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Polarization time and length for random optical beams
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Optics.
2008 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 78, no 3Article in journal (Refereed) Published
Abstract [en]

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 Poincare 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.

Place, publisher, year, edition, pages
2008. Vol. 78, no 3
Keyword [en]
black-body radiation, electromagnetic-fields, coherence, light
URN: urn:nbn:se:kth:diva-17857DOI: 10.1103/PhysRevA.78.033817ISI: 000259689400179ScopusID: 2-s2.0-51749104616OAI: diva2:335902
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Friberg, Ari T.
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