Real-Time Video Transmission for Underwater Wireless Optical Communications System

In this paper, it designed and experimentally demonstrate an underwater wireless optical communication system by using a multi-beam green laser diode. The system was capable of transmitting a data video with pulse width modulation (PWM). Two laser diode (532 nm) used to carry the data (video) and two photodiode utilities as a receiver. It used MgSO4 and Mg(OH)2 as a suspended particles. The main purpose of adding these compounds is to a simulation of the water in nature. Also to find the difference between the affect of adding each chemical compounds to clean water on the transmitting of data (video). The gain, loss, SNR and BER have calculated for each one. It is found that MgSO4 affect was greater than Mg(OH)2 on the received video signal.