scholarly journals Free-space optical communication with quasi-ring Airy vortex beam under limited-size receiving aperture and atmosphere turbulence

2021 ◽  
Author(s):  
Long Zhu ◽  
Andong Wang ◽  
Mingliang Deng ◽  
Bing Lu ◽  
Xiaojin Guo
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Vortex Beam ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Limited Size ◽  
Space Optical Communication ◽  
Atmosphere Turbulence

scholarly journals Intensity and Coherence Characteristics of a Radial Phase-Locked Multi-Gaussian Schell-Model Vortex Beam Array in Atmospheric Turbulence

Photonics ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 5
Author(s):  
Jialu Zhao ◽  
Guiqiu Wang ◽  
Xiaolu Ma ◽  
Haiyang Zhong ◽  
Hongming Yin ◽  
...  
Keyword(s):  
Atmospheric Turbulence ◽  
Optical Communication ◽  
Intensity Distribution ◽  
Free Space ◽  
Vortex Beam ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Beam Array ◽  
Space Optical Communication ◽  
Radial Phase

The theoretical descriptions for a radial phase-locked multi-Gaussian Schell-model vortex (RPLMGSMV) beam array is first given. The normalized intensity and coherence distributions of a RPLMGSMV beam array propagating in free space and atmospheric turbulence are illustrated and analyzed. The results show that a RPLMGSMV beam array with larger total number N or smaller coherence length σ can evolve into a beam with better flatness when the beam array translating into the flat-topped profile at longer distance z and the flatness of the flat-topped intensity distribution can be destroyed by the atmospheric turbulence at longer distance z. The coherence distribution of a RPLMGSMV beam array in atmospheric turbulence at the longer distance will have Gaussian distribution. The research results will be useful in free space optical communication using a RPLMGSMV beam array.

Simulation modeling of free space optical communication system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ajay Sharma ◽  
Rajinder Singh Kaler
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Simulation Modeling ◽  
Additive White Gaussian Noise ◽  
Wireless Channel ◽  
Free Space Optical Communication ◽  
Optical Wireless ◽  
Free Space Optical ◽  
Wireless Signal ◽  
Space Optical Communication

Abstract The optical wireless communication has been designed by developing a model with the support of MATLAB simulator using Simulink where channel considered to be a free space. In this model, Additive White Gaussian Noise (AWGN) channel has used to analyze bit error rate (BER) and power loss of optical wireless signal at receiver. The consequence due to turbulence in atmosphere of free space on transmitted signal has examined. The BER and signal power have extremely ruined on rigorous atmospheric unstable condition even for a short distance in an optical wireless channel. The BER of less than 10−3 has been achieved for free space optical communication considered to be an excellent BER for FSO.

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