High-power semiconductor laser beam composite apparatus

Abstract

The invention relates to a multiple-beam composite device in a high-power semiconductor laser system. The device synthesizes light beams with four types of wavelengths sent out by eight groups of semiconductor laser arrays into a beam by adopting a space composite method. The invention belongs to the laser technical field. The device firstly carries out polarization coupling to eight beams of light with four types of wavelengths sent out by a first semiconductor laser array, a second semiconductor laser array, a third semiconductor laser array, a fourth semiconductor laser array, a fifth semiconductor laser array, a sixth semiconductor laser array, a seventh semiconductor laser array and a eight semiconductor laser array by utilizing a polarizing beam combiner to obtain four beams of natural light with four types of wavelengths; then the four beams of light are combined pairwise by utilizing a first wavelength beam combiner and a second wavelength beam combiner; and finally the two beams of beam combining light obtained are combined by a third wavelength beam combiner. The device has the advantages of more reasonable structure, less volume and lower cost.

Description

technical field [0001] The invention relates to a multi-beam recombination device in a high-power semiconductor laser system. The device adopts a spatial recombination method to combine beams of four wavelengths emitted by eight groups of semiconductor laser arrays into one beam. It belongs to the field of laser technology. Background technique [0002] As we all know, high-power semiconductor lasers are widely used in various fields due to their small size, high photoelectric conversion rate and long life. In particular, kilowatt-level high-power semiconductor lasers with high beam quality and high brightness can not only be directly applied to material processing, but also have wide application and great development prospects in pumping solid-state lasers and in military, medical and other fields. [0003] At present, in order to achieve high-power semiconductor laser output, most of them use relatively simple spatial compounding methods. For example, the German JENOP(S)T...

AI Technical Summary

Problems solved by technology

However, this method still has certain disadvantages. Because the method of wavelength combining and then polarization combining is used, the energy is concentrated in the last step of the polarization beam combiner, so the damage energy threshold requirements of the polarization beam combiner Relatively high, the corresponding increase in cost

Especially in practical systems, the last step of beam combining will directly damage the polarization beam combiner due to too high energy

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