Multi-color semiconductor laser beam combining device

Abstract

The invention discloses a multi-color semiconductor laser beam combining device, comprising a plurality of semiconductor lasers with different wavelengths connected in parallel; a plurality of beam polarization improvement devices connected in parallel, the beam polarization improvement devices are respectively located in the corresponding The output optical path of the semiconductor laser; a beam combining mirror group for beam combining, the input end of the beam combining mirror group is located on the output optical path of the beam polarization improvement device, and the output end of the beam combining mirror group is connected to a The compensation lens group is on the same optical path. The invention provides a multi-color semiconductor laser beam combining device, which can effectively control the increase of the noise of the multi-color semiconductor laser beam combining and ensure the polarization performance of the combined beam, and has the advantages of low cost, easy assembly and adjustment, and high performance. stability, etc.

Description

technical field [0001] The invention relates to the field of semiconductor lasers, in particular to a multicolor semiconductor laser beam combining device. Background technique [0002] Because semiconductor lasers have the advantages of high efficiency, small size, and long life, modules that combine beams of semiconductor lasers are widely used in laser medical treatment, laser detection and measurement, and instrumentation. At present, there are mainly three methods for beam combining of semiconductor lasers: 1) combining two or more laser beams through a beam combining device in free space; 2) combining two or more laser beams through a waveguide device; 3) Combining two or more laser beams through optical fiber fusion. [0003] Combining two or more laser beams through a beam combining device in free space is the most common method, with a relatively simple process and low cost; however, for applications with high noise requirements, there is no implementation advantag...

AI Technical Summary

Problems solved by technology

[0003] Combining two or more laser beams through a beam combining device in free space is the most common method, with a relatively simple process and low cost; however, for applications with high noise requirements, there is no implementation advantage, and after beam combining The interference of each channel cannot be effectively reduced, and it is not convenient to add monitoring or feedback components to it

[0004] Combining two or more laser beams through a waveguide device is also widely used. The structure is simple, but the process requirements are high. Compared with free space, there is no cost advantage for combining beams through a beam combining device, and each channel The interference is serious, and a special process is required to ensure the polarization characteristics of the output beam

No cost advantage in applications sensitive to noise parameters and high polarization maintaining performance

[0005] Combining two or more laser beams through optical fiber fusion is currently used in many fields, but each time most of the fusion is two optical fibers. If it is a combination of multiple beams, the operation is complicated and cannot be guaranteed to be high. yield

Similar to the above two methods, there is no cost advantage in applications sensitive to noise parameters and high polarization maintaining performance

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