Abstract
A microscopic multimode theory of collinear type-I spontaneous parametric
downconversion in a cavity is presented. Single-mode and multimode correlation
functions have been derived using fully quantized atom and electromagnetic field
variables. From a first principles calculation the FWHM of the single-mode
correlation function and the cavity enhancement factor have been obtained in
terms of mirror reflectivities and the first-order crystal dispersion
coefficient. The values obtained are in good agreement with recent experimental
results [Phys. Rev. A 62 , 033804 (2000)].
©2002 Optical Society of America
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