Abstract

Uniform laser beams with controllable patterns are crucial for various applications, including laser processing and inertial confinement fusion. While some methods have been proposed to generate flattop beams, they often require complex optical systems that can become ineffective because of the misalignment of the system or the imperfection of optical elements. To overcome these issues, we utilized feedback-based wavefront shaping (FWS) technology to generate flattop beams with desired patterns from a disordered light. To solve the multi-goal optimization problem, we propose some modifications based on the Non-dominated Sorting Genetic Algorithm II (NSGA2) and successfully generate focal beams with a uniform intensity distribution and controllable beam shape from the disordered light field.

© 2023 Optica Publishing Group

Multi-objective optimization genetic algorithm for multi-point light focusing in wavefront shaping

Qi Feng, Fan Yang, Xinyu Xu, Bin Zhang, Yingchun Ding, and Qiang Liu
Opt. Express 27(25) 36459-36473 (2019)

Improvement of Galilean refractive beam shaping system for accurately generating near-diffraction-limited flattop beam with arbitrary beam size

Haotong Ma, Zejin Liu, Pengzhi Jiang, Xiaojun Xu, and Shaojun Du
Opt. Express 19(14) 13105-13117 (2011)

Near-diffraction-limited annular flattop beam shaping with dual phase only liquid crystal spatial light modulators

Haotong Ma, Pu Zhou, Xiaolin Wang, Yanxing Ma, Fengjie Xi, Xiaojun Xu, and Zejin Liu
Opt. Express 18(8) 8251-8260 (2010)

Focus shaping and optical manipulation using highly focused second-order full Poincaré beam

Yuxiong Xue, Yusong Wang, Sichao Zhou, Hongwei Chen, Guanghao Rui, Bing Gu, and Qiwen Zhan
J. Opt. Soc. Am. A 35(6) 953-958 (2018)

Design and performance of a refractive optical system that converts a Gaussian to a flattop beam

John A. Hoffnagle and C. Michael Jefferson
Appl. Opt. 39(30) 5488-5499 (2000)