作者
Long Zhang, Danial Chitnis, Hyunchae Chun, Sujan Rajbhandari, Grahame Faulkner, Dominic O'Brien, Steve Collins
发表日期
2018/6/15
期刊
Journal of Lightwave Technology
卷号
36
期号
12
页码范围
2435-2442
出版商
IEEE
简介
Visible light communications is an alternative method of indoor wireless communications that requires sensitive receivers. Ideally, single photon avalanche detectors (SPADs) could be used to create more sensitive receivers. However, the dead time, finite output pulse width, and photon detection efficiency of existing SPAD arrays limit their sensitivity and bandwidth. In this paper, an accurate equation for the impact of dead time on the sensitivity of a SPAD array is presented. In addition, the impact of the width of the output pulses on the on–off keying data rate is investigated. Finally, a comparison between receivers containing an avalanche photo-diode (APD) and a large array of SPADs shows that although the receiver containing the SPAD is more sensitive in the dark, the APD-based receiver is more sensitive in a normal operating condition. However, the models that predict the performance of both receivers …
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L Zhang, D Chitnis, H Chun, S Rajbhandari, G Faulkner… - Journal of Lightwave Technology, 2018