High-speed integrated micro-LED array for visible light communication

Abstract

In this Letter, we report high-speed integrated 14 µm in diameter micro-light-emitting diode (μLED) arrays with the parallel configuration, including 2 × 2 , 2 × 3 , 2 × 4 , and 2 × 5 arrays. The small junction area of μLED ( ∼ 191 µ m 2 ) in each element facilitates the operation of higher injection current density up to 13 k A / c m 2 , leading to the highest modulation bandwidth of 615 MHz. The optical power of 2 × 5 array monotonically increases ( ∼ 10 times higher) as the number of arrays increases (1 to 10), while retaining the fast modulation bandwidth. A clear eye diagram up to 1 Gbps without any equalizer further shows the capability of this high-speed transmitter for VLC. These results mean that tailoring the optical power of μLEDs in a parallel-biased integrated array can further enhance the data transmission rate without degradation of the modulation bandwidth.

Li-Pos: A Light Positioning Framework Leveraging OFDM for Visible Light Communication

“…Moreover, the DC optical (DCO)-OFDM is made unipolar by adding the DC bias [ 1 ], which is given by ( 1 ): where is the original vector signal, is the added DC bias (which varies with the QAM constellation), and N is the noise component that is added to the DC signal. The DC bias value is not fixed for all constellations.…”

“…Light is a vital resource that plays multifaceted roles, including illumination and energy. In recent years, much research has been performed on visible light communication (VLC) technology, which has received increasing investment and has been used in a growing number of applications in the communications industry [ 1 , 2 ]. As most current visible indoor communication systems suffer from prolonged time delays, low position accuracy, and high power consumption, VLC is an appealing solution for bringing wireless communication to regions where radio frequency (RF) communications are rarely used, such as hospitals, oil or chemical plants, and aircraft [ 3 , 4 , 5 ].…”

Analysis and Investigation of Dual-Polarized Color LED Based Visible Light Communication System

“…Furthermore, the visible wavelength spectrum is more than 10,000 times the existing wireless spectrum for future signal access applications [1]. Hence, the light-emitting diode (LED) based visible light communication (VLC) system has been presented and demonstrated to provide an alternative choice for wide capacity wireless access [2,3]. The LED-based VLC transmission could also provide beneficial benefits, such as costeffectiveness, a large unlicensed spectrum, energy efficiency, a long lifetime, no electromagnetic interference (EMI), high modulation bandwidth, and signal security [4][5][6].…”

Received-Signal-Strength (RSS) Based 3D Visible-Light-Positioning (VLP) System Using Kernel Ridge Regression Machine Learning Algorithm With Sigmoid Function Data Preprocessing Method

“…However, these RF based systems could suffer from interferences generated by other RF wireless devices and may not be applicable in RF restricted areas. Visible light communication (VLC) is considered as a promising wireless technology for the future wireless and mobile networks [3][4][5][6][7][8][9]. It is license-free and electromagnetic interference (EMI) free.…”