A High Duty Ratio Beam Combining System Based on Birefringent Crystals

Abstract

The invention relates to a high-duty cycle beam-combination system based on a birefringent crystal. The high-duty cycle beam-combination system comprises a polarization rotating system, a collimator arrangement system and a high-duty cycle synthetic system. Firstly, the polarization control on incident beams is realized by utilizing the polarization rotating system, subsequently, reasonable spatial arrangement is performed on beams which need to be spliced by the collimator arrangement system, and finally, high-duty cycle aperture splicing is performed on the whole array by the high-duty cycle synthetic system. The high-duty cycle beam-combination system is suitable for large-size laser synthesis, the laser power density of each beam-combination device can be effectively reduced, the synthetic aperture of the whole coherent synthetic system is increased, and remote transmission of synthetic beams is facilitated. According to the high-duty cycle beam-combination system, high-duty cycle aperture filling of any beam and any arrangement structure array can be realized.

Description

technical field [0001] The invention relates to the field of beam combining, and is a beam combining system with high duty ratio based on birefringent crystals. Background technique [0002] At present, with the rapid development of semiconductor technology and the substantial improvement in the performance of semiconductor laser devices, single-link all-solid-state lasers have achieved remarkable development, and have derived such as round rod lasers, slab lasers, sheet lasers, fiber lasers, thermal Lasers with different structures such as container lasers. However, due to the limitations of the thermal effect of the laser medium itself, nonlinear effects, material properties, and the brightness of the pump source, the output power of a single-link all-solid-state laser has a limit. In order to overcome the bottleneck of single-link all-solid-state laser power improvement, researchers at home and abroad have proposed beam synthesis technology, which has become a research h...

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Problems solved by technology

However, the microlens array itself has its limitations, mainly in: (1) the manufacture and processing of the microlens array is relatively complicated and expensive; (2) because the sub-aperture size of the microlens array is on the order of microns, when When the system output power continues to increase, the entire microlens array needs to withstand a large power density, which is not conducive to the use in high-power coherent combining systems

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