Abstract

The smoothing scheme combining a diffraction-weakened lens array with the induced spatial incoherence method is proposed and demonstrated to be an efficient smoothing scheme for broadband laser systems. In our simulation, the RMS illumination nonuniformity of the target spot is reduced to 2% after sufficient smoothing time. The temporal characteristics and spatial power spectral density of the scheme are theoretically analyzed. When the incident light has intensity fluctuations, the uniformity of the target spot is stable, which means a robust smoothing scheme, and which predicts practical applications to the smoothing of broadband laser systems.

© 2019 Optical Society of America

Experiment and theory of beam smoothing using induced spatial incoherence with a lens array

Fujian Li, Yanqi Gao, Xiaohui Zhao, Lan Xia, Dong Liu, Lailin Ji, Wei Feng, Daxing Rao, Yong Cui, Haitao Shi, Jiani Liu, Weixin Ma, and Zhan Sui
Appl. Opt. 59(10) 2976-2982 (2020)

Two-dimensional performance of uniform irradiation with the use of an edge-softened lens array and spectral dispersion

Xiujuan Jiang, Shenlei Zhou, Zunqi Lin, and Jian Zhu
Appl. Opt. 46(16) 3164-3168 (2007)

Uniform irradiation of adjustable target spots in high-power laser driver

Xiujuan Jiang, Jinghui Li, Huagang Li, Yang Li, and Zunqi Lin
Appl. Opt. 50(27) 5213-5220 (2011)

Experimental demonstration of polarization smoothing in a convergent beam

Xiaoxia Huang, Huaiting Jia, Wei Zhou, Fan Zhang, Huaiwen Guo, and Xuewei Deng
Appl. Opt. 54(33) 9786-9790 (2015)

Beam smoothing characteristics of multi-central frequency and multi-color smoothing by spectral dispersion

Zhong Zhe-Qiang and Bin Zhang
Appl. Opt. 53(10) 2020-2025 (2014)