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Degrees of cross-polarization of a partially coherent electromagnetic beam in uniaxial crystals

Li J., Chen Y., Zhao Q., Zhou M.

Optica Applicata

2010

Vol. 40, nr 1

93--100

Propagation of degrees of cross-polarization of a partially coherent electromagnetic beam in uniaxial crystals orthogonal to the optical axis is investigated. Based on the paraxial theory of beams, analytical propagation formulas for degrees of cross-polarization are derived and analyses are illustrated by numerical examples. It is found that values of the degree of cross-polarization in uniaxial crystals fluctuate more rapidly with larger deviation of correlation length parameters (?ij - ?ii), but show slight variation with larger ratio of refractive index (ne/n0) or incident beam wavelength. Results also show that sources with sufficient correlation length parameters generate invariable degree of cross-polarization in uniaxial crystals.

Transmission of Elegant Laguerre-Gaussian beams at a dielectric interface - numerical simulations

Szabelak W., Nasalski W.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2009

Vol. 57, nr 2

181-188

Behavior of Laguerre-Gaussian beams impinged at a dielectric interface under distinct angles is discussed. For different incident angles the beams interact with the interface differently. Two ranges of incident angles, specified by a position of a spectral cone of beam field and related to a cross-polarization effect, are analyzed. Boundary between these two ranges is defined. Cases of critical incidence and total internal reflection are also discussed. Paraxial beams near the lower paraxial limit are considered. Theoretical predictions are confirmed by numerical simulations.