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Properties of entangled photon pairs propagating in a Fabry-Perot resonator

Properties of entangled photon pairs generated in spontaneous parametric downconversion and propagating in a Fabry-Perot resonator are investigated. We assume the Fabry-Perot resonator in the path of one photon from an entangled photon pair. The second photon is delayed and then both photons enter the Hong-Ou-Mandel interferometer. We study how parameters of the resonator together with those of the pump field and nonlinear crystal determine the coincidence-count interference pattern.