Multitube fiber-optic coupling method of symmetrical semiconductor laser

Abstract

The invention provides a multitube fiber-optic coupling method of a symmetrical semiconductor laser. In the method, the quick axes divergence angle of the semiconductor laser is compressed by a columnlens to be less than or equal to 1 degree, and all semiconductor lasers are divided into two parts in bilateral symmetry to form a symmetrical light path; each semiconductor laser of each part reflects light emitted by the semiconductor lasers to the same concave surface reflecting mirror through respective corresponding 45-degree reflecting mirror; light beams reflected by the concave surface reflecting mirrors are gathered at one point through a prism plated with a total reflection film, so that light on the left part and the right part of the symmetrical light path is gathered at one pointin the same mode; and finally the light beams are reshaped by an optical system and output by fiber-optic coupling. The concave surface reflecting mirrors are arranged on the left side and the rightside of the symmetrical semiconductor laser both, the integrating quantity is improved by over 40 percent and the volume is reduced by 40 percent; and compared with an integration method of single concave surface reflecting mirror, the integrating quantity of the semiconductor lasers is improved by one time.

Description

technical field [0001] The invention relates to a multi-tube optical fiber coupling mode of a semiconductor laser, which adopts a design method for eliminating optical spherical aberration through a bidirectional optical path, and belongs to the technical field of light beam integration of multiple semiconductor lasers. Background technique [0002] Due to its advantages of high electro-optic conversion efficiency, long life, small size, and low price, semiconductor lasers are developing very rapidly and their application fields are becoming more and more extensive. Limited by the P-N junction growth process of semiconductor lasers and the heat dissipation conditions of the laser active region, it is difficult to achieve high power output of semiconductor lasers with a single laser tube. Although multiple semiconductor lasers can be made into a laser bar, limited by the output divergence angle of the lasers, it is technically difficult and costly to couple the light emitted ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low number of integrations or low space utilization in current multi-tube beams, the present invention provides a multi-tube optical fiber coupling method for symmetrical semiconductor lasers that can integrate more semiconductor lasers and has a small overall size after integration. The bidirectional optical path design method makes it easier to eliminate spherical aberration, and the laser brightness of the fiber-coupled port is higher

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