Relationships between the complex degrees of coherence in the space-time and in the space-frequency domains.
A relationship is established between two correlation coefficients (complex degrees of coherence) frequently used in the theory of partially coherent optical fields. One of them characterizes correlation in the space-time domain, the other in the space-frequency domain. Some relations obtained previously by ad hoc methods are shown to readily follow from our general formula.
Friberg
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Wolf
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