Visible light communication using InGaN optical sources with AlInGaP nanomembrane down-converters

J. M. M. Santos, Sujan Rajbhandari, D. Tsonev, H. Chun, B. Guilhabert, A. B. Krysa, A. E. Kelly, H. Haas, D. C. O’Brien, N. Laurand, M. D. Dawson

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    We report free space visible light communication using InGaN sources, namely micro-LEDs and a laser diode, down-converted by a red-emitting AlInGaP multi-quantum-well nanomembrane. In the case of micro-LEDs, the AlInGaP nanomembrane is capillary-bonded between the sapphire window of a micro-LED array and a hemispherical sapphire lens to provide an integrated optical source. The sapphire lens improves the extraction efficiency of the color-converted light. For the case of the down-converted laser diode, one side of the nanomembrane is bonded to a sapphire lens and the other side optionally onto a dielectric mirror; this nanomembrane-lens structure is remotely excited by the laser diode. Data transmission up to 870 Mb/s using pulse amplitude modulation (PAM) with fractionally spaced decision feedback equalizer is demonstrated for the micro-LED-integrated nanomembrane. A data rate of 1.2 Gb/s is achieved using orthogonal frequency division multiplexing (ODFM) with the laser diode pumped sample.
    Original languageEnglish
    Pages (from-to)10020-10029
    JournalOptics Express
    Issue number9
    Publication statusPublished - 28 Apr 2016

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