Unleashing ultraviolet brings visible improvement

KAUST Discovery - Unleashing ultraviolet brings visible improvement

​​"High-speed communication systems based on ultraviolet radiation are now in sight."

"Military and civil authorities could benefit from secure optical communication systems that use light to carry messages between moving vehicles. Researchers at KAUST have now demonstrated rapid data transfer using ultraviolet-B (UV-B) light, which provides many advantages over visible light."

"Optical communications systems using visible lasers and light emitting diodes (LEDs) suffer from interference due to the high levels of visible light in sunlight. What’s more, the transmitter and receiver must be aligned very precisely, which is very difficult for vehicles on the move."

"This is where UV-B becomes useful. UV-B from the sun is mostly absorbed by ozone in the upper atmosphere, so it doesn’t interfere with communications. Also, UV-B gets scattered in different directions by aerosols and common molecules, meaning the signal spreads out from the source to cover a wide area and accurate alignment of the beam is not required."

71-Mbit/s ultraviolet-B LED communication link based on 8-QAM-OFDM modulation

Xiaobin Sun, Zhenyu Zhang, Anas Chaaban, Tien Khee Ng, Chao Shen, Rui Chen, Jianchang Yan, Haiding Sun, Xiaohang Li, Junxi Wang, Jinmin Li, Mohamed-Slim Alouini, and Boon S. Ooi
Optics Express, 25(19), 23267-23274 (2017)

DOI: 10.1364/OE.25.023267

HDL: 10754/625770