Multi-single-tube semiconductor laser dense wavelength beam combining device

Abstract

The invention discloses a multi-single-tube semiconductor laser dense wavelength beam combining device, and belongs to the technical field of lasers. The device comprises a multi-single-tube semiconductor laser space beam combining module, a Fourier transform lens, a diffraction grating and an external cavity mirror. A plurality of single-tube semiconductor lasers are linearly and oppositely arranged to emit initial laser beams; the laser beams are collimated by a fast-slow axis collimating mirror and reflected by a reflecting mirror to form a space beam-combined laser; Fourier transform is carried out on the laser beams through the Fourier transform lens, and the laser beams are diffracted and output through a diffraction grating element; and one part of diffracted light received by the outer cavity mirror is reflected and forms an outer cavity with the single-tube semiconductor laser with a front cavity surface plated with an antireflection film and reflectivity less than 1%, a wavelength is locked, and the other part of the diffracted light transmits the laser beam diffracted by the diffraction grating. The invention provides a multi-single-tube semiconductor laser dense wavelength beam combining device which solves problems of poor light beam quality, low brightness and the like caused by dense wavelength beam combination of semiconductor lasers with linear array type and stack type structures.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a multi-single-tube semiconductor laser dense wavelength beam combining device. Background technique [0002] The remarkable advantages of semiconductor lasers are compact structure, small size, long life and high electro-optic conversion efficiency of 50% or even higher. However, the current development level of lasers still limits people's in-depth application of lasers in various fields. Some applications in the field of material processing require high-power and high-beam-quality laser output at the same time, and when semiconductor lasers are used as pump sources, they also have strict requirements on brightness and wavelength, but traditional semiconductor laser technology cannot solve these problems. Combining beam combination technology can achieve high power, high beam quality, high brightness laser output. [0003] Among different types of semiconductor lasers, linear ...

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Problems solved by technology

[0005] In view of the above problems, the present invention provides a multi-single-tube semiconductor laser dense wavelength beam combining device to solve the problems of poor beam quality and low brightness caused by using linear array and stacked semiconductor lasers for dense wavelength beam combining

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