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Rong Li

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Proceedings Article | 30 April 2024 Paper

Design of semiconductor laser beam zooming and shaping system based on aspheric lens group

Rong Li, Haijing Zheng, Huichao Guo, Yingchun Li, Huaili Zhang, Laixian Zhang

Proceedings Volume 13156, 131560T (2024) https://doi.org/10.1117/12.3016482

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This paper presents a zooming and shaping system for a semiconductor laser beam based on aspheric lens group. Firstly, a theoretical model for transforming Gaussian beam into flat-top beam is established from Gaussian beam model and flattop beam model. Secondly, using the model and the derived mapping function formula, the shaping system is automatically optimized with optical design software to realize the conversion from Gaussian beam to flat-top beam. Finally, a zooming optical path with aspheric lens group is designed by optical design software to achieve laser beam zooming and shaping, and a surface type equation with machinability is obtained. Research results: The designed optical system forms a relatively uniform spot in far field, such as 500m, and the divergence angle can achieve continuous change of 8-32mrad. The research results have certain reference value and guiding significance for the shaping and homogenization design of semiconductor laser beam.

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