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

被引：46
|
作者：
Ma, Haotong [1 ]
Zhou, Pu [1 ]
Wang, Xiaolin [1 ]
Ma, Yanxing [1 ]
Xi, Fengjie [1 ]
Xu, Xiaojun [1 ]
Liu, Zejin [1 ]
机构：
[1] Natl Univ Def Technol, Coll Photon Electron Sci & Engn, Changsha 410073, Hunan, Peoples R China
来源：
OPTICS EXPRESS | 2010年 / 18卷 / 08期
关键词：
DARK HOLLOW BEAMS; COHERENT; DESIGN; SYSTEM; AMPLITUDE; ELEMENTS;
D O I：
10.1364/OE.18.008251
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate the annular flattop beam shaping technique with dual phase only liquid crystal spatial light modulators (LC-SLM) based on the refractive laser beam shaping systems. One LC-SLM redistributes the intensity distribution, and the other restores the initial underlying wave front. Differing from the conventional annular beam shaping technique, the wave front of the output beam can be maintained. The influences of deviations of beam waist and beam shape on the output beam profile are discussed in detail. Experimental results show that approximate 71% of the power is enclosed in a region with less than 7% rms intensity variation. The 4.1mm diameter near-diffraction-limited beam retains an annular flattop intensity distribution without significant diffraction peaks for a working distance of more than 24cm in the near field. (C) 2010 Optical Society of America
引用
收藏
页码：8251 / 8260
页数：10
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