Light source device and laser apparatus

Abstract

The utility model discloses a light source device and laser equipment. The light source device comprises a laser module, a reflection module, a condensation module, an optical fiber and a collimation module. The laser module comprises N laser units, the reflection module comprises N reflection units, the N reflection units are in one-to-one correspondence with light paths where two paths of first laser light generated by the N laser units are located, and each reflection unit is used for reflecting the corresponding two paths of first laser light to form two paths of second laser light. And the condensation module is used for focusing the N * 2 paths of second laser. The coupling-in end of the optical fiber is arranged on a light path where the focused laser is located. The collimation module is arranged on a light path where the focused laser emitted by the optical fiber is located. According to the invention, the optical fiber is arranged on the light path of the focused laser between the light condensing module and the collimation module, so that when the focused laser is transmitted in the optical fiber, stray light with a propagation angle larger than a total reflection critical angle of the optical fiber can be separated out of the core layer of the optical fiber, and stray light in the focused laser can be filtered out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical illumination, and more particularly, to a light source device and a laser device. BACKGROUND

[0002] In the related art, in order to improve the illumination power of a laser illumination device (for example, a laser lamp), a plurality of laser chips are usually arranged to generate a plurality of laser beams, and the plurality of laser beams are combined to form a high-power laser beam.

[0003] However, the existing laser illumination device mixes a certain amount of stray light into the laser beam generated after the combination, thereby reducing the illumination effect of the laser illumination device. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a light source device and a laser device.

[0005] According to a first aspect of the present application, the present application provides a light source device, which includes a laser module, a reflection module, a light collection module, an optical fiber, and a collimation module. The laser module includes N laser units, each of which is configured to generate two first laser beams, and N is a positive integer greater than 1. The reflection module includes N reflection units, each of which is configured to reflect the corresponding two first laser beams to form two second laser beams. The light collection module is arranged on the optical path of the N*2 second laser beams and is configured to focus the N*2 second laser beams to form a focused laser beam. The optical fiber has a coupling-in end and a coupling-out end, the coupling-in end is arranged on the optical path of the focused laser beam, and the focused laser beam is emitted through the coupling-out end after propagating through the optical fiber. The collimation module is arranged on the optical path of the focused laser beam emitted through the optical fiber and is configured to collimate the focused laser beam.

[0006] In some possible embodiments, the light collection module includes a light combination unit and a light collection unit. The light combination unit is arranged on the optical path of the N*2 second laser beams and is configured to combine the N*2 second laser beams to generate N third laser beams. The light collection unit is arranged on the optical path of the N third laser beams and is configured to focus the N third laser beams to form a focused laser beam.

[0007] In some possible embodiments, the two second lasers formed by each reflection unit include a first sub-laser and a second sub-laser, and a first sub-spot corresponding to the first sub-laser and a second sub-spot corresponding to the second sub-laser are arranged in a slow-axis direction of the first sub-spot; N first sub-spots corresponding to N first sub-lasers formed by N reflection units are arranged in a fast-axis direction of the first sub-spot, and N second sub-spots corresponding to N second sub-lasers formed by the N reflection units are arranged in the fast-axis direction of the first sub-spot.

[0008] In some possible embodiments, the polarization states of the first sub-laser and the second sub-laser are both a first polarization state; the light combining unit includes a half-wave plate, a first mirror, and a polarizer; the polarizer is arranged on an optical path of the N first sub-lasers, the first mirror is arranged on an optical path of the N second sub-lasers, and is configured to reflect the N second sub-lasers to the polarizer; the polarizer is configured to polarize and combine the N first sub-lasers and the N second sub-lasers to generate N third lasers; the half-wave plate is arranged on the optical path of the N first sub-lasers; or, the half-wave plate is arranged on the optical path of the N second sub-lasers; and the half-wave plate is configured to adjust the polarization state of the laser from the first polarization state to a second polarization state, and the second polarization state and the first polarization state are orthogonal linear polarization states.

[0009] In some possible embodiments, a central wavelength of the first sub-laser is a first wavelength, and a wavelength of the second sub-laser is a second wavelength, and the second wavelength is different from the first wavelength; the light combining unit includes a second mirror and a dichroic plate; the dichroic plate is arranged on an optical path of the N first sub-lasers, and the second mirror is arranged on an optical path of the N second sub-lasers, and is configured to reflect the N second sub-lasers to the dichroic plate; and the dichroic plate is configured to combine the N first sub-lasers and the N second sub-lasers in a wavelength direction to generate N third lasers.

[0010] In some possible embodiments, the light collecting unit includes a first light collecting mirror and a second light collecting mirror, and the first light collecting mirror and the second light collecting mirror are arranged on an optical path of the N third lasers in sequence; the first light collecting mirror is configured to focus the N third lasers in a fast-axis direction of a third laser corresponding spot, and the second light collecting mirror is configured to focus the N third lasers in a slow-axis direction of the third laser corresponding spot.

[0011] In some possible embodiments, the first light collecting mirror and the second light collecting mirror are both cylindrical mirrors.

[0012] In some possible embodiments, two first spots corresponding to two first lasers generated by a same laser unit are arranged in a slow-axis direction of the first spot, and projections of first spots corresponding to different laser units in the slow-axis direction of the first spot do not coincide.

[0013] In some possible embodiments, each laser unit comprises a laser chip, a fast-axis collimation lens and a slow-axis collimation lens; the laser chip is configured to generate two paths of first laser light, and the fast-axis collimation lens and the slow-axis collimation lens are sequentially arranged on an optical path of the two paths of first laser light and are configured to collimate the two paths of first laser light, respectively.

[0014] In some possible embodiments, the N laser chips are sequentially arranged along a slow-axis direction of a first light spot corresponding to the first laser light; each laser chip is provided with an output port through which the first laser light is emitted, and projections of the output ports corresponding to different laser chips on the slow-axis direction of the first light spot do not coincide.

[0015] In some possible embodiments, the optical path of the first laser light between the plurality of reflecting units and the corresponding laser chips is equal.

[0016] In some possible embodiments, the N laser chips are sequentially arranged along a slow-axis direction of a first light spot corresponding to the first laser light; each laser chip is provided with an output port through which the first laser light is emitted, and projections of the output ports corresponding to different laser chips on the slow-axis direction of the first light spot coincide; each laser unit further comprises a third reflecting mirror arranged on an optical path of the two paths of first laser light between the fast-axis collimation lens and the slow-axis collimation lens; the optical path of the first laser light between the plurality of third reflecting mirrors and the corresponding laser chips is different.

[0017] According to a second aspect of the present application, an embodiment of the present application further provides a laser device, which comprises a housing and the light source device described above, and the light source device is arranged in the housing.

[0018] The present application provides a light source device and a laser device. The light source device can comprise a laser module, a reflecting module, a light converging module, an optical fiber and a collimation module. In one aspect, since the focused laser light is obtained by converging and combining the N*2 paths of second laser light by the light converging module, the overall power of the focused laser light can be improved. In another aspect, the optical fiber is arranged on an optical path of the focused laser light between the light converging module and the collimation module, so that when the focused laser light is transmitted in the optical fiber, stray light with a propagation angle greater than the critical angle of total reflection of the optical fiber can be separated from the core layer of the optical fiber, so as to filter out the stray light in the focused laser light. In the subsequent optical path, after the collimation module collimates the focused laser light, a light spot without stray light and with clear boundaries can be obtained, so as to improve the beam quality of the focused laser light. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a laser device provided by an embodiment of the present application.

[0021] Figure 2 FIG. 2 is a structural schematic diagram of a light source device in the laser device shown in FIG. 1. Figure 1

[0022] Figure 3 FIG. 3 is a schematic diagram of stray light in a light spot provided by an embodiment of the present application.

[0023] Figure 4 FIG. 4 is a schematic diagram of a light spot of focused laser light after passing through an optical fiber provided by an embodiment of the present application.

[0024] Figure 5 FIG. 5 is a distribution schematic diagram of a first light spot in the light source device shown in FIG. 2. Figure 2

[0025] Figure 6 FIG. 6 is a schematic diagram of one arrangement of laser chips in the light source device shown in FIG. 2. Figure 2

[0026] Figure 7 FIG. 7 is a schematic diagram of another arrangement of laser chips in the light source device shown in FIG. 2. Figure 2

[0027] Figure 8 FIG. 8 is a position schematic diagram of a third mirror in the light source device shown in FIG. 2. Figure 2

[0028] Figure 9 FIG. 9 is a position schematic diagram of a reflecting unit in the light source device shown in FIG. 2. Figure 2

[0029] Figure 10 FIG. 10 is a distribution schematic diagram of a first sub-light spot and a second sub-light spot in the light source device shown in FIG. 2. Figure 2

[0030] Figure 11 FIG. 11 is a structural schematic diagram of a light collecting module in the light source device shown in FIG. 2. Figure 2

[0031] Figure 12 FIG. 12 is another structural schematic diagram of the light collecting module in the light source device shown in FIG. 2. Figure 2 DETAILED DESCRIPTION ​​​​​​​​​

[0032] In order to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0033] The present application provides a light source device 100 and a laser device 200 provided with the light source device 100. The laser device 200 refers to a hardware device using laser as a light source. In some possible embodiments, the laser device 200 can be a laser processing device, for example, a laser engraver, a laser cutter, etc. In other possible embodiments, the laser device 200 can also be a laser lighting device, for example, a laser stage light, a laser flashlight, a laser projection light, etc.

[0034] Please refer to Figure 1 The laser device 200 can include the light source device 100 and a housing 210. The housing 210 is used to provide a mounting space for accommodating the light source device 100, and plays a role of fixing and protecting the light source device 100. The light source device 100 is used to generate focused laser J, and the housing 210 can also be provided with a light outlet 2120, so that the focused laser J is emitted to the outside through the light outlet 2120.

[0035] In some possible embodiments, the laser device 200 can also include a uniform light fiber 230, which is arranged between the light source device 100 and the light outlet 2120 and located on the light path of the focused laser J. In one aspect, the uniform light fiber 230 can adjust the propagation direction of the focused laser J, so that the light path structure inside the laser device 200 is more compact. In another aspect, the uniform light fiber 230 can also uniform the focused laser J to eliminate the speckle in the focused laser J. Specifically, the uniform light fiber 230 can be a quartz optical fiber, a full-plastic optical fiber, etc., which is not limited in the present application.

[0036] It should be noted here that the uniform light fiber 230 and the optical fiber in the light source device 100 are not the same, and their setting positions and roles are not the same. Specifically, the uniform light fiber 230 is arranged on the light path of the focused laser J emitted through the collimation module in the light source device 100, and is mainly used for adjusting the propagation direction of the focused laser J and uniforming the focused laser J. The optical fiber in the light source device 100 is arranged on the light path of the focused laser J between the light collecting module and the collimation module, and is mainly used for eliminating stray light in the focused laser J.

[0037] Of course, the optical fiber in the light source device 100 also has the function of light homogenization. In some possible embodiments, the above-mentioned light homogenization optical fiber 230 can not be arranged in the laser device 200, so as to reduce the hardware cost of the laser device 200. In other possible embodiments, the laser device 200 can be provided with one or more mirrors (not shown in the figure) to replace the above-mentioned light homogenization optical fiber 230, and the one or more mirrors are used to reflect the focused laser J to the light outlet 2120, so as to adjust the propagation direction of the focused laser J.

[0038] Please refer to Figure 2 , the light source device 100 can include a laser module 10, a reflection module 20, a light collection module 30, an optical fiber 40, and a collimation module 50. The laser module 10 can include N laser units 120, each of which is used to generate two paths of first laser L1, and N is a positive integer greater than 1. In the embodiment shown in the figure, N is 3. In other possible embodiments, N can also be 2, 4, 5, 6, 8, etc. Specifically, the number of laser units 120 can be adjusted according to the target power of the focused laser J, that is, the more the number of laser units 120, the greater the target power of the focused laser J. Figure 2

[0039] The reflection module 20 can include N reflection units 250, which are arranged one-to-one on the light path of the two paths of first laser L1 generated by the N laser units 120, and each reflection unit 250 is used to reflect the corresponding two paths of first laser L1 to form two paths of second laser L2. Therefore, after being reflected by the N reflection units 250, N*2 paths of second laser L2 are formed. The light collection module 30 is arranged on the light path of the N*2 paths of second laser L2, and is used to focus the N*2 paths of second laser L2 to form one path of focused laser J. The optical fiber 40 is provided with a coupling-in end 410 and a coupling-out end 430, the coupling-in end 410 is arranged on the light path of the focused laser J, and the focused laser J is emitted through the coupling-out end 430 after propagating through the optical fiber 40. The collimation module 50 is arranged on the light path of the focused laser J emitted through the optical fiber 40, and is used to collimate the focused laser J.

[0040] ​The embodiment of the present application provides a light source device 100, which can include a laser module 10, a reflection module 20, a light condensing module 30, an optical fiber 40 and a collimation module 50. In one aspect, since the focused laser J is obtained by focusing and combining N*2 paths of the second laser L2 by the light condensing module 30, the overall power of the focused laser J can be improved. In another aspect, the present application sets the optical fiber 40 on the light path of the focused laser J between the light condensing module 30 and the collimation module 50, so that when the focused laser J is transmitted in the optical fiber 40, the stray light with a propagation angle greater than the total reflection critical angle of the optical fiber 40 can be separated from the core layer of the optical fiber 40, so as to filter out the stray light in the focused laser J, wherein the propagation angle refers to the incident angle of the light incident to the interface of the optical fiber 40. In the subsequent light path, after the collimation module 50 collimates the focused laser J, a spot without stray light and with clear boundary can be obtained, so as to improve the beam quality of the focused laser J.

[0041] It should be noted that the above stray light refers to the light rays of the focused laser J corresponding to the spot in the fast axis direction. In the related art, the researchers usually use a diaphragm to remove the stray light. However, the present inventors find through a large number of experiments that the method of setting a diaphragm cannot effectively remove the stray light, and thus the spot of the collimated laser has the problems of unclear boundary and mixed stray light. Please refer to Figure 3 which shows the spot formed by the laser after the diaphragm in the related art. Figure 3 As can be clearly seen from

[0042] The present inventors solve the above problems by setting the optical fiber 40 between the light condensing module 30 and the collimation module 50 to filter out the stray light in the focused laser J. Compared with the method of setting a diaphragm, the stray light can be efficiently removed, so as to improve the beam quality of the focused laser J. Please refer to Figure 4 which shows the spot formed by the focused laser J after the optical fiber 40 in the embodiment, and the stray light around the spot (especially in the fast axis direction) is obviously removed, and the spot has a very clear boundary.

[0043] The specific implementation of the light source device 100 is described below.

[0044] In the embodiment, the two first light spots K1 corresponding to the two first lasers L1 generated by the same laser unit 120 are arranged in the slow axis direction X1 of the first light spot K1. The first light spot K1 is approximately elliptical, and the slow axis direction X1 of the first light spot K1 refers to the direction of the short axis of the ellipse corresponding to the first light spot K1. Specifically, the projections of the two first light spots K1 corresponding to the same laser unit 120 on the slow axis direction X1 of the first light spot K1 coincide, and the projections of the first light spots K1 corresponding to different laser units 120 on the slow axis direction X1 of the first light spot K1 do not coincide. Please refer to Figure 5 which shows the distribution of the six first light spots K1 corresponding to the three laser units 120. It should be noted that the first light spot K1 in the embodiment is a light spot formed by the first plane in Figure 2 . The "first plane" here is a virtual plane, which is perpendicular to the optical axis of the first laser L1 and located between the laser module 10 and the reflection module 20.

[0045] As can be seen from Figure 5 , the first light spots K1 corresponding to different laser units 120 are arranged "offset" from each other in the fast axis direction Y1 of the first light spot K1. The fast axis direction Y1 of the first light spot K1 refers to the direction of the long axis of the ellipse corresponding to the first light spot K1, and the fast axis direction Y1 of the first light spot K1 is perpendicular to the slow axis direction X1 of the first light spot K1. Therefore, when multiple reflection units 250 are arranged on the light path of the subsequent light to reflect the corresponding two first lasers L1, the multiple reflection units 250 can also be arranged "offset" from each other in the fast axis direction Y1 of the first light spot K1 to avoid the situation that one of the reflection units 250 blocks the light path of the other second laser L2, so as to ensure that the N*2 second lasers L2 formed after being reflected by the N reflection units 250 can smoothly enter the light collection module 30.

[0046] Please refer to Figure 2 again, each laser unit 120 can include a laser chip 1210, a fast-axis collimating lens 1230, and a slow-axis collimating lens 1250. The laser chip 1210 is used to generate two first lasers L1, and the fast-axis collimating lens 1230 and the slow-axis collimating lens 1250 are arranged in sequence on the light path of the two first lasers L1, and are used to collimate the two first lasers L1 respectively, so that the two first lasers L1 propagate in the form of parallel light to the corresponding reflection unit 250. Specifically, the laser chip 1210 can be a double-waveguide laser chip. The center wavelengths of the two first lasers L1 generated by the same laser chip 1210 can be the same or different, which is not limited in the embodiment.

[0047] The fast-axis collimation lens 1230 is used for collimating the divergence angle of the first laser L1 in the fast-axis direction Y1, which can be an aspheric cylindrical lens. The slow-axis collimation lens 1250 is used for collimating the divergence angle of the first laser L1 in the slow-axis direction X1, which can be a cylindrical lens (e.g., a meniscus cylindrical lens). The specific implementation of the laser chip 1210, the fast-axis collimation lens 1230, and the slow-axis collimation lens 1250 is not limited in the embodiment.

[0048] In some possible embodiments, the N laser chips 1210 corresponding to the N laser units 120 can be packaged on a substrate (not shown in the figure) to improve the convenience of optical path installation and debugging. Specifically, the substrate can be made of a material (e.g., a metal material) with good heat conduction performance, which can play a good heat dissipation role on the N laser chips 1210 to ensure the working efficiency of the laser chips 1210. As an implementation, the N laser chips 1210 can be mounted on the substrate by using a surface mount device (SMD) process to improve the integration of the laser module 10. In other possible embodiments, the N laser chips 1210 can also be fixed on the substrate 120 by using a transistor outline (TO) packaging method, which is not limited in the embodiment.

[0049] In the embodiment, the N laser chips 1210 are arranged in sequence along the slow-axis direction X1 of the first spot K1 corresponding to the first laser L1. Each laser chip 1210 is provided with an emitting port 1212, and the number of the emitting ports 1212 is two. Two paths of the first laser L1 are emitted through the two emitting ports 1212, respectively.

[0050] Please refer to Figure 6 which shows a schematic diagram of an arrangement of two laser chips 1210. The projections of the two emitting ports 1212 corresponding to the same laser chip 1210 on the slow-axis direction X1 of the first spot K1 coincide, and the projections of the emitting ports 1212 corresponding to different laser chips 1210 on the slow-axis direction X1 of the first spot K1 do not coincide. That is, the emitting ports 1212 corresponding to different laser chips 1210 are arranged “offset” from each other in the fast-axis direction Y1, so as to ensure that the first spots K1 corresponding to different laser units 120 are also arranged “offset” from each other in the fast-axis direction Y1.

[0051] Please refer to Figure 7Fig. 12B shows another arrangement of two laser chips 1210. In this embodiment, the projections of the two light outlets 1212 of the same laser chip 1210 on the slow axis direction X1 of the first light spot K1 coincide, and the projections of the light outlets 1212 of different laser chips 1210 on the slow axis direction X1 of the first light spot K1 coincide. Therefore, the N laser chips 1210 in this embodiment are arranged in a "one" shape in the slow axis direction X1, so that the N*2 first light spots K1 corresponding to the N laser chips 1210 are also arranged in a "one" shape in the slow axis direction X1.

[0052] Specifically, in the embodiment shown in Fig. 12A, the first laser L1 is reflected by the third mirror 1270 and then by the slow axis collimating lens 1250, and then the first laser L1 is reflected by the fast axis collimating lens 1230 and then by the second mirror 1260. Figure 7 In the corresponding embodiment, each laser unit 120 can further include a third mirror 1270 disposed on the optical path of the two first lasers L1 between the fast axis collimating lens 1230 and the slow axis collimating lens 1250. Specifically, the optical path of the first laser L1 between the third mirror 1270 and the corresponding laser chip 1210 is different for different third mirrors 1270. Here, the "optical path of the first laser L1" can also be understood as the straight-line distance between the third mirror 1270 and the corresponding laser chip 1210 in the propagation direction of the first laser L1, i.e., the propagation distance of the first laser L1. The third mirror 1270 can be a plane mirror or a right-angle prism mirror.

[0053] Please refer to Fig. 12C, which shows the positions of two third mirrors 1270. Figure 8 Here, it should be noted that, Figure 8 The "fast axis direction Y1" in Fig. 12C is the fast axis direction of the first laser L1 between the third mirror 1270 and the laser chip 1210. After the first laser L1 is reflected by the third mirror 1270, the "fast axis direction Y1" will change from the vertical direction in Fig. 12C to the horizontal direction. Figure 8 In addition, Figure 8 The optical path diagram shown in Fig. 12C is a projection view in the slow axis direction X1, so the two first lasers L1 generated by the same laser chip 1210 coincide. Specifically, Figure 8 The optical path D1 of the first laser L1 between the third mirror 1270 and the corresponding laser chip 1210 in Fig. 12C is smaller than the optical path D2 of the first laser L1 between the third mirror 1270 and the corresponding laser chip 1210 in Fig. 12D. Figure 8 The optical path D2 of the first laser L1 between the third mirror 1270 and the corresponding laser chip 1210 in Fig. 12D.

[0054] Since the optical path of the first laser L1 between the third mirror 1270 and the corresponding laser chip 1210 is different for different third mirrors 1270, when the first laser L1 is reflected by different third mirrors 1270, the first lasers L1 generated by different laser chips 1210 will be arranged "offset" from each other in the fast axis direction Y1, so as to formFigure 5 The arrangement shown.

[0055] It is not difficult to understand here that, since Figure 7 and Figure 8 In the embodiment shown, the "staggered arrangement" of the multiple first lasers L1 in the fast-axis direction Y1 is achieved by providing a third reflector 1270. Compared with Figure 6 In the embodiment shown, the N laser chips 1210 can be arranged in a "one" shape on the substrate, thereby reducing the processing difficulty and precision of the substrate to reduce the processing cost of the laser module 10.

[0056] In this embodiment, the reflection module 20 can include N reflection units 250, which correspond one-to-one to the light paths of the two first lasers L1 generated by the N laser units 120. Each reflection unit 250 is used to reflect the corresponding two first lasers L1 to form two second lasers L2. Please refer to Figure 9 which shows a schematic view of the positions of two reflection units 250. Figure 9 The two reflection units 250 in are arranged staggered in the fast-axis direction Y1. Specifically, the reflection unit 250 can be a plane mirror or a right-angle prism mirror.

[0057] In this embodiment, the two second lasers L2 formed by each reflection unit 250 include a first sub-laser L21 and a second sub-laser L22. Here, "first sub-laser" and "second sub-laser" are only named for the purpose of describing the light path. The first sub-spot K21 corresponding to the first sub-laser L21 and the second sub-spot K22 corresponding to the second sub-laser L22 are arranged spaced apart along the slow-axis direction X2 of the first sub-spot K21. The N first sub-spots K21 corresponding to the N first sub-lasers L21 formed by the N reflection units 250 are arranged spaced apart along the fast-axis direction Y2 of the first sub-spot K21, and the N second sub-spots K22 corresponding to the N second sub-lasers L22 formed by the N reflection units 250 are arranged spaced apart along the fast-axis direction Y2 of the first sub-spot K21. It should be noted that the first sub-spot K21 and the second sub-spot K22 in this embodiment are the spots formed by the second plane in Figure 2 Here, the "second plane" is a virtual plane, which is perpendicular to the optical axis of the second laser L2 and is located between the reflection module 20 and the condensing module 30.

[0058] It is not difficult to understand that, since the first sub-laser L21 is formed by the reflection of the first laser L1, the first sub-spot K21 is also roughly elliptical, the slow axis direction X2 of the first sub-spot K21 refers to the direction of the short axis of the ellipse corresponding to the first sub-spot K21, the fast axis direction Y2 of the first sub-spot K21 refers to the direction of the long axis of the ellipse corresponding to the first sub-spot K21, and the fast axis direction Y2 of the first sub-spot K21 is perpendicular to the slow axis direction X2 of the first sub-spot K21.

[0059] Please refer to Figure 10 , which shows the distribution diagram of the three first sub-spots K21 and the three second sub-spots K22 corresponding to the three laser units 120. Here, the first sub-spots K21 and the second sub-spots K22 are shown in the form of a schematic diagram. Figure 5 and Figure 10 It is not difficult to find that, under the action of the reflection module 20, the arrangement mode of the N*2 first spots K1 changes to reduce the overall size of the N*2 first spots K1 in the slow axis direction X1. Specifically, the N*2 first spots K1 are roughly arranged in the shape of a "one" character, and the N*2 second spots K2 are arranged in the form of an m*n array to ensure that the N*2 second lasers L2 can subsequently be smoothly incident on the light collection module 30.

[0060] In some possible embodiments, the N laser chips 1210 adopt the arrangement mode as shown in Figure 6 . In this case, the optical path of the first laser L1 between the plurality of reflection units 250 and the corresponding laser chips 1210 is equal. In other possible embodiments, the N laser chips 1210 adopt the arrangement mode as shown in Figure 7 . In this case, the optical path of the first laser L1 between the plurality of reflection units 250 and the corresponding third mirrors 1270 is equal.

[0061] In the present embodiment, the light collection module 30 functions to focus and combine the N*2 second lasers L2. Please refer to Figure 11 , the light collection module 30 can include a light combining unit 320 and a light collection unit 340. The light combining unit 320 is arranged on the optical path of the N*2 second lasers L2, and is used to combine the N*2 second lasers L2 to generate N third lasers L3. Each third laser L3 is formed by the combination of two second lasers L2, and the two second lasers L2 are generated by the same laser unit 120. The light collection unit 340 is arranged on the optical path of the N third lasers L3, and is used to focus the N third lasers L3 to form a focused laser J.

[0062] Therefore, in this embodiment, the focusing module 30 adopts a method of first combining the light and then focusing and combining it. Compared with the method of directly focusing and combining the N*2 second lasers L2, the overall spot size of the N*2 second lasers L2 can be reduced, thereby reducing the size of the optical elements in the focusing unit 340, which is beneficial for the miniaturization design of the light source device 100. In addition, the reduction in the size of the light source device 100 can also reduce the tube volume of the laser device 200 in which the light source device 100 is configured, thereby saving hardware costs of the laser device 200.

[0063] In one implementation, the beam combining unit 320 can combine the N*2 second lasers L2 using polarization beam combining. The polarization states of both the first sub-laser L21 and the second sub-laser L22 are first polarization states, which are linearly polarized states; for example, the first polarization state can be either S-polarized or P-polarized. Figure 11 In the embodiment shown, the light combining unit 320 may include a half-wave plate 3210, a first reflector 3230, and a polarizer 3250.

[0064] exist Figure 11 In the illustrated embodiment, a half-wave plate 3210 is disposed on the optical path of the N-path first sub-laser L21. The half-wave plate 3210 is used to adjust the polarization state of the laser from a first polarization state to a second polarization state, where the second polarization state and the first polarization state are orthogonal linear polarization states. For example, if the first polarization state is S-polarization, the second polarization state is P-polarization; if the first polarization state is P-polarization, the second polarization state is S-polarization. In other possible embodiments, the half-wave plate 3210 may also be disposed on the optical path of the N-path second sub-laser L22. This embodiment does not limit the specific placement of the half-wave plate 3210.

[0065] A polarizer 3250 is disposed in the optical path of the N-path first sub-laser L21, and a first reflector 3230 is disposed in the optical path of the N-path second sub-laser L22. The first reflector 3230 reflects the N-path second sub-laser L22 back to the polarizer 3250. The polarizer 3250 polarizes and combines the N-path first sub-laser L21 and the N-path second sub-laser L22 to generate an N-path third laser L3. Specifically, the first reflector 3230 can be a plane reflector or a right-angle prism reflector. The polarizer 3250 can be a polarizer that transmits S-polarized light and reflects P-polarized light, or it can be a polarizer that transmits P-polarized light and reflects S-polarized light; this embodiment does not impose a specific limitation. For example, in... Figure 11 In the illustrated embodiment, when the first polarization state is P polarization state, the polarizer 3250 is a polarizer that transmits S polarized light and reflects P polarized light; when the first polarization state is S polarization state, the polarizer 3250 is a polarizer that transmits P polarized light and reflects S polarized light.

[0066] In this embodiment, the polarization light combining manner is adopted to combine the N*2 second lasers L2, and the N*2 second lasers L2 can be combined into N third lasers L3 by polarization light combining, that is, N*2 light spots can be compressed into N light spots. By reducing the overall light spot size of the N*2 second lasers L2, the size of the optical element in the light collecting unit 340 can be reduced, which is beneficial to the miniaturization design of the light source device 100.

[0067] As another implementation manner, the light combining unit 320 can combine the N*2 second lasers L2 by wavelength light combining. The center wavelength of the first sub-laser L21 is a first wavelength, and the wavelength of the second sub-laser L22 is a second wavelength, and the second wavelength and the first wavelength are different. Specifically, the first sub-laser L21 and the second sub-laser L22 are different in color, so that the first wavelength and the second wavelength are respectively in the wavelength range of different colors. For example, the first sub-laser L21 can be blue light, and the first wavelength can be greater than or equal to 420 nm and less than or equal to 480 nm; the second sub-laser L22 can be red light, and the second wavelength can be greater than or equal to 620 nm and less than or equal to 760 nm. Please refer to Figure 12 The light combining unit 320 can include a second mirror 3270 and a dichroic sheet 3290.

[0068] The dichroic sheet 3290 is arranged on the light path of the N first sub-lasers L21, and the second mirror 3270 is arranged on the light path of the N second sub-lasers L22, and is used to reflect the N second sub-lasers L22 to the dichroic sheet 3290. The dichroic sheet 3290 combines the N first sub-lasers L21 and the N second sub-lasers L22 by wavelength to generate N third lasers L3. Specifically, the second mirror 3270 can be a plane mirror or a right-angle prism mirror. In the embodiment shown in Figure 12 The dichroic sheet 3290 is used to transmit the N first sub-lasers L21 and reflect the N second sub-lasers L22. In some other possible embodiments, the dichroic sheet 3290 is used to reflect the N first sub-lasers L21 and transmit the N second sub-lasers L22.

[0069] Exemplarily, in a case where the first sub-laser L21 is blue light and the second sub-laser L22 is red light, the dichroic sheet 3290 can be a blue-transmissive and yellow-reflective film sheet, which can be used to transmit light with a wavelength between 400 nm and 500 nm, and the transmittance can be greater than or equal to 90%, for example, the transmittance can be 90%, 92%, 95%, 98%, and the like. The blue-transmissive and yellow-reflective film can also be used to reflect light with a wavelength between 500 nm and 780 nm, and the reflectance can be greater than or equal to 90%, for example, the reflectance can be 90%, 92%, 95%, 98%, and the like.

[0070] Specifically, the researchers can determine the specific transmission and reflection characteristics of the dichroic sheet 3290 according to the wavelength interval in which the first sub-laser L21 and the second sub-laser L22 are located and the exit direction of the N-way third laser L3. The present embodiment is not limited in this regard.

[0071] The present embodiment uses a wavelength combining method to combine the N*2-way second laser L2, which can polarize and combine the N*2-way second laser L2 into N-way third laser L3, that is, the N*2 light spots can be compressed into N light spots. The present embodiment can reduce the overall light spot size of the N*2-way second laser L2, thereby reducing the size of the optical elements in the light collecting unit 340, which is conducive to the miniaturization design of the light source device 100. In addition, the focused laser J in the present embodiment is mixed by two lasers of different wavelengths, so that the focused laser J can have more rich color selection, which can enrich the application scenarios of the laser lighting device when the light source device 100 is configured in the laser lighting device, and improve its product competitiveness.

[0072] In the present embodiment, the light collecting unit 340 can include a first light collecting mirror 3410 and a second light collecting mirror 3430, which are sequentially arranged on the optical path of the N-way third laser L3, and are used to focus and converge the N-way third laser L3 to form a focused laser J. The first light collecting mirror 3410 is used to focus the N-way third laser L3 in the fast axis direction of the third laser L3 corresponding light spot, and the second light collecting mirror 3430 is used to focus the N-way third laser L3 in the slow axis direction of the third laser L3 corresponding light spot. Therefore, the present embodiment can improve the focusing effect of the N-way third laser L3 by arranging two light collecting mirrors to focus the fast and slow axis directions of the N-way third laser L3. Specifically, the first light collecting mirror 3410 and the second light collecting mirror 3430 are both cylindrical mirrors, for example, double-concave cylindrical mirrors, flat-convex cylindrical mirrors, and the like, which are not limited in the present embodiment.

[0073] It should be noted that the focused laser J emitted through the second condenser lens 3430 has some stray light in the fast axis direction of its corresponding spot, which affects the quality of the light rays of the focused laser J. To eliminate the stray light, in this embodiment, an optical fiber 40 is arranged on the optical path of the focused laser J. The optical fiber 40 has a corresponding coupling-in end 410 and a coupling-out end 430. The coupling-in end 410 can be arranged at the focal point of the second condenser lens 3430, so that the focused laser J emitted through the second condenser lens 3430 can be fully coupled into the optical fiber 40. After the focused laser J propagates through the optical fiber 40, it is emitted through the coupling-out end 430. Specifically, the optical fiber 40 can be a quartz optical fiber, a full-plastic optical fiber, or the like, which is not limited in this embodiment.

[0074] In this embodiment, the collimation module 50 is arranged on the optical path of the focused laser J emitted through the optical fiber 40, and is used to collimate the focused laser J. Specifically, the collimation module 50 can include one or more collimation lenses (not shown in the figure). The collimation lenses can be plano-convex lenses or double-convex lenses, which are not limited in this embodiment.

[0075] The present application provides a light source device 100 and a laser device 200 configured with the light source device 100. The light source device 100 can include a laser module 10, a reflection module 20, a condensing module 30, an optical fiber 40, and a collimation module 50. The laser module 10 can include N laser units 120, each of which is used to generate two paths of first laser L1. N is a positive integer greater than 1. The reflection module 20 can include N reflection units 250, which are arranged one-to-one on the optical path of the two paths of first laser L1 generated by the N laser units 120. Each reflection unit 250 is used to reflect the corresponding two paths of first laser L1 to form two paths of second laser L2. The condensing module 30 is arranged on the optical path of N*2 paths of second laser L2, and is used to focus N*2 paths of second laser L2 to form one path of focused laser J. The optical fiber 40 has a coupling-in end 410 and a coupling-out end 430. The coupling-in end 410 is arranged on the optical path of the focused laser J. After the focused laser J propagates through the optical fiber 40, it is emitted through the coupling-out end 430. The collimation module 50 is arranged on the optical path of the focused laser J emitted through the optical fiber 40, and is used to collimate the focused laser J.

[0076] The embodiment of the present application provides a light source device 100, which can include a laser module 10, a reflection module 20, a light collection module 30, an optical fiber 40 and a collimation module 50. In one aspect, since the focused laser J is obtained by focusing and combining the N*2 second lasers L2 by the light collection module 30, the overall power of the focused laser J can be improved. In another aspect, the present application sets the optical fiber 40 on the light path of the focused laser J between the light collection module 30 and the collimation module 50, so that when the focused laser J is transmitted in the optical fiber 40, the stray light with a propagation angle greater than the critical angle of total reflection of the optical fiber 40 can be separated from the core layer of the optical fiber 40, so as to filter out the stray light in the focused laser J. In the subsequent light path, after the collimation module 50 collimates the focused laser J, a stray light-free and boundary clear light spot can be obtained, so as to improve the beam quality of the focused laser J.

[0077] In the present application, some terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components by name difference, but by functional difference. As mentioned throughout the specification and claims, "including" is an open term, which should be interpreted as "including but not limited to"; "approximately" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0078] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to simplify the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0079] In the present application, unless otherwise explicitly specified or limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, or only surface contact. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0080] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0081] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions out of the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light source device, characterized in that, include: A laser module includes N laser units, each of which generates two first laser beams, where N is a positive integer greater than 1. The reflection module includes N reflection units, each of which corresponds to one of the two first laser beams generated by the N laser units. Each reflection unit is used to reflect the two corresponding first laser beams to form two second laser beams. A focusing module is set on the optical path of the N*2 second lasers to focus the N*2 second lasers into a single focused laser. An optical fiber has an input end and an output end. The input end is located in the optical path of the focused laser. The focused laser propagates through the optical fiber and is emitted through the output end. as well as The collimation module is set in the optical path of the focused laser emitted through the optical fiber and is used to collimate the focused laser.

2. The light source device according to claim 1, characterized in that, The focusing module includes a beam combining unit and a beam focusing unit. The beam combining unit is arranged on the optical path where the N*2 second lasers are located, and is used to combine the N*2 second lasers to generate N third lasers. The focusing unit is arranged on the optical path of the N third lasers to focus the N third lasers to form a single focused laser.

3. The light source device according to claim 2, characterized in that, Each of the two second lasers formed by the reflection unit includes a first sub-laser and a second sub-laser, and the first sub-spot corresponding to the first sub-laser and the second sub-spot corresponding to the second sub-laser are arranged at intervals along the slow axis direction of the first sub-spot; The N first sub-spots corresponding to the N paths of the first sub-lasers formed by the N reflection units are arranged at intervals along the fast axis direction of the first sub-spots, and the N second sub-spots corresponding to the N paths of the second sub-lasers formed by the N reflection units are arranged at intervals along the fast axis direction of the first sub-spots.

4. The light source device according to claim 3, characterized in that, The first sub-laser and the second sub-laser are both polarized in the first polarization state; the beam combining unit includes a half-wave plate, a first reflecting mirror, and a polarizer; The polarizer is disposed on the optical path where the N-path first sub-laser is located, and the first reflector is disposed on the optical path where the N-path second sub-laser is located, for reflecting the N-path second sub-laser to the polarizer. The polarizer performs polarization combining on the N-path first sub-laser and the N-path second sub-laser to generate the N-path third laser. The half-wave plate is disposed on the optical path of the first sub-laser in the N-path; or, the half-wave plate is disposed on the optical path of the second sub-laser in the N-path. The half-wave plate is used to adjust the polarization state of the laser from a first polarization state to a second polarization state, wherein the second polarization state and the first polarization state are orthogonal linear polarization states.

5. The light source device according to claim 3, characterized in that, The center wavelength of the first sub-laser is a first wavelength, and the wavelength of the second sub-laser is a second wavelength, which is different from the first wavelength; the light combining unit includes a second reflector and a dichroic filter; The dichroic filter is disposed on the optical path of the N-path first sub-laser, and the second reflector is disposed on the optical path of the N-path second sub-laser, for reflecting the N-path second sub-laser to the dichroic filter. The dichroic filter performs wavelength combination on the N-path first sub-laser and the N-path second sub-laser to generate the N-path third laser.

6. The light source device according to claim 2, characterized in that, The focusing unit includes a first focusing mirror and a second focusing mirror, which are sequentially arranged on the optical paths of the N-path third laser beams. The first condenser lens is used to focus the N-path third laser beams along the fast axis of the corresponding spot of the third laser beam, and the second condenser lens is used to focus the N-path third laser beams along the slow axis of the corresponding spot of the third laser beam.

7. The light source device according to claim 6, characterized in that, Both the first condenser lens and the second condenser lens are cylindrical lenses.

8. The light source device according to any one of claims 1 to 7, characterized in that, The two first laser beams generated by the same laser unit are arranged at intervals along the slow axis of the first laser beams. The projections of the first laser beams corresponding to different laser units onto the slow axis of the first laser beams do not overlap.

9. The light source device according to any one of claims 1 to 7, characterized in that, Each of the laser units includes a laser chip, a fast-axis collimating lens, and a slow-axis collimating lens; The laser chip is used to generate two paths of the first laser. The fast-axis collimating lens and the slow-axis collimating lens are sequentially arranged in the optical paths of the two paths of the first laser, and are used to collimate the two paths of the first laser respectively.

10. The light source device according to claim 9, characterized in that, The N laser chips are arranged sequentially along the slow axis direction of the first spot corresponding to the first laser. Each of the laser chips is provided with an output port, through which the first laser is emitted. The projections of the output ports corresponding to different laser chips onto the slow axis direction of the first laser spot do not coincide.

11. The light source device according to claim 10, characterized in that, The optical path lengths of the first lasers between the plurality of the aforementioned reflective units and their corresponding laser chips are equal.

12. The light source device according to claim 9, characterized in that, The N laser chips are arranged sequentially along the slow axis direction of the first spot corresponding to the first laser. Each of the laser chips is provided with an output port, and the first laser is emitted through the output port. The projections of the output ports corresponding to different laser chips on the slow axis direction of the first laser spot coincide. Each of the laser units further includes a third reflector, which is disposed on the optical path of the two first lasers located between the fast-axis collimating lens and the slow-axis collimating lens; the optical path lengths of the first lasers between the multiple third reflectors and their corresponding laser chips are all different.

13. A laser device, characterized in that, include: case; as well as The light source device as described in any one of claims 1 to 12, wherein the light source device is disposed within the housing.

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