外文题目: Adaptive conversion of input beam with unsymmetrical intensity distribution to flattop beam based on dual SLMs
作者: Haotong Ma; Guowen Zhang; Zongliang Xie; Bo Qi; Ge Ren; Sanhong Wang
刊名: Proc.SPIE
年: 2016 卷: 9989 文章编号：99890S (6 pp.)
会议名称: Technologies for Optical Countermeasures XIII
英文摘要:
We propose and demonstrate the adaptive conversion of input beam with unsymmetrical intensity distribution into a near-diffraction-limited flattop beam with desired parameters in the near field based on a combination of dual phase-only liquid crystal spatial light modulators (LC-SLMs) and the stochastic parallel gradient descent (SPGD) algorithm. One phase-only LC-SLM redistributes the intensity of the input beam to the desired distributions at the other phase-only LCSLM plane, and the other phase-only LC-SLM compensates the wavefront of the output beam. The SPGD algorithm adaptively optimizes the phase distributions of dual phase-only LC-SLMs to reduce the variance between the actual beam shape and the target beam shape. The experimental results on a prefabricated unsymmetrical input beam show that the technique is capable of adaptively creating near-diffraction-limited flattop beams with desired parameters.


文献类型: 会议论文
正文语种: English
DOI: 10.1117/12.2242023


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