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Adaptive free-space optical communications through turbulence using self-healing Bessel beams
1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Scientific Reports
|February 24, 2017
Summary
This study introduces a method for stable free-space optical communication using self-healing Bessel beams and adaptive compensation. This technique enhances data transmission reliability in challenging atmospheric conditions.
Area of Science:
- Optical Communications
- Free-space Optics
- Quantum Information
Background:
- Orbital Angular Momentum (OAM) multiplexing offers high-capacity data transmission.
- Free-space optical links are susceptible to atmospheric turbulence and obstructions, degrading signal quality.
- Bessel beams possess self-healing properties, making them resilient to scattering.
Purpose of the Study:
- To develop and demonstrate an obstruction- and turbulence-tolerant free-space OAM multiplexing link.
- To compensate for signal degradation caused by atmospheric turbulence and physical obstructions.
- To improve the performance and reliability of OAM-based free-space communication systems.
Main Methods:
- Utilizing self-healing Bessel beams for data transmission.
- Implementing adaptive compensation techniques to counteract environmental disturbances.
- Employing 16-ary quadrature amplitude modulation (16-QAM) for data encoding.
- Emulating atmospheric turbulence and obstructions in a controlled experimental setup.
Main Results:
- Effective compensation of signal degradation caused by emulated turbulence and obstructions.
- Significant reduction in inter-channel crosstalk.
- Improvement in bit-error rate (BER) performance.
- Recuperation of the nondiffracting and self-healing properties of Bessel beams.
Conclusions:
- The proposed scheme demonstrates robust performance for free-space OAM multiplexing links.
- Adaptive compensation techniques effectively mitigate the adverse effects of atmospheric turbulence and obstructions.
- The technology holds promise for future high-capacity, reliable free-space optical communication systems.
