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Changes in the intensity distribution and polarization of non-uniformly polarized beams focused by a spherically aberrated lens with annular aperture
Authors:Haigang Liu
Affiliation:Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China
Abstract:Based on the generalized Huygens-Fresnel diffraction integral and beam coherence polarization (BCP) matrix formulation, the focusing properties of a type of non-uniformly polarized (NUP) beam through a spherical aberrated lens with annular aperture are studied. The dependence of focal shift, intensity distribution, power in the bucket (PIB) and degree of polarization on the spherical aberration coefficient, obscure ratio and polarization parameters is illustrated numerically. The focusing of NUP beams by a spherically aberrated lens with circular aperture is treated as a special case, where the inner radius of the aperture is equal to zero.
Keywords:Non-uniformly polarized (NUP) beam   Spherically aberrated lens   Annular aperture   Focusing property   Degree of polarization
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