A 400-Gb/s OWC System through the Free-Space Link with a Water-Air-Water Interface

A 400-Gb/s OWC system through a 200-m free-space link with either 8.8-m piped water-air-piped water or 6.5-m turbid water-air-turbid water interface is constructed. This demonstrated OWC system outperforms the existing OWC systems through the free-space link with an air-water-air interface.