A light beam shaping apparatus

Abstract

The present invention provides a light beam shaping device comprising a light source and a first lens array, a second lens array, a light beam shaper, a light beam focusing device and a first optical fiber which are sequentially remote from the light source and disposed on an outgoing light path of the light source; the light source comprises a plurality of semiconductor lasers arranged in arrays; the first lens array comprises a plurality of first lenses arranged in arrays; the first lenses are aligned with the semiconductor lasers in a one-to-one corresponding mode; the second lens comprises a plurality of second lenses arranged in arrays; the second lenses are corresponding to the first lenses in a one-to-one mode; the light source is located in a front focal plane of the first lens array; and a back focal plane of the first lens array coincides with the front focal plane of the second lens array. The first lens array collimates the light of the light source in the direction of the fast axis, and the second lens array collimates the light of the light source in the slow axis direction. By collimating the light of the light source in the slow axis direction, loss on sides surfaces due to divergence in the slow axis direction is reduced, thereby raising the shaping efficiency.

Description

Technical field [0001] The invention relates to the technical field of semiconductor lasers, in particular to a beam shaping device. Background technique [0002] Semiconductor lasers are widely used in the first optical fiber communication, photoelectric integration, optical disk storage, pump light source, atmospheric environment detection, trace toxic gas analysis, molecular spectroscopy, etc. due to their small size, light weight, low voltage and high power. Many fields closely related to human life. However, due to its special working principle, the beam quality of semiconductor lasers differs greatly in the two directions perpendicular and parallel to the PN junction. Usually, the direction perpendicular to the PN junction is called the fast axis direction, and the direction parallel to the PN junction. This is called the slow axis direction. The beam divergence angle in the fast axis direction is large, and the beam divergence angle in the slow axis direction is small. ...

AI Technical Summary

Problems solved by technology

If only the ordinary microlens array beam shaping system is used, the collimated spot diameter will be smaller, the divergence angle will be larger, and the working distance will be shorter, the beam will not be fully utilized, and more light energy will be lost during transmission. Poor beam quality

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