Underwater optical wireless communications (UOWC) have recently received considerable attention for both research and commercial use because of their facility to provide a much higher data rate than the traditional acoustic method within comparatively small distances. Many potential application of UWOC systems have been proposed for environmental monitoring, exploration, disaster precaution, and military operations. In all the above mentioned research works, high absorption and scattering of optical transmission in the water limits the benefits of UOWC systems to only few meters. In order to overcome these technical challenges, several new system design approaches proposed. This work is done in salt water. Salt water cannot be used for drinking because it causes dehydration. This paper analysis the performance of the system using different water samples like salt water, turbid water, normal water, etc.