Abstract
A method of underwater wireless communications using visible-light radiation is proposed for high-speed data transmission and recovery in deep-sea environment. Acoustic communication technology is effective and has been used for underwater data transmissions because the underwater propagation distance of acoustic wave is farther than in the air. But its data transmission rate is lower, and its propagation direction maybe are refracted and changed by the nonuniformity of acoustic-speed distribution when the temperature changes of seawater, causing the unstable communication. On the other hand, visible-light wave with wavelength of 380 nm-780 nm is an excellent medium for application in underwater wireless communications, which has received much attention. Its attractive features are very low energy decay rate in seawater, easily control the propagation direction and position range by the visibility, and potential high data rate and capacity. However, visible-light waves in the seawater have the spectral attenuation characteristics due to different marine environment. So in this paper, an automatic-control method of data transmission with wavelength-adaptation function is considered for different seawater turbidity.
