Experimental Demonstration of an 8-Gbit/s QPSK Coherent Underwater Wireless Optical Communication Link Under Scattering Conditions

We experimentally demonstrate an 8-Gbit/s QPSK coherent underwater wireless optical communication link under scattering conditions at 532 nm. We achieve BER below 20% FEC limit under attenuation length up to 6.5, and the corresponding receiver sensitivity is -29.8 dBm.