Abstract—The Industrial Revolution 4.0 era has triggered the interest towards Underwater Optical Wireless Communication (UOWC) as enabling technology for underwater applications. However, UOWC is affected by issues in the underwater optical channel, such as absorption, scattering, and turbulence. Previous studies primarily focused on absorption and scattering, with the impact of underwater optical turbulence often being overlooked. This turbulence can cause significant signal intensity fluctuations at the receiver, leading to poor UOWC system performance. Recent research tends to oversimplify turbulence by assuming it remains constant even though factors like water temperature and salinity affect turbulence variation. Therefore, this study aims to explore how salinity affects UOWC through practical experiments. The experimental set-up is developed consisting of a transmitter, receiver, and a glass chamber to emulate the water channel. The green and blue light sources are used to generate optical signal propagation in saline water channel. The interaction between the selected light with the saline water is analyzed by varying the level of salt concentration. Prior to that, the geometrical loss for Light-Emitting Diode (LED) and laser light sources is determined. Then, the attenuation constant, c is estimated and finally the comparison between the calculated and measured power is made. The analysis reveals that the received light intensity decreases. The estimated c increases as the salt concentration in the water increases indicating the performance of UOWC is declining as the salinity of the water increases. This finding provides insight for designing optimal underwater communication devices and consequently maximizing the UOWC channel capability.