CMOS-integrated GaN LED array for discrete power level stepping in visible light communications
Griffiths, Alexander D. and Islim, Mohamed Sufyan and Herrnsdorf, Johannes and McKendry, Jonathan J. D. and Henderson, Robert and Haas, Harald and Gu, Erdan and Dawson, Martin D. (2017) CMOS-integrated GaN LED array for discrete power level stepping in visible light communications. Optics Express, 25 (8). pp. 338-345. ISSN 1094-4087 (https://doi.org/10.1364/OE.25.00A338)
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Abstract
We report a CMOS integrated micro-LED array capable of generating discrete optical output power levels. A 16 x 16 array of individually addressable pixels are on-off controlled through parallel logic signals. With carefully selected groups of LEDs driven together, signals suitable for discrete transmission schemes are produced. The linearity of the device is assessed, and data transmission using pulse amplitude modulation (PAM) and orthogonal frequency division multiplexing (OFDM) is performed. Error-free transmission at a symbol rate of 100 MSamples/s is demonstrated with 4-PAM, yielding a data rate of 200 Mb/s. For 8-PAM, encoding is required to overcome the baseline wander from the receiver, reducing the data rate to 150 Mb/s. We also present an experimental proof-of-concept demonstration of discrete-level OFDM, achieving a spectral efficiency of 3.96 bits/s/Hz.
ORCID iDs
Griffiths, Alexander D. ORCID: https://orcid.org/0000-0002-1124-4751, Islim, Mohamed Sufyan, Herrnsdorf, Johannes ORCID: https://orcid.org/0000-0002-3856-5782, McKendry, Jonathan J. D. ORCID: https://orcid.org/0000-0002-6379-3955, Henderson, Robert, Haas, Harald, Gu, Erdan ORCID: https://orcid.org/0000-0002-7607-9902 and Dawson, Martin D. ORCID: https://orcid.org/0000-0002-6639-2989;-
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Item type: Article ID code: 60142 Dates: DateEvent16 March 2017Published9 March 2017AcceptedSubjects: Science > Physics > Optics. Light Department: Faculty of Science > Physics
Faculty of Engineering > Electronic and Electrical Engineering
Faculty of Science > Physics > Institute of Photonics
Technology and Innovation Centre > PhotonicsDepositing user: Pure Administrator Date deposited: 10 Mar 2017 15:00 Last modified: 12 Dec 2024 05:09 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/60142