Abstract

A two-photon wave packet (a biphoton) produced by type-II parametric downconversion is studied in a simple beam-splitting experiment for its natural shape in space–time. The measured triangular shape of a two-photon correlation function is the signature of a rectangular-shaped biphoton. Inserting a birefringent sample into the beam causes a displacement of the vertex of the notch pattern, which can be used to measure the optical delay between the ordinary and the extraordinary rays in the sample with femtosecond resolution.

© 1995 Optical Society of America

Measurement of one-photon and two-photon wave packets in spontaneous parametric downconversion

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J. Opt. Soc. Am. B 20(9) 1959-1966 (2003)

Measurement of the spectral properties of the two-photon state generated via type II spontaneous parametric downconversion

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Efficient heralding of polarization-entangled photons from type-0 and type-II spontaneous parametric downconversion in periodically poled KTiOPO₄

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Beamlike twin-photon generation by use of type II parametric downconversion

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