Is blue optical filter necessary in high speed phosphor-based white light LED visible light communications?

Jiun Yu Sung, Chi Wai Chow*, Chien Hung Yeh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

Optical blue filter is usually regarded as a critical optical component for high speed phosphor-based white light emitting diode (LED) visible-light- communication (VLC). However, the optical blue filter plays different roles in VLC when using modulations of on-off keying (OOK) or discrete multi-tone (DMT). We show that in the DMT VLC system, the blue optical filter may be unnecessary, and even degrade the transmission performance (by reducing the optical signal-to-noise ratio (SNR)). Analyses and verifications by experiments are performed. To the best of our knowledge, this is the first time the function of blue filters in VLC is explicitly analyzed.

Original languageEnglish
Pages (from-to)20646-20651
Number of pages6
JournalOptics Express
Volume22
Issue number17
DOIs
StatePublished - 25 Aug 2014

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