Abstract
Coherent vortex beams have shown great potential in many applications including information transmission under non-ideal conditions, as information can be encoded in the orbital angular momentum. However, inhomogeneity of atmosphere tends to scramble the vortex structure and give rise to speckle. It is therefore of great interest to reconstruct the topological charge of a vortex beam after it propagates through a scattering medium. Here, we propose a feasible solution for this. The proposed method measures holographically the scattered field and reconstructs the spiral phase from it by taking advantage of both the deterministic nature and the ergodicity of the scattering process. Our preliminary experiments show promising results and suggest that the proposed method can have great potential in information transmission under non-ideal conditions.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Greg Gbur and Robert K. Tyson
J. Opt. Soc. Am. A 25(1) 225-230 (2008)
Allarakha Shikder and Naveen K. Nishchal
Appl. Opt. 62(10) D58-D67 (2023)
Yue Chen, Zhao-Xiang Fang, Yu-Xuan Ren, Lei Gong, and Rong-De Lu
Appl. Opt. 54(27) 8030-8035 (2015)