High-speed underwater optical wireless communication using a blue GaN-based micro-LED

• Published in: Optics express Vol. 25; no. 2; p. 1193
• Main Authors: Tian, Pengfei, Liu, Xiaoyan, Yi, Suyu, Huang, Yuxin, Zhang, Shuailong, Zhou, Xiaolin, Hu, Laigui, Zheng, Lirong, Liu, Ran
• Format: Journal Article
• Language: English
• Published: United States 23.01.2017
• ISSN: 1094-4087; 1094-4087
• DOI: 10.1364/OE.25.001193

High-speed underwater optical wireless communication (UOWC) was achieved using an 80 μm blue-emitting GaN-based micro-LED. The micro-LED has a peak emission wavelength of ~440 nm and an underwater power attenuation of 1 dB/m in tap water. The -3 dB electrical-to-optical modulation bandwidth of the packaged micro-LED increases with increasing current and saturates at ~160 MHz. At an underwater distance of 0.6 m, 800 Mb/s data rate was achieved with a bit error rate (BER) of 1.3 × 10 , below the forward error correction (FEC) criteria. And we obtained 100 Mb/s data communication speed with a received light output power of -40 dBm and a BER of 1.9 × 10 , suggesting that UOWC with extended distance can be achieved. Through reflecting the light emission beam by mirrors within a water tank, we experimentally demonstrated a 200 Mb/s data rate with a BER of 3.0 × 10 at an underwater distance of 5.4 m.