34.5 m Underwater optical wireless communication with 2.70 Gbps data rate based on a green laser with NRZ OOK modulation
This study proposed and experimentally demonstrated a high speed long distance underwater optical wireless communication (UOWC) system using a 520 nm green laser diode (LD) with non return to zero on off keying (NRZ OOK) modulation scheme. The UOWC link offers maximum data rates up to 4.60 Gbps, 3.93 Gbps, 3.48 Gbps and 2.70 Gbps over the underwater distances of 2.3 m, 11.5 m, 20.7 m and 34.5 m with the bit error rates below the forward error correction (FEC) criterion of 3.8 kh 10 3. To the best of our knowledge, UOWC data rate of 2.70 Gbps at 34.5 m is the highest at present.