Double-channel vector spatial light modulator for generation of arbitrary complex vector beams
Double-channel vector spatial light modulator for generation of arbitrary complex vector beams
复制标题
用于生成任意复矢量光束的双通道矢量空间光调制器
DOI：
10.1364/ol.39.000386
复制
发表时间：
2014-01-15
期刊：
影响因子：
3.6
通讯作者：
Wang, Shu-Zhen
中科院分区：
文献类型：
--
作者：
Guo, Cheng-Shan;Rong, Zhen-Yu;Wang, Shu-Zhen
本文提出了一种基于矢量空间光调制器（VSLM）的任意矢量光束的实现方法，该矢量空间光调制器（VSLM）由一个纯相位空间光调制器（SLM）和一个棋盘格结构的组合半波片组成。结合四相位编码算法，VSLM可以将线性极化高斯波束或平面波转换成具有任意空间极化和二维复杂振幅分布的矢量波束。结果表明，VSLM可以直接将纯相位值转换为两个正交偏振复值，具有较高的衍射效率。与现有的利用单轴激光激光器产生矢量光束的方法相比，该方法具有轴向共程、结构简单、只涉及零级衍射的特点。该结构也更容易集成和设计便携式设备，因为它避免使用光学元件，如特殊光栅、棱镜和反射器。(C) 2014年美国光学学会
We propose an approach for implementation of an arbitrary vector beam based on a vector spatial light modulator (VSLM), which is simply composed by a phase-only spatial light modulator (SLM) and a composed half-wave plate with checkerboard structure. In combination with a four-phase encoding algorithm, the VSLM can transform a linear polarized Gaussian beam or a plane wave into a vector beam with both arbitrary spatial polarization and complex amplitude distributions in two dimensions. It is demonstrated that the VSLM can directly transform pure phase values into two orthogonal polarized complex values with high-diffraction efficiency. Compared with the existing methods for generation of vector beams with SLMs, our approach is on-axis and common-path with simple structure and only involves the zero-order diffraction. The proposed structure is also easier to make an integration and design portable device since it abstains from using optical elements such as special gratings, prisms, and reflectors. (C) 2014 Optical Society of America