Study on Light Source Techniques of Underwater Full-Duplex Optical Communication System

摘要

The traditional underwater laser communication system has less electro-optic conversion efficiency, short lifetime, large volume, low reliability and complex communication systems. Meanwhile, Underwater communication system with bandwidth above IMbps level is in urgent need. To solve these problems, a novel LED optical communication system is present which based on full-duplex mode. In order to improve the communication distance and reduce the influence of backscattering and reflection light, a novel method of blue light LED array placement is proposed. A practical optical attenuation estimation algorithm based on different chlorophyll concentration is used to evaluate the feasibility of 50m underwater communication link distance. The MATLAB numerical calculation are given. The simulation results show that the design method of LED array light source proposed in this paper has small size, light weight and simple structure, which can be applied to underwater optical communication in low channel attenuation, Mbps level bandwidth and long distance( >50m).