High-speed visible light communication based on a III-nitride series-biased micro-LED array

Xie, Enyuan and He, Xiangyu and Islim, Mohamed Sufyan and Purwita, Ardimas and McKendry, Jonathan J. D. and Gu, Erdan and Haas, Harald and Dawson, Martin D. (2019) High-speed visible light communication based on a III-nitride series-biased micro-LED array. Journal of Lightwave Technology, 37 (4). pp. 1180-1186. ISSN 0733-8724 (https://doi.org/10.1109/JLT.2018.2889380)

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Abstract

Visible light communication (VLC) using III-nitride light-emitting diodes (LEDs) offers many advantages such as license-free operation, high spatial diversity and innate security. In particular, micro-LEDs (μLEDs) are strong candidates for VLC due to their high modulation bandwidths. However, the low optical power of a single μLED is a key factor limiting VLC performance. In this paper, we report an optimized series-biased μLED array to achieve higher optical power while retaining high modulation bandwidth for high-speed VLC. An example array consisting of 3 × 3 40 μm-in-diameter μLED elements is presented here. At a current density of 3200 A/cm 2 in direct-current operation, the optical power and small signal 6-dB electrical modulation bandwidth of a blue-emitting series-biased μLED array are over 18.0 mW and 285 MHz, respectively. The data transmission capabilities of this μLED array are demonstrated by using on-off keying, pulse-amplitude modulation, and orthogonal frequency division multiplexing modulation formats over free space with the error-free data transmission rates of 1.95, 2.37, and 4.81 Gb/s, respectively.

  • Item type:Article
    ID code:66904
    Dates:
    Date
    Event
    15 February 2019
    Published
    24 December 2018
    Published Online
    26 August 2018
    Accepted
    Notes:© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics > Institute of Photonics
    Faculty of Science > Physics
    Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:12 Feb 2019 11:58
    Last modified:25 Apr 2024 00:59
    URI:https://strathprints.strath.ac.uk/id/eprint/66904
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