Generation of helical beams with pre-determined energy distribution based on phase modulation gratings

被引：13
|
作者：
Qi Xiao-Qing [1 ]
Gao Chun-Qing [1 ]
Liu Yi-Dong [2 ]
机构：
[1] Beijing Inst Technol, Sch Opt Elect, Beijing 100081, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China
来源：
ACTA PHYSICA SINICA | 2010年 / 59卷 / 01期
基金：
中国国家自然科学基金;
关键词：
orbital angular momentum; helical beams; Gerchberg-Saxton algorithm; computer-generated hologram; ORBITAL ANGULAR-MOMENTUM; LIGHT; DENSITY; STATES;
D O I：
10.7498/aps.59.264
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The generation of helical beams with different pre-determined orbital angular momentum states based on computer-generated holograms is studied. The phase-type diffraction gratings are designed by using the Gerchberg-Saxton iterative method, and realized by using the spatial light modulator (SLM). In the experiments diffraction fields with different helical beams distribution are obtained by using the gratings. The theoretical simulation agrees with the experimental results. This method is meaningful for the information transmission based on the orbital angular momentum.
引用
收藏
页码：264 / 270
页数：7
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