Researchers Use Solar Cells to Achieve Fast Underwater Wireless Communication

https://www.optica.org/en-us/about/newsroom/news_releases/2022/february/researchers_use_solar_cells_to_achieve_fast_underw/

"3×3 solar array to create a detection area of 3.4 × 3.4 centimeters, in a 7-meter-long water tank that emulated an underwater channel. Mirrors were used to extend the pathlength of the optical signal, creating a transmission distance of 35 meters. The system showed reliable stability, low power consumption and high performance. As the size of the solar array increases from 1×1 to 3×3, the −20-dB bandwidth increases from 4.4 MHz to 24.2 MHz"