An omnidirectional receiving system used in underwater wireless optical communication

The omnidirectional receiving system is suitable for underwater wireless optical communications (UWOCs), and it has less dependence on the structure of the underwater platform as it is connected by only one cable. The optical receiving module is a spherical structure, small size, and generates less heat. There is a square structure in the center of the spherical structure, and the spherical structure consists of six converging lenses in close contact with each other. And there is a photo-detector (PD, APD or PMT etc.) at the focus of each converging lens. Thus, with this structure, the underwater platform can realize the demand of omnidirectional reception without aligning at the sending end. By using high-sensitivity detectors in the receiving system, longer distance underwater communication and cross-media data transmission can be achieved.