Experimental Demonstration of a 20-Mbit/s per Channel Free-Space Bi-directional Quantum Communication Link Using Orbital-Angular-Momentum Encoding and Multi-Port Mode Converters
Cong Liu, Kai Pang, Hao Ran Song, Guodong Xie, Jiapeng Zhao, Yongxiong Ren, Haoqian Song, Zhe Zhao, Runzhou Zhang, Long Li, Jing Lin Du, Seyed Mohammad Hashemi Rafsanjani, Guillaume Labroille, Pu Jian, Robert W. Boyd, Moshe Tur, Alan Eli Willner · Conference on Lasers and Electro-Optics · 2018
We experimentally demonstrate a free-space, bi-directional quantum communication link encoded by two OAM states using multi-port mode converters. We achieve a quantum-symbol-error-rate of − 0.058 for each channel at 20 Mbit/s/channel when OAM mode-spacing is 4.