Underwater optical communication

Abstract

Although a field as underwater optical communications can encompass different technological fields, in this bachelor thesis we will focus on underwater wireless communications, which, although underwater optical communications is dominated using cable, we can find multiple advantages, such as high transmission speed and wide transmission spectrum with minimal optical signal latency. The main objective of this work is to develop a program to compute the attenuation of the optical beam between two user-specified points. For this purpose, a MATLAB program has been developed, in which, first, the seabed profile is processed. Then, with the help of datasets, we will calculate the mean annual temperature at the water surface, as well as the surface chlorophyll. Once we have these values, we calculate the depth temperature profile and the depth profile of chlorophyll concentration. Then, we will be able to calculate the specific attenuation at a point with a given longitude, latitude, depth, and wavelength, and finally we will be able to compute the optical beam attenuation between two user-specified points.