4-Gbit/s visible light communication link based on 16-QAM OFDM transmission over remote phosphor-film converted white light by using blue laser diode

Abstract

Visible Light Communication (VLC) as a new technology for ultrahigh-speed communication is still limited when using slow modulation light-emitting diode (LED). Alternatively, we present a 4-Gbit/s VLC system using coherent blue-laser diode (LD) via 16-quadrature amplitude modulation orthogonal frequency division multiplexing. By changing the composition and the optical-configuration of a remote phosphor-film the generated white light is tuned from cool day to neutral, and the bit error rate is optimized from 1.9 × 10(-2) to 2.8 × 10(-5) in a blue filter-free link due to enhanced blue light transmission in forward direction. Briefly, blue-LD is an alternative to LED for generating white light and boosting the data rate of VLC.

32 Gigabit-per-second Visible Light Communication Link with InGaN/GaN MQW Micro-photodetector

“…Various modulation techniques have been investigated in VLC links, such as on-off keying (OOK) and orthogonal frequency-division multiplexing (OFDM) [10, [33][34][35][36][37][38]. OFDM has attracted attentions due to its robustness against inter-symbol interference (ISI) and frequency selective fading.…”

“…It is known to be able to increase data rate of the communication link [36]. By dividing a broad fading channel into multiple narrow subchannels, flatness can be assumed on each subchannel and at the receiver, and a simple one-tap equalization can be performed to efficiently eliminate channel effects and enhance communication capabilities of the device [34][35][36][37][38]. This property makes OFDM highly advantageous when being used in band-limited systems as compared to other FDM techniques.…”

Thermal Analysis of Blue Laser Diode for Solid State Lighting Application

“…It doesn't concern only lighting domain, but also data storage or communication, when coupling of laser and phosphor is used [9] [10]. To avoid the diode degradation caused by heat and to assure long-life, the cooling module is required.…”

An Optimal LED Light Source Arrangement to Reduce SNR Fluctuation for MISO VLC System Using Fireworks Algorithm

“…Visible light communication (VLC), with obvious characters of high transmission rate and free spectrum for wireless services especially in indoor environments, has been proposed as a promising wireless communication technology in the recent years [1][2][3][4][5]. In indoor VLC systems, LED lamps are usually located in the center or evenly separated with the style of matrix arrays in the ceiling of the room.…”