# RFID over Low Cost VCSEL-based MMF Links: Experimental Demonstration and Distortion Study

Carlos Vieira, Luis, Gomes, Nathan J., Batchelor, John C., Nkansah, Anthony, Assimakopoulos, Philippos, Ziai, Mohamed A. (2019) RFID over Low Cost VCSEL-based MMF Links: Experimental Demonstration and Distortion Study. IET Optoelectronics, 14 (4). pp. 149-154. ISSN 1751-8768. E-ISSN 1751-8776. (doi:10.1049/iet-opt.2018.5138) (KAR id:76858)

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## Abstract

Radio-over-Fibre (RoF) Distributed Antenna System (DAS) technology has been investigated for the distribution of ultra-high frequency (UHF) radio frequency identification (RFID) signals. RoF DAS allows for reduced number of readers and centralized placement of readers which facilitates easy system maintenance, but it is important to find a low-cost solution that can achieve comparable performance to a conventional RFID system. In this work, a lowcost vertical cavity surface-emitting laser (VCSEL)-based multimode fibre (MMF) link has been developed and demonstrated for passive UHF RFID applications. The reported results show almost the same performance when compared with a conventional RFID system. In addition, simple spatial antenna diversity schemes are tested, with improved performance reported in comparison with a RFID-RoF system without diversity. Also, an investigation of RFID over fibre with RoF nonlinearity is carried out showing that PR-ASK RFID modulation allows for higher levels of RF carrier and modulated signal power than the ASK RFID, for low levels of nonlinearity.

Item Type: Article 10.1049/iet-opt.2018.5138 T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts Nathan Gomes 27 Sep 2019 13:25 UTC 16 Feb 2021 14:07 UTC https://kar.kent.ac.uk/id/eprint/76858 (The current URI for this page, for reference purposes) https://orcid.org/0000-0003-3763-3699 https://orcid.org/0000-0002-5139-5765 https://orcid.org/0000-0002-2550-1317
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