5 Gbps Optical Wireless Communication Using Commercial SPAD Array Receivers

Shenjie Huang*, Cheng Chen, Rui Bian, Harald Haas, Majid Safari

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Photon counting detectors such as single-photon avalanche diode (SPAD) arrays can be utilized to improve the sensitivity of optical wireless communication (OWC) systems. However, the achievable data rate of SPAD-based OWC systems is strongly limited by the nonlinearity induced by SPAD dead time. In this work, the performance of SPAD-based OWC system with orthogonal frequency division multiplexing (OFDM) is investigated and compared with that of on-off keying (OOK). We employ nonlinear equalization, peak-to-average power ratio optimization by adjusting the OFDM clipping level, and adaptive bit and energy loading to achieve a record experimental data rate of 5 Gbps. The contrasting optimal regimes of operation of the two modulation schemes are also demonstrated.
Original languageEnglish
Pages (from-to)2294-2297
JournalOptics Letters
Issue number9
Publication statusPublished - 24 Apr 2022


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