Numerical simulation of blue-green light transmission with non-constant scattering coefficient of underwater optical communication

In underwater blue-green optical communication, blue-green light is attenuated by seawater absorption, scattering, and ocean turbulence, and the scattering coefficients of blue-green light are different for different depths of seawater; that is, the transmission attenuation of blue-green light varies in different depths of seawater. We calculated the scattering coefficients and albedo of seawater at different depths and analyzed the received optical power of the detector and bit error rate when the blue-green light was line-of-sight (LOS) transmitted in different ways (horizontal, vertical, and oblique range) with the same distance in the same seawater depth range under the effect of absorption and scattering of seawater. Numerical results show that under the effect of absorption and scattering of seawater, the transmission attenuation of blue-green light is large in seawater with large albedo. Therefore, blue-green light in different depths of seawater in the same way LOS transmission of the same distance, the power of light required in the albedo of large seawater is large.