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Opt Lett. 2012 Jan 15;37(2):151-3. doi: 10.1364/OL.37.000151.

Phase correlations and optical coherence.

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Department of Physics and Mathematics, University of Eastern Finland, Joensuu, Finland.


We examine the properties of the recently introduced degrees of coherence regarding the phase correlations of the optical field. It is seen that some of these quantities are straightforwardly related to the limits of complete dependence and complete independence of phases, which were used as the extremes of complete coherence and complete incoherence by Zernike in 1938. Certain other coherence measures are not in agreement with these limits in all situations. Our results elucidate the physical meaning of coherence in electromagnetic fields.


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