Tunable white light laser system

Abstract

The invention discloses a tunable white laser system, which belongs to the technical field of laser, and comprises a light source emitting device, the light source emitting device is coupled with a laser beam combining device, the light source emitting device comprises a first light source, a second light source and a third light source, the first light source is a cyan laser source or a green laser source, and the second light source is a third light source. The second light source is a red light laser source, the third light source is a cyan light laser source or a green light laser source, the third light source and the first light source are different in color, and the laser beam combining device comprises a beam splitter assembly and an optical fiber beam combining assembly. According to the tunable white light laser system, the light source with the wave band above blue light is adopted to generate white light laser, complex devices such as a super-continuum spectrum generation device and a white light extraction device are not needed, the system has the advantages of being adjustable in real-time chromaticity and easy to integrate, blue light pollution to the external environment in the white light generation process is avoided, and the system is suitable for large-scale popularization and application. The method has stronger condition adaptability and practicability, and the stability of mixed light is good.

Description

Technical Field

[0001] The invention relates to the field of laser technology, and in particular to a tunable white light laser system. Background Art

[0002] White light lasers have spatial coherence and a wide spectral range, and are widely used in color display, special lighting, surgical diagnosis and other fields.

[0003] At present, in lighting, medical treatment and engineering, white light is usually generated by mixing lasers of different wavelengths in a certain proportion. Common methods include: coating a layer of fluorescent material of other wavelengths on the blue light LED chip. This process has low production efficiency and cannot adapt to mass production in modern industry. The irregular shape of the powder layer will cause the light output of a single white light LED to be unevenly distributed in space; or the three-primary color LED mixing method, where all the light used for lighting comes from light-emitting diodes. Through the principle of spatial color mixing, white light display is obtained by matching in appropriate proportions. However, its installation structure is more complicated, and the driving voltage, luminous efficiency and color matching characteristics of each color LED are different, which makes the circuit implementation more complicated. At the same time, the aging degree of each color LED is different over time, resulting in differences in light decay and discoloration, making the stability of the mixed light poor.

[0004] However, in the prior art, no matter which of the above methods is used, blue light and lasers with wavelengths below it are involved in the process of generating white light. It is difficult to prevent the accompanying output of blue light and light with wavelengths below it in the process of generating white light, so it is easy to cause light pollution in the use place and cause damage to human eyes. Therefore, it is necessary to design a tunable white light laser system that uses a light source with wavelengths above blue light to generate white light laser to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a tunable white light laser system, which generates white light laser by adopting a light source with a wavelength band above blue light, so as to solve the technical problem that in the process of generating white light in the prior art, lasers with wavelength bands below blue light are easily output, thus causing light pollution.

[0006] To achieve the above-mentioned purpose, the present invention provides a tunable white light laser system, including a light source emitting device, which is coupled to a laser beam combining device, the light source emitting device includes a first light source, a second light source and a third light source, the first light source is a cyan laser source or a green laser source, the second light source is a red laser source, the third light source is a cyan laser source or a green laser source, and the third light source has a different color from the first light source, and the laser beam combining device includes a beam splitter assembly and a fiber beam combining assembly.

[0007] Preferably, the first light source, the second light source and the third light source are LD light sources or solid-state lasers, and the lasers generated by the first light source, the second light source and the third light source are independently adjustable.

[0008] Preferably, the beam splitter assembly includes a beam splitter, which is arranged in parallel along the collimated light path, corresponds to the light source emitting device, and the laser beam and the collimated light path generated by the beam splitter and the light source emitting device are both at 45°.

[0009] Preferably, the optical fiber bundle combining assembly comprises an optical fiber, one end of the optical fiber is provided with a plurality of light input ports, and the other end is provided with a light output port, and the light input ports are coupled and connected with the light source emitting device accordingly.

[0010] Preferably, the LD light source is a gallium nitride semiconductor laser or an aluminum nitride semiconductor laser.

[0011] Preferably, the solid laser is a combination of a laser crystal and a nonlinear crystal, doped with Pr 3+ 、Dy 3+ A type of laser crystal or self-doubling crystal made of ionic oxide or fluoride.

[0012] Preferably, the wavelength of the laser emitted by the cyan laser source is 480 to 500 nm, the wavelength of the laser emitted by the green laser source is 500 to 580 nm, and the wavelength of the laser emitted by the red laser source is 620 to 680 nm.

[0013] Therefore, the present invention adopts the above-mentioned tunable white light laser system, uses at least two independently tunable laser light sources to independently generate multiple laser beams with wavelengths greater than 480nm, and based on the principle of spatial color mixing, adjusts the power ratio and / or wavelength of multiple laser beams, and uses multiple laser beams to combine and mix to obtain white light lasers with different chromaticities and powers. Compared with the three-primary color laser mixing and LED fluorescent luminescence technology commonly used in the prior art, the white light laser system uses a light source with a wavelength band above blue light to generate white light lasers, does not require complex devices such as supercontinuum spectrum generation devices and white light extraction, has the advantages of real-time chromaticity adjustment and easy integration, avoids blue light pollution to the external environment during the process of generating white light, has stronger adaptability to conditions and practicality, and has good stability of the mixed light, which can be applied to the field of high-power white light lighting display. In addition, the components that are easy to integrate also provide convenience for the high integration of white light devices.

[0014] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of an embodiment of a tunable white light laser system of the present invention; Figure 2 is another structural schematic diagram of an embodiment of a tunable white light laser system of the present invention; Figure 3 is another structural schematic diagram of an embodiment of a tunable white light laser system of the present invention; Figure 4 is a spectrum diagram of the laser emitted by the light source emitting device in Example 1 of the present invention; Figure 5 is a spectrum diagram of the laser emitted by the light source emitting device in Example 2 of the present invention; Figure 6 is a spectrum diagram of the laser emitted by the light source emitting device in Example 3 of the present invention; Figure 7 is a spectrum diagram of the laser emitted by the light source emitting device in Example 4 of the present invention; Figure 8 is a spectrum diagram of the laser emitted by the light source emitting device in Example 5 of the present invention; Fig. 9 is a spectrum diagram of the laser emitted by the light source emitting device in Example 6 of the present invention; Fig.10 is a spectrum diagram of the laser emitted by the light source emitting device in Example 7 of the present invention; Fig.11 Chromaticity diagrams of white light generated in Examples 1 to 7 for the tunable white light laser system of the present invention.

[0016] Reference numerals 100, light source emitting device; 110, first light source; 120, second light source; 130, third light source; 200, laser beam combining device; 210, beam splitter; 211, first beam splitter; 212, second beam splitter; 220, optical fiber; 300, white light laser. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0018] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0019] Example like Figures 1 to 3As shown, the present invention provides a tunable white light laser system, including a light source emitting device 100, which is coupled to a laser beam combining device 200. The laser beam combining device 200 can guide the laser light beams generated by the laser emitting device to the same collimated optical path, so that the laser light beams are combined on the collimated optical path to form a white light laser 300. The combined white light laser 300 is emitted along the collimated optical path to the outside of the white light laser system to form a stable white light laser 300 output.

[0020] The light source emitting device 100 includes a first light source 110, a second light source 120 and a third light source 130. The first light source 110 is a cyan laser source or a green laser source, the second light source 120 is a red laser source, the third light source 130 is a cyan laser source or a green laser source, and the third light source 130 has a different color from the first light source 110. The laser beams generated by the first light source 110, the second light source 120 and the third light source 130 are incident into the laser beam combining device 200 along different optical paths, are controlled by the laser beam combining device 200 to be combined into a collimated optical path, and are mixed on the collimated optical path to form a white light laser 300.

[0021] The first light source 110, the second light source 120 and the third light source 130 are LD light sources or solid lasers. The lasers generated by the first light source 110, the second light source 120 and the third light source 130 are independently adjustable. Based on the principle of spatial color mixing, the different chromaticities and brightness of the white light of the system can be adjusted by controlling their power ratio and / or wavelength, and free switching between cold white light, natural white light and warm white light can also be achieved. The way in which each light source adjusts the output laser power and wavelength within the output band can be any existing adjustment method, wherein the adjustment method can vary according to the type of light source: When the first light source 110, the second light source 120 and the third light source 130 are LD light sources, the LD light source can adjust the output power of the LD light source by controlling the input current, and can achieve continuous tuning of the output wavelength of the LD light source within the working band by controlling the working temperature or locking the frequency; When the first light source 110, the second light source 120 and the third light source 130 are solid-state lasers, the output power of the solid-state laser can be controlled by adjusting the power of the pump light source, and the output wavelength of the laser can be adjusted within the working band by adjusting the output wavelength of the pump light source or changing the coating method of the laser resonant cavity.

[0022] The LD light source is a gallium nitride semiconductor laser or an aluminum nitride semiconductor laser, and the gallium nitride semiconductor laser or the aluminum nitride semiconductor laser can generate a cyan laser or a green laser with a wavelength of more than 480 nm.

[0023] Solid-state lasers are laser crystals combined with nonlinear crystals and doped with Pr 3+、Dy 3+ One of the laser crystals of oxides or fluorides of ions and self-frequency doubling crystals. In solid-state lasers, the output of lasers in the target band can be obtained by combining laser crystals with nonlinear crystals, wherein the pump light in the resonant cavity of the solid-state laser excites the laser crystal to produce fundamental frequency lasers, and then the fundamental frequency lasers are converted into frequency-doubled lasers with a wavelength in the target band through nonlinear optical crystals. For example, solid-state lasers use crystals that can excite near-infrared lasers as laser crystals, such as Nd:YAG, Nd:YVO4, Yb:YAG, etc. After obtaining the near-infrared laser, frequency-doubled laser output is generated by using intracavity or extracavity frequency doubling through nonlinear crystals.

[0024] Solid-state lasers use Pr-doped 3+ 、Dy 3+ Plasma oxides or fluorides are used as laser crystals, such as Pr:YAP, Pr:YLiF4, Dy:LuLiF4 crystals, which directly convert pump light into stable high-power cyan, green or red laser output. Solid-state lasers directly obtain laser output in the target band by using self-doubling crystals to double the fundamental frequency light. For example, solid-state lasers use Nd doped 3+ , Yb 3+ 、Tm 3+ The calcium yttrium borate crystal with isotropic ions is used as a self-frequency doubling crystal to obtain stable and high-power green or cyan laser output.

[0025] The laser wavelength emitted by the cyan laser source is 480 to 500 nm, the laser wavelength emitted by the green laser source is 500 to 580 nm, and the laser wavelength emitted by the red laser source is 620 to 680 nm.

[0026] The laser beam combining device 200 includes a beam splitter 210 assembly and an optical fiber 220 beam combining assembly. The beam splitter 210 assembly is used to guide the laser beams to the same collimated optical path. The optical fiber 220 beam combining assembly can guide the laser beams to mix and combine in the optical fiber 220 into a white light laser 300. The beam splitter 210 assembly includes a beam splitter 210, which is arranged in parallel along the collimated optical path, and the beam splitter 210 corresponds to the light source emitting device 100, and the laser beams and the collimated optical path generated by the beam splitter 210 and the light source emitting device 100 are both 45°, and the laser beam is incident on the reflective mirror surface of the beam splitter 210 at an incident angle of 45°, and the direction of the optical path is changed and reflected into the collimated optical path.

[0027] The optical fiber 220 beam combining assembly includes an optical fiber 220, one end of which is provided with a plurality of light input ports, and the other end of which is provided with a light output port, and the light input port is coupled and connected to the light source emitting device 100 accordingly. The plurality of laser beams generated by the light source emitting device 100 enter the optical fiber 220 from the light input port, and after the plurality of laser beams are mixed and beam combined in the optical fiber 220, the mixed white light laser 300 is directly output through the light output port at the output end of the optical fiber 220.

[0028] Embodiment 1 The laser beam combining device 200 is a beam splitter 210 assembly, and the beam splitter 210 assembly is a beam splitter 210, which is arranged in parallel along the collimated optical path, and the mirror surface of the beam splitter 210 corresponds to the first light source 110 and the second light source 120, and the laser beams generated by the beam splitter 210 and the first light source 110 and the second light source 120 and the collimated optical path are all 45°. When the laser beams generated by the first light source 110 and the second light source 120 are incident on the reflective mirror surface of the beam splitter 210 at an incident angle of 45°, the direction of the optical path will change by 90° and reflect into the collimated optical path, thereby combining on the collimated optical path to form the white light laser 300.

[0029] Example 1 The tunable white light laser system comprises a first light source 110, a second light source 120 and a laser beam combining device 200, wherein the laser beam combining device 200 is a beam splitter 210 assembly. The first light source 110 is a green light LD or a green light laser capable of outputting a green light laser with a central wavelength of 506 nm, and the second light source 120 is a red light LD or a red light laser capable of outputting a red light laser with a central wavelength of 650 nm. The beam splitter 210 assembly comprises a beam splitter 210, wherein the first light source 110 and the second light source 120 are respectively arranged on both sides of the beam splitter 210, and the beam splitter 210 is fixedly mounted at the vertical intersection of the light beams generated by the first light source 110 and the second light source 120, and is 45° to the two incident light beams. The red light beam emitted by the second light source 120 is incident on the red light reflecting mirror surface of the beam splitter 210 at an incident angle of 45°, and the light path direction is changed by 90°, and merges with the green light beam emitted by the first light source 110 which is orthogonal to the incident direction of the red light beam, thereby combining and mixing on the collimated light path. In addition, the output power of the first light source 110 and the second light source 120 is adjusted so that the peak power ratio of the green laser and the red laser is maintained at 1:3, thereby ensuring that the red laser and the green laser are combined and mixed to form the white laser 300. Figure 4 The spectrum curve of the mixed light source of the first light source 110 and the second light source 120 working together is obtained. The mixed laser is obtained by applying the chromaticity synthesis principle to finally display the white light chromaticity coordinates of (0.4409, 0.3932) in the standard chromaticity system 1931cie. Fig.11 As shown in G1-R3.

[0030] Example 2 The first light source 110 is a green LD or green laser capable of outputting a green laser with a central wavelength of 506 nm, and the second light source 120 is a red LD or red laser capable of outputting a red laser with a central wavelength of 632 nm. The tunable white light laser system in Example 2 is configured such that the peak intensity ratio of the green laser generated by the first light source 110 and the red laser generated by the second light source 120 is maintained at 1:1.5 by adjusting the output power of the first light source 110 and the second light source 120 respectively, thereby obtaining a stable white light laser 300. Figure 5 is the spectrum curve of the mixed light source of the first light source 110 and the second light source 120 working together. The obtained mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.4642, 0.4139) in the standard chromaticity system 1931cie. Fig.11 As shown in G1-R1.5.

[0031] Example 3 The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, and the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 632 nm. The tunable white light laser system in Example 3 is configured such that the peak intensity ratio of the cyan laser generated by the first light source 110 and the red laser generated by the second light source 120 is maintained at 5:2 by adjusting the output power of the first light source 110 and the second light source 120 respectively, thereby obtaining a stable white light laser 300. Figure 6 is the spectrum curve of the mixed light source of the first light source 110 and the second light source 120 working together. The obtained mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.2582, 0.2759) in the standard chromaticity system 1931cie. Fig.11 As shown in C5-R2.

[0032] Embodiment 2 The laser beam combining device 200 is a beam splitter 210 assembly, and the beam splitter 210 includes a first beam splitter 211 and a second beam splitter 212. The first beam splitter 211 and the second beam splitter 212 are distributed in parallel along the collimated light path. The mirror surface of the first beam splitter 211 corresponds to the first light source 110 and the second light source 120. The laser beams and the collimated light paths generated by the first beam splitter 211 and the first light source 110 and the second light source 120 are both at 45°. The second beam splitter 212 corresponds to the third light source 130. The laser beams and the collimated light paths generated by the second beam splitter 212 and the third light source 130 are both at 45°. When the laser light beams generated by the first light source 110 and the second light source 120 are incident on the reflecting mirror surface of the first beam splitter 211 at an incident angle of 45°, the direction of the light path will change 90° and reflect into the collimated light path, and the synthesized laser light beam will be incident on the reflecting mirror surface of the second beam splitter 212 at an incident angle of 45°, and the laser light beam generated by the third light source 130 will also be incident on the reflecting mirror surface of the second beam splitter 212 at an incident angle of 45°. After being reflected by the second beam splitter 212, the laser light beams enter the collimated light path, thereby being combined on the collimated light path to form a white light laser 300.

[0033] Example 4 The tunable white light laser system includes a first light source 110, a second light source 120, a third light source 130 and a laser beam combining device 200, wherein the laser beam combining device 200 is a beam splitter 210 component. The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 632 nm, and the third light source 130 is a green LD or a green laser capable of outputting a green laser with a central wavelength of 506 nm. The beam splitter 210 assembly includes a first beam splitter 211 and a second beam splitter 212. The first beam splitter 211 and the second beam splitter 212 are arranged in parallel along the collimated light path. The two sides of the mirror surface of the first beam splitter 211 correspond to the first light source 110 and the second light source 120 respectively, and are 45° with the two incident light beams at the vertical intersection of the light beams generated by the first light source 110 and the second light source 120. The mirror surface of the second beam splitter 212 is arranged parallel to the mirror surface of the first beam splitter 211, and is 45° with the light beam generated by the third light source 130. Among them, the red light beam emitted by the second light source 120 is incident on the reflective mirror surface of the first beam splitter 211 at an incident angle of 45°, and the direction of the light path changes by 90° to enter the collimated light path. The green light beam emitted by the third light source 130 is incident on the reflective mirror surface of the second beam splitter 212 at an incident angle of 45°, and the direction of the light path changes by 90° to enter the collimated light path. After being guided by the first beam splitter 211 and the second beam splitter 212, the red light beam generated by the second light source 120 and the green light beam generated by the third light source 130 are combined and mixed with the cyan light beam generated by the first light source 110 on the collimated light path. In addition, the first light source 110, the second light source 120 and the third light source 130 adjust the output power so that the peak power ratio of the cyan laser, the green laser and the red laser is maintained at 1: 1: 1.5, thereby obtaining a stable white light laser 300. Figure 7 The spectrum curve of the mixed light source of the first light source 110, the second light source 120 and the third light source 130 working together is obtained. The mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.3646, 0.3771) in the standard chromaticity system 1931cie. Fig.11 As shown in C1-R1.5-G1.

[0034] Example 5 The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 632 nm, and the third light source 130 is a green LD or a green laser capable of outputting a green laser with a central wavelength of 506 nm. In this example, the first light source 110, the second light source 120, and the third light source 130 adjust the output power so that the peak power ratio of the cyan laser, the green laser, and the red laser is maintained at 3: 5:10, thereby obtaining a stable white light laser 300. Figure 8 The spectrum curve of the mixed light source of the first light source 110, the second light source 120 and the third light source 130 working together is obtained. The mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.4421, 0.409) in the standard chromaticity system 1931cie. Fig.11 As shown in C3-R10-G5.

[0035] Example 6 The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 661 nm, and the third light source 130 is a green LD or a green laser capable of outputting a green laser with a central wavelength of 506 nm. In this example, the first light source 110, the second light source 120, and the third light source 130 adjust the output power so that the peak power ratio of the cyan laser, the green laser, and the red laser is maintained at 1: 1:5, thereby obtaining a stable white light laser 300. Fig. 9 The spectrum curve of the mixed light source of the first light source 110, the second light source 120 and the third light source 130 working together is obtained. The mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.3616, 0.3726) in the standard chromaticity system 1931cie. Fig.11 As shown in C1-R5-G1.

[0036] Example 7 The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 632 nm, and the third light source 130 is a green LD or a green laser capable of outputting a green laser with a central wavelength of 532 nm. In this example, the first light source 110, the second light source 120, and the third light source 130 adjust the output power so that the peak power ratio of the cyan laser, the green laser, and the red laser is maintained at 1.5: 1:3, thereby obtaining a stable white light laser 300. Fig.10The spectrum curve of the mixed light source of the first light source 110, the second light source 120 and the third light source 130 working together is obtained. The mixed laser light source uses the chromaticity synthesis principle to obtain the final white light chromaticity coordinates (0.4281, 0.3999) in the standard chromaticity system 1931cie. Fig.11 As shown in C1.5-R3-G1.

[0037] Embodiment 3 The laser beam combining device 200 is an optical fiber 220 beam combining assembly, and a plurality of light input ports are provided at the incident end of the optical fiber 220 of the optical fiber 220 beam combining assembly, and the light input ports of the optical fiber 220 are respectively coupled and connected with the first light source 110, the second light source 120 and the third light source 130. When the first light source 110, the second light source 120 and the third light source 130 generate lasers, the laser beam combining device 200 guides the laser beams into the optical fiber 220 of the optical fiber 220 beam combining assembly, and after mixing and combining in the optical fiber 220, directly outputs the mixed white light laser 300 through the light output port at the output end of the optical fiber 220.

[0038] Example 8 The tunable white light laser system includes a first light source 110, a second light source 120, a third light source 130 and a laser beam combining device 200, wherein the laser beam combining device 200 is a beam combining component of an optical fiber 220. The first light source 110 is a cyan LD or a cyan laser capable of outputting a cyan laser with a central wavelength of 488 nm, the second light source 120 is a red LD or a red laser capable of outputting a red laser with a central wavelength of 632 nm, and the third light source 130 is a green LD or a green laser capable of outputting a green laser with a central wavelength of 532 nm. In the laser beam combining device 200, the incident end of the optical fiber 220 is provided with three light input ports, and the output end of the optical fiber 220 is provided with one output port. Among them, the laser light beams generated by the first light source 110, the second light source 120 and the third light source 130 are coupled and connected to the three light input ports respectively. The three laser light beams enter the optical fiber 220 from the three light input ports respectively, and are combined and mixed inside the optical fiber 220. Finally, the mixed white light laser 300 is output from the output port at the output end of the optical fiber 220.

[0039] Therefore, the present invention adopts the above-mentioned tunable white light laser system, uses at least two independently tunable laser light sources to independently generate multiple laser beams with wavelengths greater than 480nm, and based on the principle of spatial color mixing, adjusts the power ratio and / or wavelength of multiple laser beams, and uses multiple laser beams to combine and mix to obtain white light lasers with different chromaticities and powers. Compared with the three-primary color laser mixing and LED fluorescent luminescence technology commonly used in the prior art, the white light laser system uses a light source with a wavelength band above blue light to generate white light lasers, does not require complex devices such as supercontinuum spectrum generation devices and white light extraction, has the advantages of real-time chromaticity adjustment and easy integration, avoids blue light pollution to the external environment during the process of generating white light, has stronger adaptability to conditions and practicality, and has good stability of the mixed light, which can be applied to the field of high-power white light lighting display. In addition, the components of the present invention that are easy to integrate also provide convenience for the high integration of white light devices.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A tunable white light laser system, characterized in that: It includes a light source emitting device, which is coupled to a laser beam combining device. The light source emitting device includes a first light source, a second light source and a third light source. The first light source is a cyan laser source or a green laser source, the second light source is a red laser source, the third light source is a cyan laser source or a green laser source, and the third light source has a different color from the first light source. The laser beam combining device includes a beam splitter assembly and a fiber beam combining assembly.

2. The tunable white light laser system according to claim 1, characterized in that: The first light source, the second light source and the third light source are LD light sources or solid lasers, and the lasers generated by the first light source, the second light source and the third light source are independently adjustable.

3. The tunable white light laser system according to claim 1, characterized in that: The beam splitter assembly includes a beam splitter, which is arranged in parallel along the collimated light path and corresponds to the light source emitting device, and the laser beam and the collimated light path generated by the beam splitter and the light source emitting device are both at 45°.

4. The tunable white light laser system according to claim 1, characterized in that: The optical fiber bundle combining assembly comprises an optical fiber, one end of which is provided with a plurality of light input ports, and the other end of which is provided with a light output port, and the light input ports are coupled and connected with the light source emitting device accordingly.

5. The tunable white light laser system according to claim 2, characterized in that: The LD light source is a gallium nitride semiconductor laser or an aluminum nitride semiconductor laser.

6. The tunable white light laser system according to claim 2, characterized in that: The solid laser is a combination of laser crystal and nonlinear crystal, doped with Pr 3+ 、Dy 3+ A type of laser crystal or self-doubling crystal made of ionic oxide or fluoride.

7. The tunable white light laser system according to claim 1, characterized in that: The wavelength of the laser emitted by the cyan laser source is 480 to 500 nm, the wavelength of the laser emitted by the green laser source is 500 to 580 nm, and the wavelength of the laser emitted by the red laser source is 620 to 680 nm.

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