A5011949104- Orbital Angular Momentum in Optics
- Optical Wireless Communication Technologies
- Optical Polarization and Ellipsometry
- Sperm and Testicular Function
- Plant Reproductive Biology
- Photonic and Optical Devices
- Optical Coherence Tomography Applications
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
Hefei University of Technology
2018-2021
The vortex beam carrying orbital angular momentum (OAM) has attracted great attentions in optical communication field, which can extend the channel capacity of system due to orthogonality between different OAM modes. Generally, atmospheric turbulence distort helical phase fronts beams, presents a critical challenge effective recognition Recently, convolutional neural network (CNN), as model deep learning, been widely applied machine vision. In this paper, based on CNN theory, we make...
Orbital angular momentum (OAM) in optical vortices (OV) beams offers a new dimension of space mode because coaxially propagating OV with different azimuthal OAM states are mutually orthogonal.As result, the can be efficiently multiplexed and de-multiplexed to potentially increase capacity communication system.Therefore, up now, indices transverse spatial has been investigated for many times.This paper focuses on another mode, which called as radial Laguerre-Gaussian beam.A novel encoding...
Abstract In this paper, we have proposed an improved convolutional neural network model based on the ShuffleNet V2 for recognizing orbital angular momentum (OAM) modes OAM free space optical communication systems in environments of atmospheric turbulence (AT). The is trained by inputting intensity images Laguerre Gaussian beams, which can effectively finish training process due to its special designs, and recognize with high accuracy. Compared previous works single multiplexing modes, has...
The transmission of the orbital angular momentum (OAM) beam has attracted a lot attention in field free-space optical (FSO) communication. Usually, after transmitting atmospheric turbulences, helical phase-front OAM beams will be severely distorted, and there exist intermode crosstalk. As result, performance communication system degrade significantly. In this paper, we have investigated influences level turbulence strength to by changing refractive-index structural parameter C n 2 number...
As approximate non-diffracted beams, Bessel Gaussian (BG) beams are more suitable to be used in free-space optical (FSO) communication system than Laguerre (LG) vortex because of its self-recovering property. However, due the limitation detection method, multiplexing based on multiple (mBGBs) has not been investigated deeply. In this paper, we propose a method for simultaneous demodulation 36-mBGBs using 6 × phase hologram (MPH). To solve problem that energy some BG too low at end, is...
With the recent exponential developments of high-speed optical communications, traditional communications systems are showing their limitations. Over past decade, orbital angular momentum (OAM) is attracting more and research attention, due to its orthogonality between two OAM states, which supplies new degrees freedom can be used in fiber or free-space communication for increasing capacity. Here, we propose a novel de/multiplexing method based on combination March–Zehnder interferometer...