Journal
OPTICS EXPRESS
Volume 26, Issue 10, Pages 12605-12619Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.012605
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Funding
- Key Industrial Innovation Chain Project in Industrial Domain [2017ZDCXL-GY-06-02]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [61621005]
- Open Research Fund of State Key Laboratory of Pulsed Power Laser Technology [SKL2016KF05]
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Orbital angular momentum (OAM) mode crosstalk induced by atmospheric turbulence is a challenging phenomenon commonly occurring in OAM-based free-space optical (FSO) communication. Recent advances have facilitated new practicable methods using abruptly autofocusing light beams for weakening the turbulence effect on the FSO link. In this work, we show that a circular phase-locked Airy vortex beam array (AVBA) with sufficient elements has the inherent ability to form an abruptly autofocusing light beam carrying OAM, and its focusing properties can be controlled on demand by adjusting the topological charge values and locations of these vortices embedded in the array elements. The performance of a tailored Airy vortex beam array (TAVBA) through atmospheric turbulence is numerically studied. In a comparison with the ring Airy vortex beam (RAVB), the results indicate that TAVBA can be a superior light source for effectively reducing the intermodal crosstalk and vortex splitting, thus leading to improvement in the FSO system performance. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
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