Abstract

A phase-diffractive optical element is designed to measure the topological charge of optical vortices. We use the scalar diffraction theory to calculate the far-field diffraction patterns. The simulation results show that almost all of the power of the incident beams is diffracted to the same diffraction order, and this approach is also effective for multi-ring optical vortices. We upload this phase-diffractive optical element on the liquid crystal spatial light modulator to do the experiment. The observed far-field diffraction patterns fit well with the simulation results.

© 2016 Chinese Laser Press

Perfect optical vortex array with controllable diffraction order and topological charge

Shiyao Fu, Tonglu Wang, and Chunqing Gao
J. Opt. Soc. Am. A 33(9) 1836-1842 (2016)

Topological charge dependent propagation of optical vortices under quadratic phase transformation

Pravin Vaity and R. P. Singh
Opt. Lett. 37(8) 1301-1303 (2012)

Detecting the topological charge of optical vortex beams using a sectorial screen

Ruishan Chen, Xiaoqiang Zhang, Yong Zhou, Hai Ming, Anting Wang, and Qiwen Zhan
Appl. Opt. 56(16) 4868-4872 (2017)

Optical phased array radiating optical vortex with manipulated topological charges

Xiaoliang Ma, Mingbo Pu, Xiong Li, Cheng Huang, Wenbo Pan, Bo Zhao, Jianhua Cui, and Xiangang Luo
Opt. Express 23(4) 4873-4879 (2015)

Measuring the topological charge of ultrabroadband, optical-vortex beams with a triangular aperture

Matthew E. Anderson, Heath Bigman, Luís E. E. de Araujo, and Jan L. Chaloupka
J. Opt. Soc. Am. B 29(8) 1968-1976 (2012)