Lasers, Fiber Optics, and Communications

Influences of uniaxial crystal on partially coherent multi-Gaussian Schell-model vortex beams

[+] Author Affiliations
Huilong Liu, Dong Chen, Jing Xia, Yanfei Lü, Li Zhang, Xiaoyun Pu

Yunnan University, School of Physical Science and Technology, 2 Cuihu North Road, Wuhua District, Kunming, Yunnan 650500, China

Yunnan University, Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, 2 Cuihu North Road, Wuhua District, Kunming, Yunnan 650500, China

Opt. Eng. 55(11), 116101 (Nov 08, 2016). doi:10.1117/1.OE.55.11.116101
History: Received July 17, 2016; Accepted October 17, 2016
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Abstract.  The evolution properties and the spectral degree of coherence of a partially coherent multi-Gaussian Schell-model vortex (MGSMv) beam propagating in uniaxial crystals orthogonal to the optical axis are studied. Propagation expression for the cross-spectral density and the average intensity of the partially coherent MGSMv beam propagating in uniaxial crystals are derived. Some analyses are illustrated by numerical examples related to the propagation properties and coherence vortices of the partially coherent MGSMv beam in uniaxial crystals. Numerical results show that, upon propagating in uniaxial crystals, the partially coherent MGSMv beam loses its initial dark center distribution. After propagating for sufficient distances, the partially coherent MGSMv beam will also evolve into a flat-topped beam. The evolution behavior of average intensity and coherent vortices depends on the crystal including the ratio of extraordinary and ordinary refractive indices, and beam parameters including the spatial correlation length and topological charge of the beams, as well as the propagation distance.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Huilong Liu ; Dong Chen ; Jing Xia ; Yanfei Lü ; Li Zhang, et al.
"Influences of uniaxial crystal on partially coherent multi-Gaussian Schell-model vortex beams", Opt. Eng. 55(11), 116101 (Nov 08, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.116101


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