Open AccessIdentifying non-stationarities in random EM fields: are speckles really disturbing?
Author(s) -
John Broky,
Jeremy Ellis,
Aristide Dogariu
Publication year - 2008
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.16.014469
Subject(s) - speckle pattern , optics , snapshot (computer storage) , random field , spatial frequency , computer science , physics , statistical physics , realization (probability) , mathematics , statistics , operating system
In dealing with random EM fields, ensemble averaging is an ubiquitous procedure. However, we demonstrate that spatial non-stationarities such as enhanced backscattering can be identified even from one single realization (snapshot) of the wave interaction with a random medium. Fourth-order correlations between field components at two different spatial points are shown to provide the necessary information.