Polarization properties of vectorial nonparaxial Gaussian beams in the far field

Sichuan University, Hua-yang, Sichuan, China
Optics Letters (Impact Factor: 3.29). 03/2005; 30(3):308-10. DOI: 10.1364/OL.30.000308
Source: PubMed


The polarization properties of vectorial coherent nonparaxial Gaussian beams are studied. It is shown that, when the source of a nonparaxial Gaussian beam is completely polarized, the degree of polarization of the propagation field maintains a constant value of 1. However, when the source is completely unpolarized, the degree of polarization does not maintain a constant value of 0. In the far field, vectorial nonparaxial Gaussian beams can become partially polarized, except on the propagation axis, and are spatially nonuniform across a typical cross section of the beam even though the source field is completely unpolarized.

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