Blue light communication for wireless air-underwater interconnection

Wireless light communication plays a critical role in establishing seamless communication networks across water, air, and vacuum transmission environments. Compared with other wavelengths, blue light can extend the reach of underwater communication links because of its low attenuation level in water. In this work, we report a blue light communication system that relies on a universal asynchronous receiver/transmitter scheme for wireless air-underwater connectivity. Transceiver modules packaged in a waterproof enclosure are used to establish communications in both water and air environments. Although optical paths are affected by multiple interface reflections, we demonstrate wireless air-underwater video communications with these systems, thus establishing a path to develop wireless communication network nodes across air and underwater environments.