This paper presents the first demonstration of InGaN multiple quantum well (MQW) based micro-photodetectors (µPD) used as the optical receiver in orthogonal frequency-division multiplexing (OFDM) modulated visible communication system (VLC). The 80-µm diameter µPD exhibits a wavelength-selective responsivity in the near-UV to violet regime (374 nm - 408 nm) under a low reverse bias of −3 V. The modulation scheme of 16-quadrature amplitude modulation (16-QAM) OFDM enables the use of frequency response beyond −3 dB cutoff bandwidth of µPD. A record high data rate of 3.2 Gigabit per second (Gpbs) was achieved as a result, which provides the proof-of-concept verification of a viable high speed VLC link.
Bibliographical noteFunding Information:
The authors gratefully acknowledge the financial support from King Abdulaziz City for Science and Technology (KACST), Grant No. KACST TIC R2-FP- 008, King Abdullah University of Science and Technology (KAUST) baseline funding, BAS/1/1614-01-01 and BAS/1/1657-01-01, and KAUST-KFUPM Special Initiative, Grant No. REP/1/2878.
© 2018 Optical Society of America.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics