Focusing of Partially Coherent Vortex Beams by an Aperture Lens
RAO Lian-Zhou 1,2, PU Ji-Xiong1
1Department of Electronic Science and Technology, Huaqiao University, Quanzhou 3620212Department of Physics and Electromechanical Engineering, Sanming University, Sanming 365004
Focusing of Partially Coherent Vortex Beams by an Aperture Lens
RAO Lian-Zhou 1,2; PU Ji-Xiong1
1Department of Electronic Science and Technology, Huaqiao University, Quanzhou 3620212Department of Physics and Electromechanical Engineering, Sanming University, Sanming 365004
摘要The focusing properties of partially coherent vortex wave fields are studied. Expressions are derived for the intensity distribution and the degree of coherence near the geometrical focus. It is found that the size of coherence vortex dark core in the focal region depends on the topological charges and normalized coherence lengths. It is found that the desired vortex dark core near the geometrical focus can be generated by choosing appropriate values of parameters. The degree of coherence possesses a pair of phase singularities regions in the geometrical focus neighbourhood.
Abstract：The focusing properties of partially coherent vortex wave fields are studied. Expressions are derived for the intensity distribution and the degree of coherence near the geometrical focus. It is found that the size of coherence vortex dark core in the focal region depends on the topological charges and normalized coherence lengths. It is found that the desired vortex dark core near the geometrical focus can be generated by choosing appropriate values of parameters. The degree of coherence possesses a pair of phase singularities regions in the geometrical focus neighbourhood.
(Particle beam focusing and bending magnets, wiggler magnets, and quadrupoles)
引用本文:
RAO Lian-Zhou; PU Ji-Xiong. Focusing of Partially Coherent Vortex Beams by an Aperture Lens[J]. 中国物理快报, 2007, 24(5): 1252-1255.
RAO Lian-Zhou, PU Ji-Xiong. Focusing of Partially Coherent Vortex Beams by an Aperture Lens. Chin. Phys. Lett., 2007, 24(5): 1252-1255.
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2007, Vol. 24 
