Beam combining device for multicolor semiconductor laser devices

Abstract

The invention discloses a beam combining device for multicolor semiconductor laser devices. The beam combining device comprises a plurality of the semiconductor laser devices which are connected in parallel and have different wave lengths, a plurality of light beam polarization improvement devices which are connected in parallel and arranged on the output light paths of the corresponding semiconductor laser devices respectively, and a beam combining mirror set used for beam combination, wherein the input ends of the beam combining mirror set are arranged on the output light paths of the light beam polarization improvement devices, and the output ends of the beam combining mirror set and a compensating mirror set are arranged on the same light path. The beam combining device for the multicolor semiconductor laser devices can effectively control the increase amount of the noise of beam combination of the multicolor semiconductor laser devices and guarantee the polarization performance of the light beams after beam combination, and has the advantages of being low in cost, easy to assemble and adjust, and stable in performance.

Description

technical field [0001] The invention relates to the field of semiconductor lasers, in particular to a multicolor semiconductor laser beam combiner. 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 advantage, and a...

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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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