Abstract

In this paper, to achieve higher robustness against atmospheric turbulence for high-capacity free-space optical (FSO) communications, an adaptive multi-modal FSO transceiver has been designed and experimentally demonstrated. We show that based on the dynamically estimated channel state information, modulation formats and power for different transmit modes can be adaptively allocated at the transmitter side. Meanwhile, at the receiver side, we show that the most suitable multi-input/multi-output decoder can be selected and employed to meet the requirement of forward error correction at the minimal expense of power consumption. By employing time-division multiplexed transmitter and receiver emulation and a spatial light modulator for turbulence emulation, an aggregate data rate of 590 Gbit/s/wavelength has been achieved when suffering from strong atmospheric turbulence, verifying the feasibility of the proposed adaptive transceiver over a turbulent FSO link. Moreover, to demonstrate practical applicability, all key devices such as transponder, multiplexer, and demultiplexer are commercially available in this work.

Single-wavelength transmission at 1.1-Tbit/s net data rate over a multi-modal free-space optical link using commercial devices

Zhouyi Hu, Yiming Li, David M. Benton, Abdallah A. I. Ali, Mohammed Patel, and Andrew D. Ellis
Opt. Lett. 47(14) 3495-3498 (2022)

Single-wavelength polarization- and mode-division multiplexing free-space optical communication at 689 Gbit/s in strong turbulent channels

Yiming Li, Zhaozhong Chen, David M. Benton, Mohammed Patel, Martin P. J. Lavery, and Andrew D. Ellis
Opt. Lett. 48(13) 3575-3578 (2023)

Turbulence-resistant high-capacity free-space optical communications using OAM mode group multiplexing

Long Zhu, Mingliang Deng, Bing Lu, Xiaojin Guo, and Andong Wang
Opt. Express 31(9) 14454-14463 (2023)

Demonstration of 10-channel mode- and polarization-division multiplexed free-space optical transmission with successive interference cancellation DSP

Yiming Li, Zhouyi Hu, David M. Benton, Abdallah Ali, Mohammed Patel, and Andrew D. Ellis
Opt. Lett. 47(11) 2742-2745 (2022)

Average capacity optimization in free-space optical communication system over atmospheric turbulence channels with pointing errors

Chao Liu, Yong Yao, Yun Xu Sun, Jun Jun Xiao, and Xin Hui Zhao
Opt. Lett. 35(19) 3171-3173 (2010)