser generating module 3 and the second focusing lens 6. The polarization beam combiner 9 is used to combine multiple collimated parallel beams emitted by multiple laser emitting units 31 into a collimated parallel beam.

[0070] By adopting the above technical solution, the polarization beam combiner 9 can combine multiple collimated parallel beams emitted by multiple laser light-emitting units 31 into a single collimated parallel beam, so as to convert multiple parallel beams into a single collimated parallel beam and then couple it into the second receiving end 41 through the second focusing lens 6.

[0071] In one optional implementation of this embodiment, the plane containing the bottom of the encapsulation groove 11 is taken as the XY plane. The first laser generating module 2 and the second laser generating module 3 are arranged opposite each other with a straight line parallel to the Y-axis as the axis of symmetry. The first receiving end 121, the first focusing lens 5, the second focusing lens 6, the second receiving end 41, and the output end 42 are located on the same straight line in the X-axis direction, and the optical axes of the first receiving end 121, the first focusing lens 5, the second focusing lens 6, the second receiving end 41, and the output end 42 coincide. It can be understood that the square structure is more compact, which is beneficial for realizing the miniaturization of the pump source 100.

[0072] By adopting the above technical solution, the first laser generating module 2 and the second laser generating module 3 are arranged opposite each other with a straight line parallel to the Y-axis as the axis of symmetry. The first receiving end 121, the first focusing lens 5, the second focusing lens 6, the second receiving end 41, and the output end 42 are located on the same straight line in the X-axis direction. This allows the other optical components arranged on the same straight line in the X-axis direction as the first laser generating module 2 and the second laser generating module 3 to be close together without forming any gaps due to their angled arrangement. This makes the structure of the pump source 100 more compact and helps to reduce the design size of the pump source 100.

[0073] In one optional embodiment of this invention, the pump source 100 further includes a connector 10, which is disposed on the side wall of the base 1. The connector 10 is electrically connected to the first laser generating module 2 and the second laser generating module 3, and is used to transmit electrical signals from external devices to the first laser generating module 2 and the second laser generating module 3. Specifically, the connector 10 includes a first glass insulator 101 and a second glass insulator 102; Figure 2 and Figure 3 Taking the illustrated embodiment as an example, both the first glass insulator 101 and the second glass insulator 102 are composed of an outer glass insulating layer and a wire arranged inside it. One end of the wire extends to be electrically connected to each laser light-emitting unit 31, and the other end of the wire is connected to an external power supply device so that the external power supply device can supply power to each laser light-emitting unit 31, thereby enabling each laser light-emitting unit 31 to work normally.

[0074] By adopting the above technical solution, the connector 10 electrically connects the external power supply device to the first laser generating module 2 and the second laser generating module 3, so that the external power supply device can supply power to the first laser generating module 2 and the second laser generating module 3, thereby ensuring that the first laser generating module 2 and the second laser generating module 3 can work normally.

[0075] As one of the optional implementations of this embodiment, the core diameter of the transition jumper 4 is smaller than the core diameter of the optical output jumper 12.

[0076] By adopting the above technical solution, the fiber core diameter of the transition jumper 4 is small, resulting in a smaller laser spot size. The fiber core diameter of the optical output jumper 12 is large, which helps it receive the laser output from the transition jumper 4. This effectively reduces the possibility that the laser beam output from the transition jumper 4 may deviate from or partially deviate from the fiber core of the optical output jumper 12.

[0077] As one of the optional implementations of this embodiment, the pump source 100 has an operating wavelength of 793nm and an output power of 60W-90W.

[0078] The pump source 100 provided in this embodiment is suitable for fields such as medical treatment and plastic welding. 2μm lasers are a type of laser commonly used in fields such as medical treatment and plastic welding. The pump source required to make a 2μm laser is a pump source with a working wavelength of 793nm. The pump source 100 provided in this embodiment can couple the laser beam into a 105 / 125 fiber. Currently, the power of 793nm pump sources outputting from 105 / 125 fibers on the market is basically around 30W, while the power of the pump source 100 provided in this embodiment can reach 60W to 90W.

[0079] As one of the optional implementations of this embodiment, the encapsulation groove 11 is provided with a cover plate 13, which is connected to the base 1 to seal the encapsulation groove 11, so that each optical component placed in the encapsulation groove 11 is in a sealed environment within the encapsulation groove 11, thus avoiding interference from external light sources to the operation of each optical component within the encapsulation groove 11.

[0080] This embodiment also provides a laser, including a laser gain medium, a resonant cavity, and a pump source 100 of any of the above embodiments. The pump source 100 can be the structure of any of the above embodiments and has the beneficial effects described in any of the above embodiments. The pump source 100 is used to excite the laser gain medium, the laser gain is used to receive the radiation from the pump source and emit photons, and the resonant cavity is used to amplify the photons emitted by the laser gain medium to output continuous laser or pulsed laser.

[0081] By adopting the above technical solution, the laser made using the pump source 100 provided in this embodiment can achieve high-power laser output from a small-diameter fiber core jumper, and the laser coupling effect is good, and the laser output is stable.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pump source, characterized in that, include: The base has an encapsulation groove. An optical output jumper is disposed on the side wall of the base, and the optical output jumper has a first receiving end disposed in the encapsulation slot for receiving a laser beam; A first laser generating module is disposed within the encapsulation slot and is used to emit a first laser beam; The second laser generating module is located inside the encapsulation slot and is used to emit a second laser beam; A transition jumper is disposed within the encapsulation slot. The transition jumper includes a second receiving end and an output end connected to the second receiving end and facing the first receiving end. The cross-sectional diameter of the output end is smaller than that of the second receiving end, so that the second laser beam is output from the output end in the form of a point light source. A first focusing lens is disposed in the encapsulation groove, located in the optical path of the first laser beam and facing the first receiving end; The second focusing lens is disposed in the encapsulation groove, located in the optical path of the second laser beam and facing the second receiving end, and is used to receive the second laser beam and couple the second laser beam into the second receiving end; The second laser beam is coupled into the second receiving end and then emitted from the output end, and enters the first focusing lens. The first focusing lens is used to focus and couple the first laser beam and the second laser beam into the first receiving end.

2. The pump source as described in claim 1, characterized in that, The pump source further includes a first reflection component, which is disposed in the optical path between the first laser generating module and the first focusing lens. The first reflection component is used to deflect the first laser beam into the first focusing lens.

3. The pump source as described in claim 1, characterized in that, The pump source further includes a second reflection component, which is disposed in the optical path between the second laser generating module and the second focusing lens. The second reflection component is used to deflect the second laser beam into the second focusing lens.

4. The pump source as described in claim 1, characterized in that, Taking the plane containing the bottom of the encapsulation slot as the XY plane, the second laser generating module includes multiple laser emitting units, multiple fast-axis collimating lenses, multiple slow-axis collimating lenses, multiple Bragg gratings, and multiple reflectors. Each laser emitting unit is located on the same straight line in the X-axis direction as a corresponding fast-axis collimating lens, a slow-axis collimating lens, a Bragg grating, and a reflector. The optical axes of the fast-axis collimating lens, the slow-axis collimating lens, and the Bragg grating coincide and are aligned with the emitting surface of the corresponding laser emitting unit. All the laser emitting units are staggered in height in the Z-axis direction, and all the reflectors are located on the same straight line in the Y-axis direction and staggered in height in the Z-axis direction.

5. The pump source as described in claim 4, characterized in that, The pump source also includes a polarization beam combiner, which is disposed in the optical path between the second laser generating module and the second focusing lens. The polarization beam combiner is used to combine multiple collimated parallel beams emitted by multiple laser emitting units into a single collimated parallel beam.

6. The pump source as described in claim 1, characterized in that, Taking the plane where the bottom of the encapsulation slot is located as the XY plane, the first laser generating module and the second laser generating module are arranged opposite each other with a straight line parallel to the Y-axis as the axis of symmetry. The first receiving end, the first focusing lens, the second focusing lens, the second receiving end and the output end are located on the same straight line in the X-axis direction, and the optical axis of the first receiving end, the optical axis of the first focusing lens, the optical axis of the second focusing lens, the optical axis of the second receiving end and the optical axis of the output end coincide.

7. The pump source as described in claim 1, characterized in that, The pump source also includes a connector that passes through the side wall of the base and is electrically connected to the first laser generating module and the second laser generating module. The connector is used to transmit electrical signals from external devices to the first laser generating module and the second laser generating module.

8. The pump source as described in claim 1, characterized in that, The core diameter of the transition jumper is smaller than that of the optical output jumper.

9. The pump source as described in claim 1, characterized in that, The pump source operates at a wavelength of 793nm and has an output power of 60W-90W.

10. A laser, characterized in that, The system includes a laser gain medium, a resonant cavity, and a pump source as described in any one of claims 1 to 9, wherein the pump source is used to excite the laser gain medium, the laser gain is used to receive radiation from the pump source and emit photons, and the resonant cavity is used to amplify the photons emitted by the laser gain medium to output continuous laser or pulsed laser.

Images