Multitube fiber-optic coupling method of symmetrical semiconductor laser

A technology of semiconductors and lasers, applied in the coupling of optical waveguides, instruments, optics, etc., can solve the problems of small number of integrations and low space utilization, and achieve the effects of simplified design, increased number of integrations, and high laser brightness

CN101661138AInactive Publication Date: 2010-03-03SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-03-03
Estimated Expiration
Not applicable · inactive patent

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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.
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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 ...

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Embodiment Construction

[0015] The beam integration method of the present invention is as image 3 As shown, the optical path is divided into two symmetrical parts. First, a cylindrical lens is used to compress the fast-axis divergence angle of each semiconductor laser 4 so that the fast-axis divergence angle is less than or equal to 1 degree. Then each semiconductor laser 4 is fixed on the laser seat 6, the laser seat 6 is divided into two parts with symmetrical left and right positions, and they are relatively insulated, so that each semiconductor laser can be connected in series to supply power. Each semiconductor laser 4 corresponds to a 45-degree reflector 2 . The light emitted by each semiconductor laser 4 in the left part is reflected on the same concave reflector 3 through the 45-degree reflector 2, and each 45-degree reflector and its corresponding concave reflector are adjusted so that the light spots are gathered on a plated At the same point before the top of the prism 8 of the all-refl...