White light semiconductor laser
By using alternating green and red light source components in a semiconductor laser, combined with a layout of reflectors and beam expanders, the problem of low space utilization in semiconductor lasers is solved, achieving both size reduction and brightness improvement.
Patent Information
- Application Number
- CN202520007826.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing semiconductor lasers have low space utilization and are too large in size.
The system employs an alternating arrangement of green and red light source components, and utilizes a combination of multiple reflectors and beam expanders, along with fast-axis collimation and slow-axis beam expansion techniques, to improve space utilization and beam brightness.
This effectively reduces the size of the semiconductor laser and improves the brightness of white light.
Smart Images
Figure CN223625410U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser technology, specifically to a white semiconductor laser. Background Technology
[0002] Semiconductor lasers possess advantages such as small size, high efficiency, and long lifespan, making them the primary pump source for fiber lasers and solid-state lasers, and a major component of direct semiconductor lasers. Currently, semiconductor lasers are widely used in various fields such as laser detection, laser medicine, laser display, and 3D printing. However, commonly used semiconductor lasers on the market have low space utilization and are excessively large in size. Summary of the Invention
[0003] This application provides a white semiconductor laser that can improve the space utilization of semiconductor lasers and reduce their size.
[0004] In a first aspect, the white semiconductor laser provided in this application includes:
[0005] Multiple green light source components are provided, wherein the green light source components are used to emit green light beams in a first direction, and the multiple green light source components are arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction;
[0006] Multiple red light source components are provided, wherein the red light source components are used to emit red light beams in a first direction, the laser emission direction of the green light source components is opposite to that of the red light source components, the multiple red light source components are arranged at intervals along a second direction, and the multiple green light source components and the multiple red light source components are arranged alternately.
[0007] Multiple first reflectors are arranged at intervals along a second direction. Each of the multiple first reflectors corresponds to a multiple green light source component. The first reflectors and their corresponding green light source components are arranged sequentially in a first direction. The first reflectors are used to reflect the green light beam emitted by the green light source component to the second direction.
[0008] Multiple second reflectors are arranged at intervals along a second direction. Each of the multiple second reflectors corresponds to one of the multiple red light source components. The second reflectors and their corresponding red light source components are arranged sequentially in a first direction. The second reflectors are used to reflect the red light beam emitted by the red light source components to the second direction.
[0009] A third reflecting mirror is arranged at intervals along a second direction with a plurality of first reflecting mirrors, and the third reflecting mirror is used to reflect the green light beam reflected by the plurality of first reflecting mirrors to the first direction;
[0010] A fourth reflecting mirror is arranged at intervals along a second direction with a plurality of second reflecting mirrors, and the fourth reflecting mirror is used to reflect the red light beam reflected by the plurality of second reflecting mirrors to a first direction;
[0011] The fifth reflector, the fourth reflector, the third reflector and the fifth reflector are arranged in sequence in the first direction, and the fifth reflector is used to reflect the green light beam reflected by the third reflector and the red light beam reflected by the fourth reflector to the second direction;
[0012] A blue light module, the blue light module being used to emit a blue light beam in a second direction;
[0013] A focusing lens and an output optical fiber, wherein the focusing lens is used to focus the blue light beam emitted by the blue light module, the red light beam reflected by the fifth reflecting mirror, and the green light beam onto the output optical fiber;
[0014] The green light source component, the second reflector, the first reflector, and the red light source component are arranged sequentially on a plane perpendicular to the second direction.
[0015] Optionally, the green light source component and the red light source component are packaged in a TO package.
[0016] Optionally, the white semiconductor laser includes a plurality of first fast-axis collimating lenses, which are spaced apart in the second direction. The plurality of green light source components correspond one-to-one with the plurality of first fast-axis collimating lenses. The green light source components, the first fast-axis collimating lenses, and the first reflector are arranged sequentially in the first direction.
[0017] Optionally, the white light semiconductor laser includes a plurality of first slow-axis beam expanders, which are spaced apart in the second direction. The plurality of green light source components correspond one-to-one with the plurality of first slow-axis beam expanders. The green light source components, the first fast-axis collimating lens, the first slow-axis beam expander, and the first reflector are arranged sequentially in the first direction.
[0018] Optionally, the white semiconductor laser includes a plurality of second fast-axis collimating mirrors, which are spaced apart in the second direction. The plurality of red light source components correspond one-to-one with the plurality of second fast-axis collimating mirrors. The red light source components, the second fast-axis collimating mirrors, and the second reflector are arranged sequentially in the first direction.
[0019] Optionally, the white light semiconductor laser includes a plurality of second slow-axis beam expanders, which are spaced apart in the second direction. The plurality of red light source components correspond one-to-one with the plurality of second slow-axis beam expanders. The red light source components, the second fast-axis collimating lens, the second slow-axis beam expander, and the second reflector are arranged sequentially in the first direction.
[0020] Optionally, the blue light module includes multiple blue light source components and multiple corresponding sixth reflectors. The blue light source components and the sixth reflectors are spaced apart in the first direction. The multiple sixth reflectors, the fifth reflector, the focusing lens, and the output optical fiber are spaced apart along the second direction. The projections of the green light source component, the second reflector, the first reflector, the red light source component, and the focusing lens on a plane perpendicular to the second direction are arranged sequentially.
[0021] Optionally, a third fast-axis collimating lens and a third slow-axis beam expander are sequentially provided between the blue light source assembly and the sixth reflector.
[0022] Optionally, a fast-axis beam shortener is provided between the fifth reflecting mirror and the focusing lens.
[0023] Optionally, the first slow-axis beam expander includes a first lens and a second lens, and the projections of the first lens, the second mirror, and the second lens onto a plane perpendicular to the second direction are arranged sequentially.
[0024] In this application, compared to related technologies, the white semiconductor laser includes multiple green light source components, which emit green light beams in a first direction. These green light source components are spaced apart along a second direction, perpendicular to the first direction. It also includes multiple red light source components, which emit red light beams in the first direction. The laser emission directions of the green light source components are opposite to those of the red light source components. These red light source components are spaced apart along the second direction, and the green and red light source components are alternately arranged. Furthermore, it includes multiple first reflectors, which are spaced apart along the second direction and correspond one-to-one with each of the green light source components. The first reflectors and their corresponding green light source components are arranged sequentially in the first direction, and the first reflectors reflect the green light beams emitted by the green light source components to the second direction. Finally, it includes multiple second reflectors, which are spaced apart along the second direction and correspond one-to-one with each of the red light source components. The second reflectors and their corresponding red light source components are arranged sequentially in the first direction, and the second reflectors reflect the red light beams emitted by the green light source components to the second direction. A red light beam emitted by the light source assembly is reflected to a second direction; a third reflector, which is arranged at intervals with multiple first reflectors along the second direction, is used to reflect the green light beams reflected by the multiple first reflectors to the first direction; a fourth reflector, which is arranged at intervals with multiple second reflectors along the second direction, is used to reflect the red light beams reflected by the multiple second reflectors to the first direction; a fifth reflector, which is arranged sequentially with the fourth, third, and fifth reflectors in the first direction, is used to reflect the green light beam reflected by the third reflector and the red light beam reflected by the fourth reflector to the second direction; a blue light module, which is used to emit a blue light beam in the second direction; a focusing lens and an output fiber, the focusing lens being used to focus the blue light beam emitted by the blue light module, the red light beam reflected by the fifth reflector, and the green light beam onto the output fiber; the green light source assembly, the second reflector, the first reflector, and the red light source assembly are arranged sequentially on a plane perpendicular to the second direction and each has an opening; a first edge sealing strip and a second edge sealing strip respectively seal the openings on both sides of the plate. This application adopts an alternating arrangement of green and red light source components, which can improve the space utilization of the semiconductor laser and reduce its size.
[0025] Furthermore, based on collimation by the fast-axis collimating lens, expanding the slow-axis beam using a slow-axis beam expander can improve the white light brightness of the semiconductor laser. Attached Figure Description
[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of the planar structure of an embodiment of a white semiconductor laser provided in this application;
[0028] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of a white semiconductor laser provided in this application. Detailed Implementation
[0029] It should be noted that the principles of this application are illustrated by example in a suitable computing environment. The following description is based on the specific embodiments of this application that are illustrated, and should not be regarded as limiting other specific embodiments not detailed herein.
[0030] In the following description of this application, "some embodiments" are referred to, which describe a subset of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subset of all possible embodiments, and may be combined with each other without conflict.
[0031] In the following description of this application, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.
[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0034] Please refer to Figures 1-2In this embodiment, the white semiconductor laser 10 includes multiple green light source components 111, multiple red light source components 121, multiple first reflectors 114, multiple second reflectors 124, a third reflector 151, a fourth reflector 152, a fifth reflector 153, a blue light module, a focusing lens 7, and an output fiber 8. The green light source components 111 emit green light beams in a first direction F1, and the multiple green light source components 111 are spaced apart along a second direction F2, which is perpendicular to the first direction F1. The red light source components 121 emit red light beams in the first direction F1, and the laser emission direction of the green light source components 111 is opposite to that of the red light source components 121. The multiple red light source components 121 are spaced apart along the second direction F2, and the multiple green light source components 111 and the multiple red light source components 121 are staggered. Multiple first reflectors 114 are arranged at intervals along the second direction F2, each corresponding to a multiple green light source component 111. The first reflectors 114 and their corresponding green light source components 111 are arranged sequentially along the first direction F1, and the first reflectors 114 are used to reflect the green light beam emitted by the green light source component 111 to the second direction F2. Multiple second reflectors 124 are also arranged at intervals along the second direction F2, each corresponding to a multiple red light source component 121. The second reflectors 124 and their corresponding red light source components 121 are arranged sequentially along the first direction F1, and the second reflectors 124 are used to reflect the red light beam emitted by the red light source component 121 to the second direction F2. A third reflector 151 is also arranged at intervals along the second direction F2. The third reflector 151 is used to reflect the green light beam reflected by the multiple first reflectors 114 to the first direction F1; the fourth reflector 152 and the multiple second reflectors 124 are arranged at intervals along the second direction F2, and the fourth reflector 152 is used to reflect the red light beam reflected by the multiple second reflectors 124 to the first direction F1; the fourth reflector 152, the third reflector 151 and the fifth reflector 153 are arranged sequentially in the first direction F1, and the fifth reflector 153 is used to reflect the green light beam reflected by the third reflector 151 and the red light beam reflected by the fourth reflector 152 to the second direction F2; the blue light module is used to emit a blue light beam in the second direction F2; the focusing lens 7 is used to focus the blue light beam emitted by the blue light module, the red light beam reflected by the fifth reflector 153 and the green light beam onto the output optical fiber 8.
[0035] In this embodiment, the projections of the green light source component 111, the second reflector 124, the first reflector 114, and the red light source component 121 onto the plane perpendicular to the second direction F2 are arranged in sequence.
[0036] In this embodiment, the white semiconductor laser 10 includes a plurality of first fast-axis collimating lenses 112, which are arranged at intervals in the second direction F2. A plurality of green light source components 111 correspond one-to-one with the plurality of first fast-axis collimating lenses 112. The green light source components 111, the first fast-axis collimating lenses 112, and the first reflector 114 are arranged sequentially in the first direction F1.
[0037] In this embodiment, the white semiconductor laser 10 includes a plurality of first slow-axis beam expanders 113, which are spaced apart on the second direction F2. A plurality of green light source components 111 correspond one-to-one with the plurality of first slow-axis beam expanders 113. The green light source components 111, the first fast-axis collimating lens 112, the first slow-axis beam expanders 113 and the first reflector 114 are arranged sequentially on the first direction F1.
[0038] In this embodiment, the white semiconductor laser 10 includes a plurality of second fast-axis collimating mirrors 122, which are arranged at intervals in the second direction F2. A plurality of red light source components 121 correspond one-to-one with the plurality of second fast-axis collimating mirrors 122. The red light source components 121, the second fast-axis collimating mirrors 122, and the second reflector 124 are arranged sequentially in the first direction F1.
[0039] In this embodiment, the white semiconductor laser 10 includes a plurality of second slow-axis beam expanders 123, which are spaced apart on the second direction F2. A plurality of red light source components 121 correspond one-to-one with the plurality of second slow-axis beam expanders 123. The red light source components 121, the second fast-axis collimating lens 122, the second slow-axis beam expanders 123 and the second reflector 124 are arranged sequentially on the first direction F1.
[0040] In this embodiment, the blue light module includes multiple blue light source components 131 and multiple corresponding sixth reflectors 134. The blue light source components 131 and the sixth reflectors 134 are spaced apart in the first direction F1. The multiple sixth reflectors 134, the fifth reflector 153, the focusing lens 7, and the output optical fiber 8 are arranged spaced apart along the second direction F2. The projections of the green light source component 111, the second reflector 124, the first reflector 114, the red light source component 121, and the focusing lens 7 on the plane perpendicular to the second direction F2 are arranged sequentially.
[0041] In this embodiment of the application, a third fast-axis collimating mirror 132 and a third slow-axis beam expander 133 are sequentially provided between the blue light source component 131 and the sixth reflector 134.
[0042] In this embodiment of the application, a fast-axis beam reducer 16 is provided between the fifth reflecting mirror 153 and the focusing lens 7.
[0043] In this embodiment, the first slow-axis beam expander 113 includes a first lens 115 and a second lens 116. The projections of the first lens 115, the second mirror 124, and the second lens 116 onto a plane perpendicular to the second direction F2 are arranged sequentially. The first slow-axis beam expander 113 is a laser beam expander. Laser beam expanders are designed to amplify a parallel input beam into a larger diameter parallel output beam. Laser beam expanders are used in applications such as laser scanning, interferometry, or telemetry. Current laser beam expanders employ afocal system design developed from well-established optical telescopes. In such systems, light rays from objects at infinity enter and exit the optical axis of the internal optics in a parallel manner. This means the entire system lacks a focal length. Traditionally, optical telescopes are primarily used to observe distant targets, such as celestial bodies in the universe. Optical telescopes can be mainly divided into two categories: refracting telescopes and reflecting telescopes. Refracting telescopes utilize lenses to refract or bend light, while reflecting telescopes utilize mirrors to reflect light. The most common beam expander originated from the Galilean telescope and typically includes an input negative lens and an output positive lens. The input mirror transmits a virtual focal beam to the output mirror; the two lenses are a virtual confocal structure.
[0044] In this embodiment, the second slow-axis beam expander 123 includes a third lens and a fourth lens, and the projections of the third lens, the first reflector 114, and the fourth lens onto the plane perpendicular to the second direction F2 are arranged in sequence.
[0045] In this embodiment, the third slow-axis beam expander 133 includes a fifth lens and a sixth lens.
[0046] In this embodiment, the green light source component 111 and the red light source component 121 are packaged in a TO package. TO (Transistor Outline) refers to the transistor's outline. Early transistors mostly used coaxial packaging, which was later adopted in optical communication and called TO packaging, i.e., coaxial packaging. By adding a heat dissipation ring, its heat dissipation capacity is improved, ensuring good power stability when the blue light TO is working.
[0047] Currently, commonly used RGB semiconductor lasers are in TO (Transparent Tolerancing) package form. This packaging form has advantages such as high reliability and long lifespan. However, because the TO package size is larger than the COS (Cosmic Optical System) package size, the conventional module size is relatively large. Furthermore, due to the inconsistency between the fast and slow axis beam quality of existing laser chips, optical components such as FAC (Fiber Optic Amplifier) and SAC (Small Optical Amplifier) are typically used for beam shaping before spatial beam combining. However, TO-packaged laser units usually use circular lenses to collimate the light emitted from the chip, which results in insufficient final beam brightness. This application improves module space utilization through a through-beam layout. Based on the TO chip collimated by a circular lens, a slow-axis beam expander is used to expand the slow axis beam. This enables a high-brightness white light source module.
[0048] Compared to related technologies, the white semiconductor laser includes multiple green light source components, which emit green light beams in a first direction. These green light source components are spaced apart along a second direction, perpendicular to the first direction. It also includes multiple red light source components, which emit red light beams in the first direction. The laser emission directions of the green light source components are opposite to those of the red light source components. These red light source components are spaced apart along the second direction, and the green and red light source components are alternately arranged. Furthermore, it includes multiple first reflectors, which are spaced apart along the second direction and correspond one-to-one with each of the green light source components. The first reflectors are sequentially arranged with their corresponding green light source components in the first direction, reflecting the green light beams emitted by the green light source components to the second direction. Finally, it includes multiple second reflectors, which are spaced apart along the second direction and correspond one-to-one with each of the red light source components. The second reflectors are sequentially arranged with their corresponding red light source components in the first direction, reflecting the red light beams emitted by the green light source components to the second direction. A red light beam emitted by a component is reflected to a second direction; a third reflector, which is arranged at intervals with multiple first reflectors along the second direction, is used to reflect the green light beam reflected by the multiple first reflectors to the first direction; a fourth reflector, which is arranged at intervals with multiple second reflectors along the second direction, is used to reflect the red light beam reflected by the multiple second reflectors to the first direction; a fifth reflector, which is arranged sequentially with the fourth, third, and fifth reflectors in the first direction, is used to reflect the green light beam reflected by the third reflector and the red light beam reflected by the fourth reflector to the second direction; a blue light module, which is used to emit a blue light beam in the second direction; a focusing lens and an output fiber, the focusing lens being used to focus the blue light beam emitted by the blue light module, the red light beam reflected by the fifth reflector, and the green light beam onto the output fiber; the green light source component, the second reflector, the first reflector, and the red light source component are arranged sequentially on a plane perpendicular to the second direction and each has an opening; a first edge sealing strip and a second edge sealing strip respectively seal the openings on both sides of the plate. This application adopts an alternating arrangement of green and red light source components, which can improve the space utilization of the semiconductor laser and reduce its size.
[0049] The foregoing has provided a detailed description of a white semiconductor laser provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A white semiconductor laser, characterized in that, The white semiconductor laser includes: Multiple green light source components are provided, wherein the green light source components are used to emit green light beams in a first direction, and the multiple green light source components are arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction; Multiple red light source components are provided, wherein the red light source components are used to emit red light beams in a first direction, the laser emission direction of the green light source components is opposite to that of the red light source components, the multiple red light source components are arranged at intervals along a second direction, and the multiple green light source components and the multiple red light source components are arranged alternately. Multiple first reflectors are arranged at intervals along a second direction. Each of the multiple first reflectors corresponds to a multiple green light source component. The first reflectors and their corresponding green light source components are arranged sequentially in a first direction. The first reflectors are used to reflect the green light beam emitted by the green light source component to the second direction. Multiple second reflectors are arranged at intervals along a second direction. Each of the multiple second reflectors corresponds to one of the multiple red light source components. The second reflectors and their corresponding red light source components are arranged sequentially in a first direction. The second reflectors are used to reflect the red light beam emitted by the red light source components to the second direction. A third reflecting mirror is arranged at intervals along a second direction with a plurality of first reflecting mirrors, and the third reflecting mirror is used to reflect the green light beam reflected by the plurality of first reflecting mirrors to the first direction; A fourth reflecting mirror is arranged at intervals along a second direction with a plurality of second reflecting mirrors, and the fourth reflecting mirror is used to reflect the red light beam reflected by the plurality of second reflecting mirrors to a first direction; The fifth reflector, the fourth reflector, the third reflector and the fifth reflector are arranged in sequence in the first direction, and the fifth reflector is used to reflect the green light beam reflected by the third reflector and the red light beam reflected by the fourth reflector to the second direction; A blue light module, the blue light module being used to emit a blue light beam in a second direction; A focusing lens and an output optical fiber, wherein the focusing lens is used to focus the blue light beam emitted by the blue light module, the red light beam reflected by the fifth reflecting mirror, and the green light beam onto the output optical fiber; The green light source component, the second reflector, the first reflector, and the red light source component are arranged sequentially on a plane perpendicular to the second direction.
2. The white semiconductor laser according to claim 1, characterized in that, The green light source component and the red light source component are packaged in a TO package.
3. The white semiconductor laser according to claim 1, characterized in that, The white light semiconductor laser includes a plurality of first fast-axis collimating lenses, which are arranged at intervals in the second direction. A plurality of green light source components correspond one-to-one with the plurality of first fast-axis collimating lenses. The green light source components, the first fast-axis collimating lenses, and the first reflector are arranged sequentially in the first direction.
4. The white semiconductor laser according to claim 3, characterized in that, The white light semiconductor laser includes a plurality of first slow-axis beam expanders, which are spaced apart in the second direction. A plurality of green light source components correspond one-to-one with the plurality of first slow-axis beam expanders. The green light source components, the first fast-axis collimating lens, the first slow-axis beam expander, and the first reflector are arranged sequentially in the first direction.
5. The white semiconductor laser according to claim 4, characterized in that, The white light semiconductor laser includes a plurality of second fast-axis collimating mirrors, which are spaced apart in the second direction. A plurality of red light source components correspond one-to-one with the plurality of second fast-axis collimating mirrors. The red light source components, the second fast-axis collimating mirrors, and the second reflector are arranged sequentially in the first direction.
6. The white semiconductor laser according to claim 5, characterized in that, The white light semiconductor laser includes a plurality of second slow-axis beam expanders, which are spaced apart in the second direction. A plurality of red light source components correspond one-to-one with the plurality of second slow-axis beam expanders. The red light source components, the second fast-axis collimating lens, the second slow-axis beam expander, and the second reflector are arranged sequentially in the first direction.
7. The white semiconductor laser according to claim 6, characterized in that, The blue light module includes multiple blue light source components and multiple corresponding sixth reflectors. The blue light source components and the sixth reflectors are spaced apart in the first direction. The multiple sixth reflectors, the fifth reflector, the focusing lens, and the output optical fiber are spaced apart along the second direction. The projections of the green light source component, the second reflector, the first reflector, the red light source component, and the focusing lens on a plane perpendicular to the second direction are arranged sequentially.
8. The white semiconductor laser according to claim 7, characterized in that, A third fast-axis collimating lens and a third slow-axis beam expander are sequentially arranged between the blue light source assembly and the sixth reflector.
9. The white semiconductor laser according to claim 8, characterized in that, A fast-axis beam reducer is provided between the fifth reflecting mirror and the focusing lens.
10. The white semiconductor laser according to claim 9, characterized in that, The first slow-axis beam expander includes a first lens and a second lens, and the projections of the first lens, the second mirror, and the second lens onto a plane perpendicular to the second direction are arranged in sequence.