GaN-based blue micro-laser diodes for visible light communication
Abstract
Visible light communication (VLC) is attracting growing interest for energy-efficient, high-bandwidth links for next-generation data centers. GaN-based blue edge-emitting micro-laser diodes (micro-LDs) with cavity lengths down to 40 μm are demonstrated based on optical resonance between a cleaved facet and an etched facet with laterally deposited distributed Bragg reflector. The threshold current as low as 9.6 mA and slope efficiency of 0.32 W/A are achieved for an 80 μm-cavity-length device. The VLC characteristics of 140 μm micro-LD show a broader −3 dB modulation bandwidth of 429 MHz and a higher data rate of 5.3 Gbps, compared with those of standard 500 μm LD. These results demonstrate the potential application of GaN-based blue edge-emitting micro-LDs as a compact and low-power laser platform for augmented/virtual reality displays and short-distance optical communication for inter-chip optical interconnections.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (8)
Chunlei Tao
The School of Integrated Circuits, Dalian University of Technology 1 , Dalian 116024,
Xiaoyu Ren
Aiqin Tian
Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences 2 , Suzhou 215123,
Leihao Sun
College of Future Information Technology, Fudan University 3 , Shanghai 200433,
Xinyi Jiang
State Key Laboratory of Discovery and Utilization of Functional Components in Traditional Chinese Medicine, Shandong Key Laboratory of Targeted Drug Delivery and Advanced Pharmaceutics, National Medical Products Administration Key Laboratory for Technology Research and Evaluation of Drug Products and Key Laboratory of Chemical Biology (Ministry of Education), Department of Pharmaceutics, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University
Chao Shen
State Key Laboratory of Semiconductor Physics and Chip Technologies
Hezhi Zhang
The School of Integrated Circuits, Dalian University of Technology 1 , Dalian 116024,
Jianping Liu