期刊
OPTICS EXPRESS
卷 26, 期 20, 页码 25974-25988出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.26.025974
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资金
- National Natural Science Foundation of China (NSFC) [11504172, 91750201]
- National Natural Science Fund for Distinguished Young Scholar [11525418]
- Natural Science Foundation of Jiangsu Province [BK20150763]
- China Postdoctoral Science Foundation [7131701018]
- Postdoctoral Science Foundation of Jiangsu Province [7131707317]
- Fundamental Research Funds for the Central Universities [30917011336, 30916014112-001]
- Jiangsu Overseas Visiting Scholar Program for University Prominent Young & Middle-aged Teachers and Presidents
A new class of twisted Schell-model array correlated sources are introduced based on Mercer's expansion. It turns out that such sources can be expressed as superposition of fully coherent Laguene-Gaussian modes, and the twistable condition is established. Furthermore, on the basis of a stretched coordinate system and a quadratic approximation, analytical expressions for the mutual coherence function of an anisotropic non-Kolmogorov turbulence and the cross-spectral density of a twisted Gaussian Schell-model array beam are rigorously derived. Due to the presence of the twist phase, the beam spot and the degree of coherence rotate as they propagate, but their rotation centers are different. It is shown that the anisotropy of turbulence causes an anisotropic beam spreading in the horizontal and vertical directions. However, impressing a twist phase on source beams can significantly inhibit this effect. For an anticipated atmospheric channel condition, a comprehensive selection of initial optical signal parameters, receiver aperture sin and receiver capability, etc., is necessary. Our work is helpful for exploring new forms of twistable sources, and promotes guidance on optimization of partial coherent beam applications. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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