Jointly increasing modulation cardinality and controlling beam diameter in LG-OAM free-space optical communication using convolutional neural network

This tutorial discusses optical communication systems that propagate light carrying orbital angular momentum through random media and use machine learning (aka artificial intelligence) to classify the distorted images of the received alphabet symbols. We assume the reader is familiar with either optics or machine learning but is likely not an expert in both. We review select works on machine learning applications in various optics areas with a focus on beams that carry orbital angular momentum. We then discuss optical experimental design, including generating Laguerre–Gaussian beams, creating and characterizing optical turbulence, and engineering considerations when capturing the images at the receiver. We then provide an accessible primer on convolutional neural networks, a machine learning technique that has proved effective at image classification. We conclude with a set of best practices for the field and provide an example code and a benchmark dataset for researchers looking to try out these techniques.

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Unidirectional transmission of optical waveguides in optical communication bands based on the valley Hall effect

Yang,

Chen

2024

Journal of Optical Communications

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Unidirectional transmission of optical waveguides in optical communication bands has been a difficult problem in the field of optical communication. In this paper, the valley Hall effect is utilized to enhance the transmission efficiency of optical wave in optical communication system. Valley photonic crystal is selected as the main material of optical waveguide in optical communication band. Valley photonic crystal is composed of air columns periodically arranged according to the honeycomb lattice in the dielectric material, which shows the valley Hall topological effect in transverse electric wave mode. By introducing the energy valley degree of freedom into the photonic crystal, the light wave is transmitted locally on the dielectric material at the interface, and the control of the dielectric material realizes the regulation of light transmission. The Chern number of optical waveguide topology in the optical communication band, the exchange phenomenon occurs at the same energy band position and realizes efficient unidirectional transmission of optical waveguides in optical communication bands. The experimental results show that the optical communication band optical waveguide based on the valley Hall effect has unique unidirectional transmission characteristics and robustness to cornering and is capable of realizing unidirectional optical transmission in optical communication systems.

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Jointly increasing modulation cardinality and controlling beam diameter in LG-OAM free-space optical communication using convolutional neural network

Cited by 3 publications

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Ground Simulation and Pattern Recognition for Arbitrary Distance Optical Transmission of a Free-Space Laser Communication System

Ground Simulation and Pattern Recognition for Arbitrary Distance Optical Transmission of a Free-Space Laser Communication System

Classifying beams carrying orbital angular momentum with machine learning: tutorial

Unidirectional transmission of optical waveguides in optical communication bands based on the valley Hall effect

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