Active tracking system for visible light communication using a GaN-based micro-LED and NRZ-OOK

Zhijian Lu, Pengfei Tian, Hong Chen, Izak Baranowski, Houqiang Fu, Xuanqi Huang, Jossue Montes, Youyou Fan, Hongyi Wang, Xiaoyan Liu, Ran Liu, Yuji Zhao
2017 Optics Express  
Visible light communication (VLC) holds the promise of a high-speed wireless network for indoor applications and competes with 5G radio frequency (RF) system. Although the breakthrough of gallium nitride (GaN) based micro-light-emitting-diodes (micro-LEDs) increases the -3dB modulation bandwidth exceptionally from tens of MHz to hundreds of MHz, the light collected onto a fast photo receiver drops dramatically, which determines the signal to noise ratio (SNR) of VLC. To fully implement the
more » ... ical high data-rate VLC link enabled by a GaN-based micro-LED, it requires focusing optics and a tracking system. In this paper, we demonstrate an active on-chip tracking system for VLC using a GaN-based micro-LED and none-return-to-zero on-off keying (NRZ-OOK). Using this novel technique, the field of view (FOV) was enlarged to 120 • and data rates up to 600 Mbps at a bit error rate (BER) of 2.1×10 −4 were achieved without manual focusing. This paper demonstrates the establishment of a VLC physical link that shows enhanced communication quality by orders of magnitude, making it optimized for practical communication applications.
doi:10.1364/oe.25.017971 pmid:28789285 fatcat:we3i7ghi6jfnrmjj3h66rnvtgq