Polarization time and length for random optical beams
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© 2008 American Physical Society (APS). http://www.aps.org/
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2008
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Language
en
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033817
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Physical Review A, Volume 78, Issue 3
Abstract
We investigate the dynamics of the instantaneous polarization state of stationary, partially polarized random electromagnetic beamlike fields. An intensity-normalized correlation function of the instantaneous Poincaré vector is introduced for the characterization of the time evolution of the polarization state. This polarization correlation function enables us to define a polarization time and a polarization length over which the polarization state remains substantially unchanged. In the case of Gaussian statistics, the polarization correlation function is shown to assume a simple form in terms of the parameters employed to characterize partial coherence and partial polarization of electromagnetic fields. The formalism is demonstrated for a partially polarized, temporally Gaussian-correlated beam, and black-body radiation. The results are expected to find a range of applications in investigations of phenomena where polarization fluctuations of light play an important role.Description
Keywords
random optical beams, random electromagnetic beams, polarization time, polarization length, dynamics, polarization state, correlation function
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Citation
Setälä, Tero & Shevchenko, Andriy & Kaivola, Matti & Friberg, Ari T.. 2008. Polarization time and length for random optical beams. Physical Review A. Volume 78, Issue 3, 033817. ISSN 1094-1622 (electronic). ISSN 1050-2947 (printed). DOI: 10.1103/physreva.78.033817.