High-Speed GaN-Based Superluminescent Diode for 4.57 Gbps Visible Light Communication
Dong Li, Chicheng Ma, Junfei Wang, Fangchen Hu, Yuqi Hou, Shanshan Wang, Junhui Hu, Shulan Yi, Yingnan Ma, Jianyang Shi, Junwen Zhang, Ziwei Li, Nan Chi, Liang Xia, Chao Shen
Abstract
Visible light communication (VLC) is a promising technology for next-generation high-speed optical wireless data links. Among various transmitters, GaN-based superluminescent diodes (SLDs) show interesting characteristics, including a large modulation bandwidth, droop free and low speckle noise, which makes them attractive for VLC applications. In this work, we design and fabricate a blue-emitting SLD utilizing tilted facet configuration. Using SLD as the light source, a VLC system is experimentally demonstrated. A record data rate of 4.57 gigabit per second (Gbps) is achieved with adaptive bit-loading discrete multiple tone (DMT) modulation, while the highest modulation format reaches 256 quadrature amplitude modulation (QAM). The corresponding bit error rate (BER) is ~3.5 × 10−3, which is below the forward error correction (FEC) threshold of 3.8 × 10−3.