Semiconductor laser spectral beam combining device and method based on collimating-deflecting element

Abstract

The invention belongs to the technical field of semiconductor laser, and discloses a semiconductor laser spectrum beam combining device and method based on a collimation-deflection element. The devicecomprises a semiconductor laser array (1), and a fast axis collimating mirror (2), a light beam rotating element (3), a collimation-deflection element (4), a diffraction grating (5) and an output coupling mirror (6) which are sequentially arranged along a light path, wherein the collimation-deflection element (4) is used for refracting light beams emitted by different emission units and enablingthe light beams to enter the same area of the diffraction grating (5), and the diffraction grating (5) is used for diffracting a plurality of light beams overlapped in the same area at the same diffraction angle, so that the light beams become the same light beam and are outputted. Thus, by improving the composition of each component in the beam combining device, the arrangement mode and the internal structure of each component and the like, the problems of feedback of light beams emitted by an off-center emission unit, low beam combining efficiency and the like in the traditional semiconductor laser array spectrum beam combining mode can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor lasers, and more specifically relates to a semiconductor laser spectral beam combining device and method based on a collimation-deflection element, and is a novel semiconductor laser array spectral beam combining system and beam combining method. Background technique [0002] With the rapid development of the field of laser science, one of the important issues is to achieve high-power, high-brightness laser output. [0003] Semiconductor lasers are widely used in communication, biology, medical treatment and material processing due to their advantages such as wide range of wavelength selection, small size, high electro-optic energy conversion rate and long working life. But its shortcomings are also obvious: low power of a single light-emitting unit, poor beam quality in the slow axis direction leads to low beam energy density, etc. These shortcomings hinder the direct use of semiconductor l...

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Problems solved by technology

[0006] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a semiconductor laser spectral beam combining device and method based on collimation-deflection elements, wherein through the composition of each component in the semiconductor laser spectral beam combining device and Their settings, internal structure, etc. are improved, and the overall processing process of the corresponding beam combining method is controlled. Compared with the existing technology, it can effectively solve the problems such as off-center emission in the traditional semiconductor laser array spectral beam combining method. The light beams emitted by the units are fed back and the efficiency of beam combining is low. On the premise of maintaining the good beam quality of the output beams, the present invention allows more beams emitted by emitting units to participate in spectral beam combining, and significantly improves the efficiency of the semiconductor laser line array. The feedback and beam combining efficiency of the off-center emitting unit in the middle, thereby improving the overall output power and brightness of the semiconductor laser array; and, the new semiconductor laser array spectral beam combining device and method can reduce the beam outside the main optical axis Off-axis aberration, thereby improving the efficiency of spectral beam combining, and making the light field mode of each emitting unit more stable

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