Over 10 Gbps VLC for Long-Distance Applications Using a GaN-Based Series-Biased Micro-LED Array

Abstract

By employing a GaN-based series-biased microlight emitting diode (µLED) array and orthogonal frequency division multiplexing modulation format, a high-speed free-space visible light communication system for long-distance applications has been demonstrated. The blue series-biased µLED array, which consists of 3×3, 20 µm-diameter µLED elements, presents promising performance with an optical power and -6dB electrical modulation bandwidth of over 10 mW and 980 MHz, respectively. Record data transmission rates have been successfully achieved at different free-space distances. Within 5 m transmission distances, over 10 Gbps data rates at the forward error correction (FEC) floor of 3.8×10 −3 are accomplished. Extending the transmission distances to 20 m, the data rates are maintained at the Gbps level at the FEC floor.

4 Gbps wireless optical communications up to 5 m using a UV-C micro-light-emitting diode array

“…Furthermore, > 4 Gbps was maintained even at a distance of 5 m, indicating that this UV-C link can be extended to further distances. Based on our previous work using visible micro-LEDs, transmission distances of tens of meters may be possible, and work to investigate distances >5 m is ongoing [4].…”

White-Light GaN-μLEDs Employing Green/Red Perovskite Quantum Dots as Color Converters for Visible Light Communication

“…In 2010, the GaN-based µLED was first employed in VLC by Martin D. Dawson from the University of Strathclyde [16]. Since then, µLEDs have attracted extensive attention and achieved dramatic advances in the VLC field [17][18][19][20][21][22].…”

Experimental Evaluation of Indoor Optical Wireless MIMO Systems With Square and Linear Array Constellations

“…However, in indoor industrial environments, implementing high-speed OWC links with relatively simple optical LED-based system is desirable. Nonetheless, the light directivity and intensity of LEDs remain considerably inferior to the lasers, thereby making the realization of a high-speed transmission over a distance exceeding 10 m very challenging [8]. On the other hand, the use of another spatial multiplexing method which is the multiple-input-multiple-output (MIMO) approach, based on using multiple transmitters and receivers, has been shown to enhance significantly the capacity of OWC systems as reported in [9]- [12].…”