High Bandwidth GaN-Based Micro-LEDs for Multi-Gb/s Visible Light Communications

  • R. X. G. Ferreira
  • , E. Xie
  • , J. J. D. McKendry
  • , Sujan Rajbhandari
  • , H. Chun
  • , G. Faulkner
  • , S. Watson
  • , A. E. Kelly
  • , E. Gu
  • , R. V. Penty
  • , I. H. White
  • , D. C. O’Brien
  • , M. D. Dawson

Research output: Contribution to journalArticlepeer-review

Abstract

Gallium-nitride (GaN)-based light-emitting diodes (LEDs) are highly efficient sources for general purpose illumination. Visible light communications (VLC) uses these sources to supplement existing wireless communications by offering a large, licence-free region of optical spectrum. Here, we report on progress in the development of micro-scale GaN LEDs (micro-LEDs), optimized for VLC. These blue-emitting micro-LEDs are shown to have very high electrical-to-optical modulation bandwidths, exceeding 800 MHz. The data transmission capabilities of the micro-LEDs are illustrated by demonstrations using ON-OFF-keying, pulse-amplitude modulation, and orthogonal frequency division multiplexing modulation schemes to transmit data over free space at the rates of 1.7, 3.4, and 5 Gb/s, respectively.
Original languageEnglish
Pages (from-to)2023-2026
Number of pages4
JournalIEEE Photonics Technology Letters
Volume28
Issue number19
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Keywords

  • Light emitting diodes
  • Bandwidth
  • Modulation
  • Current density
  • OFDM
  • Data communication
  • Bit error rate
  • pulse amplitude modulation
  • amplitude shift keying
  • free-space optical communication
  • gallium compounds
  • III-V semiconductors
  • integrated optoelectronics
  • light emitting diodes
  • OFDM modulation
  • optical communication equipment
  • PAM
  • micro light-emitting diodes
  • GaN
  • optical communication
  • visible-light communication

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