A GaN Micro-LED Based Underwater Wireless Optical Communication Subjected to Sea Salt, Maalox and Chlorophyll

An underwater wireless optical communication (UWOC) system based on a $40 \ \mu \mathrm{m}$ GaN micro-LED was proposed and successfully demonstrated. The system's performances under sea salt, Maalox and Chlorophyll added water were studied. The measurements in bit error rates (BERs) and eye diagrams show that the performances of UWOC systems degrade significantly with increasing concentrations of added substances in water. Maximum transmission data rates up to 933 Mbps, 790 Mbps, 800 Mbps and 910 Mbps were detected in the systems under conditions of tap water, 0.5% sea salt, 1 ml Maalox and 0.25 ml chlorophyll in 414 L tap water, respectively.