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

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


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 practical 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.

Original languageEnglish (US)
Pages (from-to)17971-17981
Number of pages11
JournalOptics Express
Issue number15
StatePublished - Jul 24 2017

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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