Photonics, Vol. 10, Pages 383: Study on Temperature and Water Turbulence Impact on Saline Water-Based Wireless Optical Communication

Photonics, Vol. 10, Pages 383: Study on Temperature and Water Turbulence Impact on Saline Water-Based Wireless Optical Communication

Photonics doi: 10.3390/photonics10040383

Authors: Shofuro Afifah Amirullah Wijayanto Ya-Ling Liu Shien-Kuei Liaw Pei-Jun Lee Chien-Hung Yeh Ochi Hiroshi

Underwater wireless optical communication (UWOC) is a promising solution for Gb/s rate and long-distance underwater communication. However, random changes in the local temperature and salinity of seawater have caused different refractive indices of ocean water. This study investigated the UWOC system in different saline water while simultaneously changing the temperature and water flow. A maximum bit error rate (BER) of 4.851 × 10−6 was measured at −7.41 dBm in 3 m of 45.56 g/L saline water. By changing the temperature to 30 °C, the bit error rate (BER) value reached 5.12 × 10−6 in the saline water. On the other hand, water flow was generated in various types of water salinity to compare simultaneous environmental effects in the UWOC system. In 45.56 g/L of saline water with water flow, the UWOC system was still capable of reaching a BER value of 4 × 10−4.