We derive expressions for the far-zone correlation of intensity fluctuations (the Hanbury Brown-Twiss effect) that occurs in electromagnetic beams that are generated by quasi-homogeneous sources. Such sources often have a radiant intensity pattern that is rotationally symmetric, irrespective of the source shape. We demonstrate how from the far-zone correlation of intensity fluctuations the spectral density distribution across the source plane may be reconstructed.
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| http://dx.doi.org/10.1364/JOSAA.31.002152 | DOI Listing |
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