Semiconductor laser
By adjusting the beam arrangement and wavelength order of the fiber coupling module in a semiconductor laser, and combining it with a conversion lens and an output grating for spectral beam combining, the problem of the limitation on the number of single laser tubes in the prior art is solved, and higher output power is achieved.
Patent Information
- Application Number
- CN202422961518.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The existing spectral beam combining technology is limited to the number of single semiconductor laser tubes, resulting in limited output power.
By arranging the beams output from the fiber optic coupling module from top to bottom, with the wavelengths increasing or decreasing sequentially from top to bottom, and then combining the spectra through a conversion lens and an output grating, the number of laser tubes can be increased.
This increases the output power of the semiconductor laser, allowing for the setup of more fiber-coupled modules and providing even higher output power.
Smart Images
Figure CN223471910U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of laser, especially relates to a semiconductor laser. BACKGROUND
[0002] The semiconductor laser has the advantages of high efficiency, compact structure, low cost and high reliability, is widely used in the fields of optical fiber communication, optical disc, laser printer, laser scanner, laser pointer (laser pen) and the like, and is the laser with the largest production quantity.
[0003] In the semiconductor laser, the spectral beam combination is carried out on a plurality of semiconductor laser single tubes, and the output power can be increased while the beam quality is almost unchanged. However, due to the limitation of the optical path, the number of semiconductor laser single tubes that can be combined by the existing spectral beam combination technology is limited when the spectral beam combination is carried out on the semiconductor laser single tubes in an array, and thus the output power of the semiconductor laser is limited. UTILITY MODEL CONTENT
[0004] In view of the above problems, the utility model discloses a semiconductor laser to overcome the above problems or at least partially solve the above problems.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] The utility model discloses a semiconductor laser, including conversion lens, output grating and a plurality of optical fiber coupling module,
[0007] Each optical fiber coupling module includes output optical fiber, coupling lens and a plurality of laser single tube, and the light beams output by the plurality of laser single tubes are coupled into the output optical fiber through the coupling lens;The light beams output by each optical fiber coupling module are arranged from top to bottom in turn, and the wavelength of the output light beam increases or decreases from top to bottom in turn, the conversion lens is arranged between the output grating and each optical fiber coupling module, and the conversion lens and the output grating are used for the spectral beam combination of the light beams output by each optical fiber coupling module.
[0008] Further, the optical fiber grating is arranged in each output optical fiber, and the wavelength feedback of the optical fiber grating in the optical fiber coupling module from top to bottom increases or decreases in turn.
[0009] Further, the output grating is a reflection grating.
[0010] Further, the output grating is a transmission grating.
[0011] Further, the output ends of each output optical fiber are arranged side by side and closely connected.
[0012] The utility model has the advantages of:
[0013] The semiconductor laser of the utility model, through the light beams outputted by each optical fiber coupling module are arranged from top to bottom in turn, and the wavelength of the output light beams is increased or decreased from top to bottom in turn, and finally the light beams outputted by each optical fiber coupling module are combined by a conversion lens and an output grating, so that the number of laser single tubes can be increased, and higher output power can be provided. BRIEF DESCRIPTION OF DRAWINGS
[0014] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in
[0015] Figure 1 Fig. 1 is a structural schematic diagram of a semiconductor laser according to an embodiment of the utility model;
[0016] Figure 2 Fig. 2 is a structural schematic diagram of an optical fiber coupling module according to an embodiment of the utility model.
[0017] Fig. 1 is a structural schematic diagram of a semiconductor laser according to an embodiment of the utility model; DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the following will combine the specific embodiments of the utility model and the corresponding drawings to make a clear and complete description of the technical scheme of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, but not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.
[0019] The following will combine the drawings to specifically describe the technical scheme provided by each embodiment of the utility model.
[0020] An embodiment of the utility model provides a semiconductor laser, as shown in the figure, the semiconductor laser includes a conversion lens 1, an output grating 2 and a plurality of optical fiber coupling modules 3. Figure 1 Specifically, as shown in the figure, the semiconductor laser includes a conversion lens 1, an output grating 2 and a plurality of optical fiber coupling modules 3.
[0021] Specifically, as shown in the figure, the semiconductor laser includes a conversion lens 1, an output grating 2 and a plurality of optical fiber coupling modules 3. Figure 2As shown, each fiber coupling module 3 includes an output fiber 4, a coupling lens 5, and a plurality of laser single tubes 6, and the light beams output by the plurality of laser single tubes 6 are coupled into the output fiber 4 through the coupling lens 5; the light beams output by each fiber coupling module 3 are arranged from top to bottom in turn, the wavelengths of the light beams output by each fiber coupling module 3 are all different, and the wavelengths of the output light beams increase or decrease from top to bottom in turn, so that the wavelengths output by each fiber coupling module 3 are locked, that is, the wavelengths of the output light beams of each laser single tube 6 in the same fiber coupling module 3 are the same and are locked, and then the locked light beams are coupled into the output fiber 4 through the coupling lens 5, and the conversion lens 1 is arranged between the output grating 2 and each fiber coupling module 3, and the conversion lens 1 and the output grating 2 are used for spectrally combining the light beams output by each fiber coupling module 3.
[0022] In this way, the wavelengths of the laser single tubes 6 in each fiber coupling module 3 are first locked, and the light beams of the plurality of laser single tubes 6 are coupled into the output fiber 4, and then the light beams output by the plurality of output fibers 4 are spectrally combined, so that the optical path restriction only acts on the fiber coupling modules 3, that is, the equal optical path condition limits the number of the fiber coupling modules 3 arranged for spectral combination, and the number of the laser single tubes 6 in one fiber coupling module 3 is not limited by the equal optical path condition.
[0023] In the embodiment, the number of the laser single tubes 6 in the fiber coupling module 3 can be increased to improve the output power of the semiconductor laser. Of course, the number of the fiber coupling modules 3 can also be increased to improve the output power, that is, the more the number of the fiber coupling modules 3 arranged, the higher the output power of the semiconductor laser.
[0024] In summary, in the semiconductor laser of the embodiment, the light beams output by each fiber coupling module are arranged from top to bottom in turn, and the wavelengths of the output light beams increase or decrease from top to bottom in turn, and then the light beams output by each fiber coupling module are spectrally combined through the conversion lens and the output grating, so that the number of the laser single tubes arranged can be increased, and higher output power can be provided.
[0025] In the embodiment, as shown in Figure 2 Each output fiber 4 is provided with a fiber grating 7, and the wavelengths of the fiber gratings 7 in the fiber coupling modules 3 from top to bottom increase or decrease in turn. Specifically, the periods of the fiber gratings 7 in different fiber coupling modules 3 are slightly different, so that the fiber gratings 7 feedback specified wavelengths, thereby locking the laser single tubes 6 at specified wavelengths, and further locking different fiber coupling modules 3 at slightly different wavelengths.
[0026] And, as shown in Figure 1As shown, the output grating 2 is a reflection grating. Of course, in other embodiments, the output grating can also be a transmission grating, which is also within the protection scope of the present application.
[0027] In addition, as shown, Figure 1 As shown, the output ends of the output fibers 4 are arranged side by side and closely connected. In this way, more numbers of fiber coupling modules 3 can be arranged in the semiconductor laser, and the output power of the semiconductor laser can be further improved.
[0028] The above is only a specific embodiment of the present application, and based on the above teaching, other improvements or modifications can be made by those skilled in the art. It should be understood by those skilled in the art that the above specific description is only for better explanation of the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A semiconductor laser, characterized by, The conversion lens, the output grating and a plurality of fiber coupling modules are included. Each of the fiber coupling modules includes an output fiber, a coupling lens and a plurality of laser single tubes, and the light beams output by the plurality of laser single tubes are coupled into the output fiber through the coupling lens; the light beams output by each of the fiber coupling modules are arranged from top to bottom in sequence, and the wavelengths of the output light beams increase or decrease from top to bottom in sequence; the conversion lens is arranged between the output grating and each of the fiber coupling modules, and the conversion lens and the output grating are used for performing spectral beam combination on the light beams output by each of the fiber coupling modules.
2. The semiconductor laser of claim 1, wherein, Each of the output fibers is provided with a fiber grating, and the wavelengths of the fiber gratings in the fiber coupling modules from top to bottom increase or decrease in sequence.
3. The semiconductor laser of claim 2, wherein, The output grating is a reflection grating.
4. The semiconductor laser according to claim 2, wherein The output grating is a transmission grating.
5. The semiconductor laser according to any one of claims 1 to 4, characterized in that, The output ends of the output fibers are arranged side by side and closely connected.