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

被引：20

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

页码：2973 / 2975

页数：3

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