Abstract

The widespread deployment of LEDs for illumination purposes has open the door to the use of these devices for visible light communications (VLC). Most lighting fixtures are mounted with phosphor-based white LEDs, and a driver connected to the LED is also required for VLC. This paper shows that the parasitic effects introduced by this setup change the frequency response of the intrinsic LED. A linear model to characterize the whole setup is proposed, as well as a methodology to extract its parameters. This methodology allows the designer to characterize the frequency response of LEDs without the additional difficulty of knowing the specific parasitic components introduced by the setup. The proposed model offers an accurate estimation of the slope of the LED frequency response in order to broaden the frequency range in which the model is useful to characterize and simulate VLC links. This was corroborated with the characterization of three commercial white LEDs whose measured and modeled frequency responses matched perfectly.

Optimal spectra of the phosphor-coated white LEDs with excellent color rendering property and high luminous efficacy of radiation

Guoxing He and Huafeng Yan
Opt. Express 19(3) 2519-2529 (2011)

Impact of blue filtering on effective modulation bandwidth and wide-angle operation in white LED-based VLC systems

Noha Anous, Tarek Ramadan, Mohamed Abdallah, Khalid Qaraqe, and Diaa Khalil
OSA Continuum 1(3) 910-929 (2018)

Phosphor-converted LED modeling using near-field chromatic luminance data

Shu-Li Hsiao, Neng-Chung Hu, and Hugo Cornelissen
Opt. Express 21(S2) A250-A261 (2013)

High luminous flux from single crystal phosphor-converted laser-based white lighting system

Michael Cantore, Nathan Pfaff, Robert M. Farrell, James S. Speck, Shuji Nakamura, and Steven P. DenBaars
Opt. Express 24(2) A215-A221 (2016)

Real-time white-light phosphor-LED visible light communication (VLC) with compact size

Chien-Hung Yeh, Yen-Liang Liu, and Chi-Wai Chow
Opt. Express 21(22) 26192-26197 (2013)