Edinburgh Research Explorer

High-Speed Visible Light Communication Based on a III-Nitride Series-Biased Micro-LED Array

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Open Access permissions

Open

Documents

  • Download as Adobe PDF

    Accepted author manuscript, 716 KB, PDF document

https://ieeexplore.ieee.org/document/8586886
Original languageEnglish
JournalJournal of Lightwave Technology
DOIs
Publication statusPublished - 24 Dec 2018

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 ( u LEDs) are strong candidates for VLC due to their high modulation bandwidths. However, the low optical power of a single u LED is a key factor limiting VLC performance. In this paper, we report an optimized series-biased u LED array to achieve higher optical power while retaining high modulation bandwidth for high-speed VLC. An example array consisting of 3 × 3 40 u m-in-diameter u LED 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 u LED array are over 18.0 mW and 285 MHz, respectively. The data transmission capabilities of this u LED 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.

ID: 146473141