Open AccessCharacterizing the polarization and cross-polarization of electromagnetic vortex pulses in the space-time and space-frequency domain
Author(s) -
Meilan Luo,
Daomu Zhao
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.004153
Subject(s) - polarization (electrochemistry) , physics , degree of polarization , optics , vortex , polarization rotator , stokes parameters , electromagnetic radiation , linear polarization , coherence (philosophical gambling strategy) , coherence theory , computational physics , coherence length , scattering , laser , condensed matter physics , quantum mechanics , chemistry , birefringence , thermodynamics , superconductivity
The dynamics of the degree of polarization and the degree of cross-polarization for electromagnetic pulsed vortex beams in dispersive media are explored both in the space-time and space-frequency domains. It is shown that the impacts, arising from the second-order dispersion coefficient and the temporal coherence length, on the variations of the temporal degree of polarization are distinctly different from those on the spectral degree of polarization. Besides, we also suggest a method to access the measurement of the orbital angular momentum of pulsed vortex beams through the mapping relationship between the distribution of the temporal degree of cross-polarization and the number of topological charge.