Optical system for improving laser beam quality

Abstract

The invention discloses an optical system for improving beam quality of a semiconductor laser.According to the optical system, a semiconductor laser tube core is subjected to the processes that 1, the light-emitting area of the semiconductor laser tube core is amplified through an optical amplification element; 2, the light-emitting area is segmented, and each segment is subjected to optical conversion of 90-degree rotation through 90-degree optical rotating elements; 3, each segment is subjected to spatial translation through optical translation elements, so that the segments can be closer to one another, and gaps among the segments are reduced; 4, an image of the light-emitting area is subjected to proper linear shrinkage through an optical shrinkage element, and adapted linear sizes and divergence angles are output.By means of the optical system, the beam parameter product (BPP) of the beam output by the semiconductor laser is effectively reduced, beam quality is improved, and a powerful technological path is provided for manufacturing a high-power semiconductor pump laser and a high-power direct semiconductor laser system.

Description

technical field [0001] The invention relates to an optical system capable of improving the beam quality, in particular to an optical system for improving the beam quality of a semiconductor laser. Background technique [0002] With the application of semiconductor high-power laser technology in fiber laser pumping and direct semiconductor lasers, semiconductor lasers are required to output higher power and have better beam quality. In a high-power fiber laser system, the greater the power of the semiconductor pump laser, the fewer the number of branches of the fiber combiner required, and the simpler the system structure, it is easier to manufacture and maintain. In high-power direct semiconductor lasers, it is necessary to combine the beams of as many semiconductor lasers as possible, and at the same time require the beam quality to be as good as possible. But the current difficulty lies in that the slow axis (horizontal) direction is relatively wide in the light-emitting ...

AI Technical Summary

Problems solved by technology

Although the current semiconductor beam combining technology can combine the output beams of multiple semiconductor lasers into one, but due to the huge difference of BPP in the direction of the fast axis and the slow axis, the power value after multi-die beam combining is not easy to do. Large, with poor beam quality

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