5 Gbps optical wireless communication using commercial SPAD array receivers

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

Research output: Contribution to journalArticlepeer-review


Photon counting detectors such as single-photon avalanche diode (SPAD) arrays can be used 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 the SPAD dead time. In this work, the performance of a 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-toaverage 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
Number of pages4
JournalOptics Letters
Issue number9
Early online date24 Apr 2022
Publication statusPublished - 1 May 2022


  • 5 Gbps
  • optical wireless communication (OWC)
  • commercial SPAD array receivers


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