Full-duplex high-speed indoor optical wireless communication system based on a micro-LED and VCSEL array | Zendy

Zixian Wei | Zendy; Shi Zhang | Zendy; Simei Mao | Zendy; Lei Wang | Zendy; Li Zhang | Zendy; Chien-Ju Chen | Zendy; MengChyi Wu | Zendy; Yuhan Dong | Zendy; Lai Wang | Zendy; Yi Luo | Zendy; H. Y. Fu | Zendy

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Full-duplex high-speed indoor optical wireless communication system based on a micro-LED and VCSEL array

Author(s) -

Zixian Wei,

Shi Zhang,

Simei Mao,

Lei Wang,

Li Zhang,

Chien-Ju Chen,

MengChyi Wu,

Yuhan Dong,

Lai Wang,

Yi Luo,

H. Y. Fu

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.412348

Subject(s) - telecommunications link , computer science , bit error rate , optical wireless , vertical cavity surface emitting laser , transmitter , electronic engineering , optical wireless communications , visible light communication , non line of sight propagation , free space optical communication , gigabit , wireless , optical communication , optics , computer network , physics , telecommunications , decoding methods , engineering , laser , light emitting diode , channel (broadcasting)

We built a full-duplex high-speed optical wireless communication (OWC) system based on high-bandwidth micro-size devices, for which micro-LED and VCSEL arrays are implemented to establish downlink and uplink, respectively. The high-capacity downlink based on a single-pixel quantum dot (QD) micro-LED can reach a data rate of 2.74 Gbps with adaptive orthogonal frequency division multiplexing (OFDM). VCSEL-based line-of-sight (LOS) and non-line-of-sight (NLOS) uplinks are designed with lens-free receiving functions for a 2.2-m communication distance. Experimental results have been demonstrated and confirmed that both downlink and uplinks are capable of providing sufficient bandwidth for a multi-gigabit OWC. Besides, the lens-free uplink receiver can alleviate requirements for aligning and improve the mobility of the transmitter. The VCSELs implemented for both systems work with low driving currents of 140-mA and 190-mA under consideration of the human eye safety. For non-return-to-zero on-off keying (NRZ-OOK), both uplinks can achieve 2.125 Gbps with bit-error-rate (BER) lower than the forward error correction (FEC) threshold of 3.8×10 -3 for Ethernet access.

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