A new scheme using convolutional neural network to recognize orbital angular momentum beams disturbed by atmospheric turbulence

2020 ◽  
Author(s):  
Jin Wang ◽  
Bing Zhu
Keyword(s):  
Neural Network ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Atmospheric Turbulence ◽  
Orbital Angular Momentum

scholarly journals Convolutional Neural Network Based Atmospheric Turbulence Compensation for Optical Orbital Angular Momentum Multiplexing

2020 ◽  
Vol 38 (7) ◽  
pp. 1712-1721
Author(s):  
Wenjie Xiong ◽  
Peipei Wang ◽  
Menglong Cheng ◽  
Junmin Liu ◽  
Yanliang He ◽  
...  
Keyword(s):  
Neural Network ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Atmospheric Turbulence ◽  
Orbital Angular Momentum

scholarly journals Experimental Study of Atmospheric Turbulence Detection Using an Orbital Angular Momentum Beam Via a Convolutional Neural Network

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 184235-184241
Author(s):  
Xiaoli Yin ◽  
Xiaozheng Chen ◽  
Huan Chang ◽  
Xiaozhou Cui ◽  
Yuanzhi Su ◽  
...  
Keyword(s):  
Neural Network ◽  
Experimental Study ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Atmospheric Turbulence ◽  
Orbital Angular Momentum

scholarly journals Convolutional Neural Network Assisted Optical Orbital Angular Momentum Identification of Vortex Beams

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 193801-193812
Author(s):  
Wenjie Xiong ◽  
Yi Luo ◽  
Junmin Liu ◽  
Zebin Huang ◽  
Peipei Wang ◽  
...  
Keyword(s):  
Neural Network ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Orbital Angular Momentum ◽  
Vortex Beams

Mode detection of misaligned orbital angular momentum beams based on convolutional neural network

2018 ◽  
Vol 57 (35) ◽  
pp. 10152 ◽  
Author(s):  
Qingsong Zhao ◽  
Shiqi Hao ◽  
Yong Wang ◽  
Lei Wang ◽  
Xiongfeng Wan ◽  
...  
Keyword(s):  
Neural Network ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Orbital Angular Momentum ◽  
Mode Detection

scholarly journals Convolutional Neural Network-Assisted Optical Orbital Angular Momentum Recognition and Communication

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 162025-162035 ◽  
Author(s):  
Peipei Wang ◽  
Xiaomin Zhang ◽  
Dianyuan Fan ◽  
Junmin Liu ◽  
Lijuan Sheng ◽  
...  
Keyword(s):  
Neural Network ◽  
Angular Momentum ◽  
Convolutional Neural Network ◽  
Orbital Angular Momentum

scholarly journals Modal coupling and crosstalk due to turbulence and divergence on free space THz links using multiple orbital angular momentum beams

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zhe Zhao ◽  
Runzhou Zhang ◽  
Hao Song ◽  
Kai Pang ◽  
Ahmed Almaiman ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Atmospheric Turbulence ◽  
Channel Capacity ◽  
Orbital Angular Momentum ◽  
Beam Waist ◽  
Modal Coupling ◽  
Divergence Effect ◽  
Power Leakage ◽  
Calm Weather ◽  
Bad Weather

AbstractOrbital-angular-momentum (OAM) multiplexing has been utilized to increase the channel capacity in both millimeter-wave and optical domains. Terahertz (THz) wireless communication is attracting increasing attention due to its broadband spectral resources. Thus, it might be valuable to explore the system performance of THz OAM links to further increase the channel capacity. In this paper, we study through simulations the fundamental system-degrading effects when using multiple OAM beams in THz communications links under atmospheric turbulence. We simulate and analyze the effects of divergence, turbulence, limited-size aperture, and misalignment on the signal power and crosstalk of THz OAM links. We find through simulations that the system-degrading effects are different in two scenarios with atmosphere turbulence: (a) when we consider the same strength of phasefront distortion, faster divergence (i.e., lower frequency; smaller beam waist) leads to higher power leakage from the transmitted mode to neighbouring modes; and (b) however, when we consider the same atmospheric turbulence, the divergence effect tends to affect the power leakage much less, and the power leakage increases as the frequency, beam waist, or OAM order increases. Simulation results show that: (i) the crosstalk to the neighbouring mode remains < − 15 dB for a 1-km link under calm weather, when we transmit OAM + 4 at 0.5 THz with a beam waist of 1 m; (ii) for the 3-OAM-multiplexed THz links, the signal-to-interference ratio (SIR) increases by ~ 5–7 dB if the mode spacing increases by 1, and SIR decreases with the multiplexed mode number; and (iii) limited aperture size and misalignment lead to power leakage to other modes under calm weather, while it tends to be unobtrusive under bad weather.

Sign in / Sign up

Export Citation Format

Share Document