Influence of the statistical and spatio-temporal features of laser pulse on its depolarization in a Kerr medium

Issue title: Atomic and molecular nonlinear optics: Theory, Experiment and Computation A homage to the pioneering work of Stanisław Kielich (1925-1993)

Guest editors: G. Maroulis, T. Bancewicz, B. Champagne and A.D. Buckingham

Article type: Research Article

Authors: Chernov, V.E.^{a; *} | Zon, B.A.^b

Affiliations: [a] Voronezh State University, Voronezh 394693, Russia | [b] Belgorod State University, Belgorod 308015, Russia

Correspondence: [*] Corresponding author. E-mail: chernov@niif.vsu.ru.

Abstract: Due to nonlinear rotation of polarization, the stochastic intensity and the spatio-temporal inhomogeneity of a multimode laser beam results to its depolarization when propagating in a nonlinear media. The ensemble and spatio-temporal averaging of Stokes parameters was performed analytically for an isotropic media and numerically for an anisotropic one. The experimentally measurable Stokes parameters show monotonic or oscillating decreasing dependence on the propagation distance; the characteristic depolarization length is evaluated. With respect to depolarization the anisotropic media is shown to behave like the isotropic one if the radiation intensity is sufficiently high. The measured value of depolarization agrees with the presented calculations.

Keywords: Multimode laser pulse, nonlinear self-rotation of polarization ellipse

DOI: 10.3233/JCM-2010-0348

Journal: Journal of Computational Methods in Sciences and Engineering, vol. 10, no. 3-6, pp. 183-195, 2010