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Diffraction of Gaussian vortex beam in uniaxial crystals orthogonal to the optical axis

Published online by Cambridge University Press:  28 January 2011

Jia Li ,
Yu Xin ,
Yanru Chen ,
Shixue Xu ,
Yongqing Wang ,
Muchun Zhou ,
Qi Zhao  and
Feinan Chen
Jia Li*
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Yu Xin
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Yanru Chen
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Shixue Xu
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Yongqing Wang
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Muchun Zhou
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Qi Zhao
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
Feinan Chen
Affiliation:
Department of Optical Engineering, Nanjing University of Science and Technology, 210094, Nanjing, P.R. China
*
lijiafeifei@sina.com
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Abstract

The diffraction of Gaussian vortex beams in uniaxial crystals orthogonal to the optical axis is studied. Analytical expressions for the components of the diffraction field are derived and illustrated by numerical examples. Results indicate that, upon diffraction of Gaussian vortex beams inside uniaxial crystals, components of the transversal and longitudinal electric fields would vary and show different characteristics. Effects of anisotropic crystals on intensity distributions of Gaussian vortex beams are also investigated. It demonstrates that, upon diffraction, intensity distributions would be distorted and rotated into elliptical profiles with the variation of the ratio of refractive indices. These influences may finally cause the non-symmetry of the intensity distributions of laser beams.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 53 , Issue 2 , February 2011 , 20701
Copyright
© EDP Sciences, 2011

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