Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

doi:10.1088/1674-1056/19/10/104001

Abstract We have derived the analytical expression of the electric cross-spectral density in the near- field of partially coherent vortex beams diffracted by an aperture. Taking the Gaussian Schell-model vortex beam as a typical example of partially coherent vortex beams, the spatial correlation properties and correlation vortices in the near-field of partially coherent vortex beams diffracted by a rectangle aperture are studied. It is shown that the off-axis displacement, spatial degree of coherence parameter, propagation distance, and the opening factor of the aperture affect the spectral degree of coherence and positions of correlation vortices. With the optimization algorithm, we obtain the symmetric distributing coherent vortex.

Keywords: spatial correlation property correlation vortex aperture diffraction near-field

Received: 20 December 2009
Revised: 24 May 2010
Accepted manuscript online:

PACS:	02.60.Nm	(Integral and integrodifferential equations)
	42.25.Fx	(Diffraction and scattering)

Fund: Project supported by the China Postdoctoral Science Foundation (Grant No. 2009450159) and the Foundation of the State Key Laboratory of Optical Technologies for Micro-Frabrication & Micro-Engineering, Chinese Academy of Sciences (Grant No. KF001).

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Li Jian-Long(李建龙) Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture 2010 Chin. Phys. B 19 104001

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Study correlation vortices in the near-field of partially coherent vortex beams diffracted by an aperture

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