Near-diffraction-limited flattop laser beam adaptively generated by stochastic parallel gradient descent algorithm

被引：19
|
作者：
Ma, Haotong [1 ]
Liu, Zejin [1 ]
Xu, Xiaojun [1 ]
Wang, Sanhong [1 ]
Liu, Changhai [1 ]
机构：
[1] Natl Univ Def Technol, Coll Photon Electron Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
OPTICS LETTERS | 2010年 / 35卷 / 17期
关键词：
LIQUID-CRYSTAL; PHASE; MODULATOR; DESIGN;
D O I：
10.1364/OL.35.002973
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate the adaptive generation of a near-diffraction-limited flattop laser beam in the near field based on the stochastic parallel gradient descent algorithm and dual-phase-only liquid crystal spatial light modulators (LC-SLMs). One LC-SLM redistributes the intensity, and the other compensates the wavefront of the output beam. The experimental results show that approximately 69% of the power is enclosed in a region with less than 6% rms intensity variation. The 5 mm diameter near-diffraction-limited output beam retains a flattop intensity distribution without significant diffraction peaks for a working distance of more than 30 cm. (C) 2010 Optical Society of America
引用
收藏
页码：2973 / 2975
页数：3
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