Multi-pigtail laser output pumping source

Abstract

The invention discloses a multi-pigtail laser output pumping source. The multi-pigtail laser output pumping source comprises a pumping light module, a shaping assembly and a plurality of coupling optical fibers, wherein the pump light module is used for outputting a single collimated light beam; the shaping assembly is arranged on an output light path of the collimated light beam and comprises a focus lens and a beam splitting element which are arranged in sequence, the beam splitting element is used for splitting the focused collimated light beam to form multiple sub-light beams and outputting the sub-light beams, and the sub-light beams are respectively coupled into the corresponding coupling optical fibers after being emitted from the beam splitting element. According to the pumping source provided by the invention, multi-beam output of a single pumping source is realized through the beam splitting element; and moreover, the light beams output by the pumping source are subjected to beam splitting treatment, so that light spots of the light beams received by each coupling optical fiber are smaller, the light density is increased, and the brightness of each final output light beam is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of laser technology, and in particular to a multi-pigtail laser output pump source. Background Art

[0002] Semiconductor lasers have the advantages of small size, high efficiency, long life, wide wavelength range and stable output, so they are widely used in many fields such as laser cutting, laser welding, laser marking, laser medical treatment, laser radar, laser weapons, etc. With the continuous development of semiconductor laser technology, the research on multi-channel output semiconductors has increased in recent years.

[0003] In the prior art, the solution for splitting the laser beam emitted by a semiconductor laser is usually to use a polychromatic mirror or a diffraction grating. However, the above solutions have the following disadvantages: the polychromatic mirror has high requirements on the laser band accuracy, and the high-precision diffraction grating is expensive and not suitable for industrial semiconductor lasers. The use of lower-cost transmission gratings and reflection gratings has large energy losses.

[0004] Therefore, in view of the above problems of laser beam splitting of pump sources in the prior art, it is necessary to design a multi-pigtailed fiber laser output pump source. Summary of the invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a multi-pigtailed laser output pump source to solve the problems of high cost and low precision caused by the use of polychromatic mirrors or diffraction gratings for laser beam splitting in the prior art.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a multi-pigtail laser output pump source, comprising:

[0007] A pump light module, used to output a single collimated light beam;

[0008] A shaping component is arranged on the output optical path of the collimated light beam, and the shaping component includes a focusing mirror and a beam splitting element which are arranged in sequence, and the beam splitting element is used to split the focused collimated light beam to form multiple sub-beams and output them; and

[0009] A plurality of coupling optical fibers, each sub-beam is coupled to a corresponding coupling optical fiber after being emitted from the beam splitting element.

[0010] As a preferred solution, the beam splitting element includes a plurality of identical sub-lenses arranged in a predetermined shape, and the number of coupling optical fibers is consistent with the number of sub-lenses.

[0011] As a preferred solution, each sub-lens is a spherical lens, an aspherical lens, or a cylindrical lens.

[0012] As a preferred solution, the beam splitting element comprises a fly-eye lens, and the sub-lenses of the fly-eye lens are arranged in an N×M array to split the collimated light beam into N×M sub-beams.

[0013] As a preferred solution, the shaping component also includes a right-angle prism arranged between the output end of the pump light module and the focusing mirror, and the right-angle prism is used to correct the collimated light beam so that the size of the spot of the collimated light beam in the fast axis and slow axis directions is consistent.

[0014] As a preferred solution, the collimated light beam is incident on the right-angle surface of the right-angle prism, and the linear diameter of the collimated light beam in the fast axis direction is reduced; or,

[0015] The collimated light beam is incident on the inclined surface of the right-angle prism, and the linear diameter of the collimated light beam in the slow axis direction is expanded to achieve the same size of the light spot of the collimated light beam in the slow axis direction and the fast axis direction.

[0016] As a preferred solution, the refractive index of the right-angle prism is greater than or equal to 1.45, and the transmittance is greater than 95%.

[0017] As a preferred solution, the pump light module includes a beam combining component, at least one chip component, and a plurality of collimating components arranged corresponding to each chip in the chip component, and the collimating components are used to convert the pump light emitted from the corresponding chip into a collimated light beam;

[0018] The beam combining component is arranged on the output light path of at least two collimated light beams, and is used for combining multiple collimated light beams to output a single collimated light beam.

[0019] As a preferred solution, the beam combining assembly includes a polarization beam combiner and a plurality of first light spot steering elements, each of which is used to redirect a collimated light beam emitted from the collimation assembly to the polarization beam combiner.

[0020] As a preferred solution, at least one chip assembly includes a first chip group and a second chip group.

[0021] The first pump light emitted from the first chipset is converted into a first collimated light beam through the collimating component, and the second pump light emitted from the second chipset is converted into a second collimated light beam through the collimating component;

[0022] The first collimated light beam is deflected by the first light spot deflection element and then reflected by the polarization beam combiner and then output along the first direction. The second collimated light beam is deflected by the first light spot deflection element and then output along the first direction through the polarization beam combiner.

[0023] In summary, the multi-pigtail laser output pump source provided in the present application includes a pump light module, a shaping component and a plurality of coupling optical fibers. Among them, the pump light module is used to output a single collimated light beam; the shaping component is arranged on the output optical path of the collimated light beam, including a focusing mirror and a beam splitting element arranged in sequence, and the beam splitting element is used to split the focused collimated light beam to form multiple sub-beams and output them, and each sub-beam is coupled to the corresponding coupling optical fiber after being emitted from the beam splitting element. The pump source proposed in the present application realizes the multi-beam output of a single pump source through a beam splitting element; and, by splitting the light beam output by the pump source, the light spot of the light beam received by each coupling optical fiber is smaller, and the light density becomes larger, thereby improving the brightness of each output beam of the pump source. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a multi-pigtail laser output pump source provided by the present application;

[0025] Figure 2 It is a schematic structural diagram of another multi-pigtailed fiber laser output pump source provided in the present application.

[0026] Figure 3 This is a schematic diagram of the output optical path principle of a beam splitting element provided by the present application;

[0027] Figure 4 This is a schematic diagram of the output light path principle of a right-angle prism provided by the present application;

[0028] The accompanying drawings are as follows:

[0029] 1. Chip assembly; 11. Chip; 2. Collimation assembly; 3. Beam combining assembly; 4. Shaping assembly; 41. Right-angle prism; 43. Beam splitting element; 44. Focusing mirror; 45. Fixing part; 430. Sub-lens; 51. First light spot steering element; 52. Second light spot steering element; 6. Shell substrate. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. It will be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings. It is obvious to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and changes of the present invention that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present invention can be combined with each other without contradiction.

[0031] In view of one or more of the above problems existing in the prior art, the present invention proposes a multi-pigtailed fiber laser output pump source. Figure 1 This is a schematic diagram of a structure of a multi-pigtail laser output pump source provided by the present application. Figure 2 This is a schematic diagram of another structure of a multi-pigtail laser output pump source provided by the present application, refer to Figure 1-Figure 2 The multi-pigtail laser output pump source provided in the embodiment of the present invention includes a pump light module, a shaping component and a plurality of coupling optical fibers. The pump light module is used to output a single collimated light beam; the shaping component is arranged on the output optical path of the collimated light beam, and the shaping component specifically includes a focusing mirror and a beam splitting element arranged in sequence, and the beam splitting element is used to split the focused collimated light beam to form multiple sub-beams and output them; each sub-beam is coupled into the corresponding coupling optical fiber after being emitted from the beam splitting element.

[0032] It can be understood that a collimated beam refers to a beam with a small beam divergence angle, that is, a beam whose beam radius does not change after a certain propagation distance. In an embodiment of the present invention, the pump light module can use a single chip with good collimation; or it can use multiple chips, and the multi-path pump light emitted by the chips is collimated and combined to output a single collimated beam, which is not limited in the embodiment of the present invention.

[0033] refer to Figure 1-Figure 2 , take the pump light module including a beam combining component 3, at least one chip component 1 and a plurality of collimating components 2 corresponding to each chip in the chip component 1 as an example. Each chip component 1 has a plurality of independent chips 11, and each chip 11 is an independent light-emitting unit. Taking a two-way chip component 1 as an example, the pump light emitted by each chip 11 in the two-way chip component 1 is emitted along the A direction to the collimating component 2 corresponding to the chip, and after being turned, is transmitted along the B direction to the polarization beam combining component 3. Among them, the A direction and the B direction are orthogonal.

[0034] The collimation component 2 is arranged on the output optical path of the pump light of each chip to convert the pump light into a collimated light beam. Usually, the divergence angle of the pump light emitted by the chip component 1 is large, and the collimation component 2 is used to collimate the pump light to convert it into a linearly polarized collimated light beam. In an embodiment of the present invention, the collimation component 2 may include a fast-axis collimator and a slow-axis collimator arranged in sequence, and the fast-axis collimator is arranged close to the light-emitting surface of the corresponding chip and connected to the corresponding slow-axis collimator optical path. The fast-axis collimator is used to collimate the light spot in the fast-axis direction of the laser, and the slow-axis collimator is used to collimate the light spot in the slow-axis direction of the laser.

[0035] For example, the chip assembly of the pump source of the embodiment of the present invention can be divided into double rows or single rows along the B direction, and the light-emitting centers of the chips in the same row of chip assemblies are all on different planes. A fast-axis collimator and a slow-axis collimator are sequentially placed along the direction of the light output path of each chip 11, and the two can be regarded as a group of steering compression optical elements. The steering compression optical element can steer and compress the collimated light beam passing through the fast-axis collimator and the slow-axis collimator.

[0036] The beam combining component 3 is arranged on the output optical path of at least two collimated light beams, and is used to combine multiple collimated light beams into a single collimated light beam. For example, a polarized beam combiner (PBC) can be used to combine collimated light beams with orthogonal polarization states for output. In the embodiment of the present invention, the shape of the polarized beam combiner can be a sheet or a block, and the collimated light beams with orthogonal polarizations can be combined for output, which is not limited in the embodiment of the present invention. Figure 1-Figure 2 Only the block shape is used as an example.

[0037] Please continue to refer to Figure 1 The shaping component 4 is arranged on the output optical path of the collimated light beam to split the collimated light beam. In the embodiment of the present application, the shaping component 4 includes a focusing lens 44 and a beam splitting element 43 arranged in sequence, and the beam splitting element 43 includes a plurality of identical sub-lenses arranged in a predetermined shape, and the number of coupling optical fibers is consistent with the number of sub-lenses.

[0038] In one embodiment, the beam splitting element 43 includes a plurality of identical sub-lenses 430 arranged in a predetermined shape, the number of coupling optical fibers is consistent with the number of sub-lenses 430, and the collimated light beams are respectively coupled into the corresponding coupling optical fibers after being incident from each sub-lens 430.

[0039] Optionally, each sub-lens is a spherical lens, an aspherical lens, or a cylindrical lens.

[0040] Please continue to refer to Figure 3 When the beam splitting element 43 is configured as a fly-eye lens, each sub-lens of the fly-eye lens is a spherical lens and is arranged in an N×M array to split the collimated light beam into N×M sub-beams. It can be understood that the working principle of the beam splitting element 43 is as follows: Figure 3 As shown: the beam splitting element is a microstructure that imitates the optical system of insect compound eyes, and is composed of N×M rectangular aperture spherical sub-lenses 430 arranged in a matrix and of the same specifications. Each spherical sub-lens 430 is equivalent to a pixel point, and these spherical sub-lenses 430 can independently converge light into an image, and then the images formed by each spherical sub-lens 430 are superimposed to obtain the imaging result of the entire beam splitting element.

[0041] Among them, N and M are positive integers, and the values ​​of N and M depend on the beam splitting requirements of the pump source. The corresponding beam splitting is N×M sub-beams, which are received by the coupled optical fiber to complete the multi-coupled optical fiber output and realize multi-beam output.

[0042] Among them, multi-coupled fiber output refers to multiple pigtail outputs, and the shape of the sub-lens can also be a regular hexagon, a circle, etc.

[0043] It should be explained that, considering that the light strip of the high-power chip 11 is relatively wide, for example, a light strip with a width of 400 μm can generally be coupled into a coupling optical fiber with a diameter of 400 μm, and after focusing, it can only be coupled into a coupling optical fiber with a diameter of 300 μm. However, the embodiment of the present invention uses a coupling beam splitter element 43 to split the focused light spot into N×M sub-beams, and the light spot received by each coupling optical fiber becomes smaller, and the light density becomes larger, thereby improving the brightness of the final output light beam.

[0044] In some embodiments, reference Figure 2 The shaping component 4 also includes a focusing lens (not shown in the figure) arranged at the output end of the pump light module. Figure 1 ) between the right-angle prism 41, which is used to correct the collimated light beam so that the size of the spot of the collimated light beam in the slow axis direction and the fast axis direction is consistent.

[0045] It can be understood that a right-angle prism is an optical element that can magnify or reduce an elliptical beam in one dimension, convert the elliptical output beam of a laser diode into an approximately circular beam, and also convert a circular beam into an elliptical beam. As an example, the right-angle prism 41 is usually made of high-quality transparent material, such as SF11 glass. Its dimensional tolerance is +0.0 / -0.2mm, the aperture is greater than 80%, the angle tolerance is ±3arcmin, the surface quality is 60-40S-D, the surface flatness is less than λ / 4@632.8nm, the protective chamfer is less than 0.25mm x 45 degrees, and a coating can be provided as required.

[0046] Specifically, refer to Figure 2, the pump light emitted by several chips 11 in the chip assembly 1 is first shaped in the fast axis direction by the fast axis collimator in the collimator assembly 2, and then shaped in the slow axis direction by the slow axis collimator. The multi-output optical path collimated light beams output by each chip 11 are stacked in the fast axis direction and transmitted to the beam combining assembly 3. After the beams are combined to form a single collimated light beam, they are transmitted to the surface of the right-angle prism 41, where the merged collimated light beam can be monitored as an irregular rectangular light spot or an irregular light spot. However, usually the shape of the pump light emitted by each chip 11 in the chip assembly 1 is elliptical. The right-angle prism 41 can expand the fast axis of the collimated light beam, or shrink the slow axis, so that its output light spot is shaped into an approximately square or circular light spot, which is focused by the focusing lens and directly output as spatial light or coupled into the coupling optical fiber for output.

[0047] Please refer to Figure 4 , Figure 4 This is a schematic diagram of the principle of the output light path of a right-angle prism provided by the present application. The principle of the output light path of the right-angle prism 41 is: the refraction of the collimated light beam (elliptical light beam) after passing through the right-angle prism 41 satisfies the Snell refraction formula: n0sinθ1=nsinθ2. Among them, θ1 is the angle between the collimated light beam and the normal of the incident surface of the right-angle prism 41, that is, the incident angle, θ2 is the refraction angle of the collimated light beam at the interface of the right-angle prism 41, n0 is the refractive index of air, and n is the refractive index of the right-angle prism 41.

[0048] Optionally, the refractive index n of the right-angle prism 41 is greater than or equal to 1.45, and the transmittance is greater than 95%, wherein the refractive index of air is 1. The right-angle prism 41 made of a material with a larger refractive index is beneficial to increasing the refracted optical path of the collimated light beam and improving the shaping effect of the light spot shape.

[0049] In the embodiment of the present application, the collimated light beam can be incident on the right angle surface of the right angle prism 41 to reduce the diameter of the collimated light beam in the fast axis direction; or the collimated light beam can be incident on the inclined surface of the right angle prism 41 to expand the diameter of the collimated light beam in the slow axis direction to achieve the same size of the spot of the collimated light beam in the slow axis direction and the fast axis direction. Figure 2 , the embodiment of the present invention is only described by taking the collimated light beam incident on the inclined surface of the right-angle prism 41 and emitting on the right-angle surface as an example. The slow axis diameter of the collimated light beam before incident on the inclined surface of the right-angle prism 41 is D1, and the fast axis diameter is D2. After the collimated light beam is incident on the inclined surface of the right-angle prism 41 and passes through the prism, the slow axis diameter D1 of the light spot is enlarged to D2, D1<D2, and the enlargement ratio is the cosine ratio of the refraction angle θ2 and the incident angle θ1. Among them, the enlargement ratio can also be called the beam expansion rate M. Among them, M can be calculated using the following formula:

[0050]

[0051] It can be understood that the beam expansion rate M of the right-angle prism 41 is equal to the slow axis beam expansion rate required by the design. In the embodiment of the present invention, the right-angle prism 41 expands the slow axis diameter D1 of the collimated light beam to D2, so M = D2 / D1. Figure 2 The elliptical collimated light beam combined by the beam combining component 3 is shaped into an approximately square or circular light spot for output by the right-angle prism 41. In this way, the influence caused by the astigmatism characteristics of the chip 11 can be reduced and the beam quality of the output laser can be improved.

[0052] In other embodiments, the fast axis diameter D2 can be narrowed to D1 by a right-angle prism 41, and the spot of the collimated light beam can be shaped to achieve an approximately square or circular spot output, which will not be explained in detail in the embodiments of the present invention.

[0053] It should be noted that, in the embodiment of the present invention, the right-angle prism 41 can be used to change the beam line diameter along the fast axis diameter or the slow axis diameter of the collimated beam, while keeping the optical axis of the collimated beam unchanged and transmitting it along another axis direction, thereby achieving spot size expansion and beam reshaping. The characteristics of the right-angle prism 41 can be used to correct the asymmetric elliptical beam generated by the chip 11, and obtain a nearly circular (or square) laser spot, so as to facilitate subsequent coupling fiber coupling or beam splitting.

[0054] In the embodiment of the present invention, the focusing mirror in the shaping component can be a non-spherical lens. In the embodiment of the present invention, a right-angle prism 41 is used to shape the spot of the collimated light beam. Since the right-angle prism 41 has shaped the collimated light beam from an elliptical beam to a circular beam, at the rear end of the shaped collimated light beam, only one focusing mirror is needed to further compress the divergence angle of the shaped collimated light beam, so as to achieve high-brightness single beam output. Compared with the solution in the prior art that requires the fast-axis collimator and the slow-axis collimator to be set after the beam combining component 3, the present application omits the more expensive slow-axis focusing mirror that needs to be set at the rear end of the beam combining component 3, thereby reducing the production cost. At the same time, the pump source provided by the embodiment of the present invention has the advantages of short working length and compact output optical path structure, which is conducive to the development of lasers to smaller volumes and higher integration.

[0055] It should be noted that in the optical structure based on the conventional focusing module, the conventional slow axis focusing mirror is usually a spherical cylindrical mirror, or it can be an aspherical cylindrical mirror. In the field of high-power lasers, spherical mirrors are limited by high power, limited selection, and limited focal length. Compared with flat glass processing, the cost is higher. In the pump source provided in the embodiment of the present invention, the right-angle prism 41 has a large angle tolerance and low surface accuracy requirements, which can reduce the cost of the lens to a certain extent.

[0056] It should be noted that when the right-angle prism 41 and the beam splitter 43 are used in combination, the right-angle prism 41 is first used to correct the laser spot of the collimated light beam, and then the beam splitter 43 is used to separately converge the collimated light beam after the spot correction and then split it to form multiple sub-beams coupled into the coupling optical fiber. The right-angle prism 41 and the beam splitter 43 have the advantages of the above-mentioned embodiments, which will not be repeated here. In this way, the final output laser beam can obtain a circular spot with good spot quality, and at the same time, the spot of each sub-beam after splitting becomes smaller, the light density becomes larger, and it has higher brightness. At the same time, there is no need to set a fast-axis collimator and a slow-axis collimator at the rear end of the beam combining component 3, thereby reducing the production cost and meeting the application requirements of multi-beam, high power, high brightness, and circular spot output.

[0057] Based on the above embodiments, Figure 1-Figure 2 The beam combining component 3 includes a polarization beam combiner and a plurality of first light spot steering elements 51, each of which is used to redirect the collimated light beam emitted from the collimation component to the polarization beam combiner. It can be understood that the polarization beam combiner includes a first incident surface and a second incident surface, the first incident surface is used to reflect the incident light beam, and the second incident surface is used to transmit the incident light beam. The incident light beam and the reflected light beam are combined in the polarization beam combiner and output in the same direction. At least part of the first light spot steering elements 51 are arranged corresponding to the output end of the collimation component 2, and are used to receive each collimated light beam and reflect and redirect it to the first incident surface and the second incident surface of the polarization beam combiner, and the polarization beam combiner combines the collimated light beams with orthogonal polarization states and outputs them. Among them, the first light spot steering element 51 can be a reflector.

[0058] Based on the above embodiments, Figure 1-Figure 2 , at least one chip assembly 1 includes a first chip group and a second chip group. The first pump light emitted from the first chip group is converted into a first collimated light beam by the collimating assembly 2, and the second pump light emitted from the second chip group is converted into a second collimated light beam by the collimating assembly 2. Exemplarily, the polarization states of the first collimated light beam and the second collimated light beam are orthogonal, the first collimated light beam is S polarized light, and the second collimated light beam is P polarized light. The first collimated light beam is deflected by the first light spot deflection element 51 and then reflected by the polarization beam combiner and then deflected along the first direction ( Figure 1-2 The second collimated light beam is output along the first direction (B direction) after being deflected by the first light spot deflection element 51 and transmitted through the polarization beam combiner. Figure 1-3 B direction). One of the first collimated light beam and the second collimated light beam continues to be deflected by the first light spot deflection element to the first incident surface of the polarization beam combiner, and the other directly enters the second incident surface of the polarization beam combiner. After being combined by the polarization beam combiner, the two are output along the same beam direction to obtain a collimated light beam.

[0059] Optional, reference Figure 1-2, the pump source also includes a half-wave plate (not shown in the figure), which is arranged on the optical path between the polarization beam combiner and the first light spot steering element 51 arranged corresponding to the second incident surface of the polarization beam combiner. Among them, the half-wave plate can also be called a phase delay plate, a 1 / 2 wave plate. It is made of birefringent materials. The polarization direction of linear polarization can be changed by using a half-wave plate, for example, vertical polarization can be converted into horizontal polarization. In some embodiments, the polarization directions of the first collimated light beam and the second collimated light beam are not orthogonal, and the polarization direction of the second collimated light beam can be adjusted by adding a half-wave plate so that the polarization directions of the second collimated light beam and the first collimated light beam are orthogonal.

[0060] Based on the above embodiments, Figure 1-Figure 2 , the pump source also includes a shell substrate 6, and the chip assembly 1 is arranged on the shell substrate 6. The shell substrate 6 is used to carry and encapsulate various devices of the pump source. In an embodiment of the present invention, each chip assembly 1 includes multiple chips 11. According to the number of chips 11 in the chip assembly 1, a step structure is arranged at the position of the shell substrate 6 corresponding to each chip assembly 1, and a group of chips 11 is placed on each step structure. The light-emitting centers of multiple chips 11 in the same channel are all on different planes. After a number of chips 11 are collimated by the collimation assembly 2, they are reflected by the corresponding first light spot steering element 51, and the multi-channel collimated light beams are stacked in the fast axis direction to the beam combining assembly 3. After being combined by the beam combining assembly 3, they are shaped and output by the shaping assembly 4. Such a setting is conducive to the coaxiality of multi-channel pump lights and improves the laser coupling efficiency.

[0061] It can be understood that, along the direction away from the beam combining component 3 , the height of the step structure increases successively, and the light emitting centers of two adjacent chips 11 become higher successively.

[0062] Based on the above embodiments, Figure 1-Figure 2 The pump source further includes a second light spot steering element 52, which is disposed in the light output direction of the right-angle prism 41 and is used to adjust the output direction of the collimated light beam output from the right-angle prism 41, thereby reducing the length of the pump source along the first direction, which is beneficial to overall integration and miniaturization. The second light spot steering element 52 can be a coated reflector.

[0063] For example, reference Figure 1 The second light spot steering element 52 is arranged on the output light path between the focusing mirror 44 and the beam splitting element 43 , and is used to redirect the light beam focused by the focusing mirror 44 to the beam splitting element 43 .

[0064] In the embodiment of the present application, the first light spot deflection element 51 and the second light spot deflection element 52 are both perpendicular to the housing substrate 6 to ensure that the laser output beam can be emitted in a horizontal direction during normal use.

[0065] refer to Figure 2The shaping component 4 may further include a fixing member 45 for fixing the right-angle prism 41 .

[0066] In the embodiment of the present invention, the number of chip components can be reasonably selected according to the output power. Each group of chip components emits one pump light, and multiple pump lights are output after beam shaping by a collimating component, beam combining by a beam combining component, spot shaping, focusing coupling or beam splitting, so as to achieve high-power and high-brightness laser output.

[0067] It should be noted that the pump source also includes an electrical module ( Figure 1-Figure 2 (not shown in the figure), the electrical module is electrically connected to the pump light module, the electrical module includes a control circuit, the chip component is electrically connected to the control circuit, the control circuit is configured to control the driving current of the light-emitting component to adjust the power value of the pump light, and control the laser power stability of the collimated light beam.

[0068] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multi-pigtail laser output pump source, characterized in that: include: A pump light module, used to output a single collimated light beam; A shaping component is arranged on the output optical path of the collimated light beam, the shaping component comprises a focusing mirror and a beam splitting element which are arranged in sequence, the beam splitting element is used to split the focused collimated light beam to form a plurality of sub-beams and output them; as well as A plurality of coupling optical fibers, each of the sub-beams is coupled to the corresponding coupling optical fiber after being emitted from the beam splitting element.

2. The pump source according to claim 1, characterized in that: The beam splitting element includes a plurality of identical sub-lenses arranged in a predetermined shape, and the number of the coupling optical fibers is consistent with the number of the sub-lenses.

3. The pump source according to claim 2, characterized in that: Each of the sub-lenses is a spherical lens, an aspherical lens, or a cylindrical lens.

4. The pump source according to claim 1, characterized in that: The beam splitting element comprises a fly-eye lens, and each sub-lens of the fly-eye lens is arranged in an N×M array to split the collimated light beam into N×M sub-beams.

5. The pump source according to claim 1, characterized in that: The shaping component further comprises a right-angle prism arranged between the output end of the pump light module and the focusing mirror, and the right-angle prism is used to correct the collimated light beam so that the size of the spot of the collimated light beam in the fast axis and the slow axis directions is consistent.

6. The pump source according to claim 5, characterized in that: The collimated light beam is incident on the right-angle surface of the right-angle prism, and the linear diameter of the collimated light beam in the fast axis direction is reduced; or, The collimated light beam is incident on the inclined surface of the right-angle prism, and the linear diameter of the collimated light beam in the slow axis direction is expanded to achieve the same size of the light spot of the collimated light beam in the slow axis direction and the fast axis direction.

7. The pump source according to claim 5, characterized in that: The refractive index of the right-angle prism is greater than or equal to 1.45, and the transmittance is greater than 95%.

8. The pump source according to claim 1, characterized in that: The pump light module comprises a beam combining component, at least one chip component and a plurality of collimating components arranged corresponding to each chip in the chip component, wherein the collimating components are used to convert the pump light emitted from the corresponding chip into a collimated light beam; The beam combining component is arranged on the output optical path of at least two of the collimated light beams, and is used for combining a plurality of the collimated light beams into a single collimated light beam.

9. The pump source according to claim 8, characterized in that: The beam combining assembly includes a polarization beam combiner and a plurality of first light spot steering elements, each of which is used to redirect the collimated light beam emitted from the collimation assembly to the polarization beam combiner.

10. The pump source according to claim 8, characterized in that: At least one chip assembly includes a first chip set and a second chip set, The first pump light emitted from the first chipset is converted into a first collimated light beam through a collimating component, and the second pump light emitted from the second chipset is converted into a second collimated light beam through the collimating component; The first collimated light beam is deflected by the first light spot deflection element and then reflected by the polarization beam combiner and then output along the first direction. The second collimated light beam is deflected by the first light spot deflection element and then output along the first direction through the polarization beam combiner.

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