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Advanced LiFi technology: Laser light

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Original languageEnglish
DOIs
Publication statusPublished - 25 Feb 2020
EventPhotonics West: the optoelectronics, photonic materials and devices conference - San Francisco, California, United States
Duration: 1 Feb 20206 Apr 2020
https://spie.org/conferences-and-exhibitions/photonics-west

Conference

ConferencePhotonics West
Abbreviated titleSPIE OPTO
CountryUnited States
CitySan Francisco, California
Period1/02/206/04/20
Internet address

Abstract

We demonstrate high-speed LiFi data communication of over 20 Gbit/s using visible light from a laser-based white light emitting surface mount device (SMD) product platform that offers 10-100X the brightness of conventional LED sources. Equipped with high power blue laser diodes that offer over 3.5 GHz of 3 dB bandwidth, the laser-based white light SMD modules exhibited a signal-to-noise ratio (SNR) above 15 dB up to 1 GHz. The high SNR was combined with high order quadrature amplitude modulation (QAM) and orthogonal frequency division multiplexing (OFDM) to maximize the bandwidth efficiency. In this work, we present a laser based white light SMD module configured with a single 3W blue laser diode mounted on heat-sink, optically coupled to a collimating optic, achieving a LiFi data rate of up to 10 Gbit/s. Moreover, we demonstrate wavelength division multiplexing (WDM), from a white light SMD module configured with two blue laser diodes separated in peak wavelength to serve as separate communication channels. Using WDM, the dual laser SMD module enabled LiFi data rates of over 20 Gbit/s by simultaneously transmitting data over both channels.

    Research areas

  • Laser, LiFi, OFDM

Event

Photonics West: the optoelectronics, photonic materials and devices conference

1/02/206/04/20

San Francisco, California, United States

Event: Conference

ID: 142159152