@inproceedings{bc906af7d83f479891f0f539892263b4,
title = "Analysis on the propagation characteristics of two multiplexed groups of coaxial OAM beams in atmospheric turbulence",
abstract = "Orbital angular momentum (OAM) as a new degree of freedom, greatly improves the spectrum efficiency and channel capacity of optical communication system. It has become the research focus in the field of optical communications. Some scholars have demonstrated that the feasibility of two multiplexed groups of concentric rings of Laguerre-Gaussian (LG) beams with OAM multiplexing transmission in free space. Based on the point, this paper makes the further research on the propagation characteristics of LG beams with this spatial multiplexing structure in atmospheric turbulence. The random phase screen is established by using the modified von Karman power spectrum and the received power and crosstalk power of OAM modes of LG beams are obtained under the Rytov approximation. We investigate the characteristic parameters of LG beams with this spatial multiplexing structure for mitigating turbulence. Simulation results show that the system exists an optimum beam waist related to wavelength in which the received power of OAM modes reaches the maximum. Meanwhile, the BER and aggregate capacity of the system with two multiplexed groups of concentric rings of LG beams with OAM multiplexing are simulated and analyzed under different intensities of atmospheric turbulence. The results reveal that the system with larger mode spacing generally has lower inter-modal crosstalk and larger aggregate capacity than that with the smaller mode spacing. Finally, on the basis of above the analysis and research, some suggestions for efficient OAM multiplexing detection scheme are proposed.",
keywords = "Free Space Optical Communication; OAM Multiplexing; Atmospheric Turbulence",
author = "Yongping Zheng and Qinghua Tian and Wei Zhang and Qi Zhang and Lei Zhu and Yongjun Wang and Bo Liu and Xiangjun Xin",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing ; Conference date: 28-10-2017 Through 30-10-2017",
year = "2018",
doi = "10.1117/12.2295348",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Fabien Bretenaker and Jian Chen and Yi Dong",
booktitle = "2017 International Conference on Optical Instruments and Technology",
address = "United States",
}