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Filter-less WDM for visible light communications using colored pulse amplitude modulation

Lookup NU author(s): Dr Paul HaighORCiD



This is the authors' accepted manuscript of an article that has been published in its final definitive form by OSA - The Optical Society, 2019.

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© 2019 Optical Society of AmericaThis Letter demonstrates, for the first time, to the best of our knowledge, a new wavelength-division multiplexing (WDM) scheme for visible light communications using multi-level colored pulse amplitude modulation. Unlike traditional WDM, no optical bandpass filters are required, and only a single optical detector is used. We show that, by transmitting n independent sets of weighted on–off keying non-return-to-zero data on separate wavelengths over a line-of-sight transmission path, the resultant additive symbols can be successfully demodulated. Hence, the data rates can be aggregated for a single user or divided into individual colors for multiple user access schemes. The system is empirically tested for M = 4 and 8 using an off-the-shelf red, green, and blue (RGB) chip light-emitting diode (LED). We demonstrate that for M = 4, using the R and B chips, a bit error rate (BER) of ≤ 10−6 can be achieved for each wavelength at bit rates up to 10 Mbps, limited by the LEDs under test. For M = 8 using R, G, and B, a BER of ≤ 10−6 can be achieved for each wavelength at bit rates up to 5 Mbps.

Publication metadata

Author(s): Burton A, Haigh PA, Chvojka P, Ghassemlooy Z, Zvanovec S

Publication type: Article

Publication status: Published

Journal: Optics Letters

Year: 2019

Volume: 44

Issue: 19

Pages: 4849-4852

Online publication date: 01/10/2019

Acceptance date: 02/04/2019

Date deposited: 22/05/2020

ISSN (print): 0146-9592

ISSN (electronic): 1539-4794

Publisher: OSA - The Optical Society


DOI: 10.1364/OL.44.004849

PubMed id: 31568458


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Funder referenceFunder name
H2020 MSC ITN 764461
GACR 17-17538S