Open AccessNon-line-of-sight optical information transmission through turbid water
Author(s) -
Zilan Pan,
Yin Xiao,
Lina Zhou,
Yonggui Cao,
Mingwei Yang,
Wen Chen
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.440002
Subject(s) - optics , transmission (telecommunications) , non line of sight propagation , free space optical communication , detector , robustness (evolution) , computer science , physics , optical communication , telecommunications , biochemistry , chemistry , wireless , gene
In this paper, a new and robust method is proposed to realize high-fidelity non-line-of-sight (NLOS) optical information transmission through turbid water around a corner. A series of 2D random amplitude-only patterns are generated by using the zero-frequency modulation method, which are used as optical information carriers. The laser beam modulated by random amplitude-only patterns propagates through turbid water, and the wave diffused by turbid water is further reflected around a corner. A single-pixel detector is used to collect light intensity at the receiving end. To demonstrate feasibility and effectiveness of the proposed NLOS free-space optical information transmission system, many optical experiments are conducted. The proposed method is fully verified by using different turbid water conditions, different separation distances around a corner and different detection angles of the single-pixel detector. Optical experimental results demonstrate that the proposed method is able to achieve high fidelity and high robustness for free-space optical information transmission through turbid water. Even when there is an obstacle behind turbid water, high-fidelity free-space optical information transmission is still realized by using the proposed method. In addition, the proposed method possesses a wide detection range at the receiving end, which is of great significance in practical applications. The proposed method is a promising application for NLOS free-space optical information transmission.