title: Measurement of the spectral properties of the two-photon state generated via type II spontaneous parametric downconversion.
abstract: We report complete measurement of the spectral properties of photon pairs generated via spontaneous parametric downconversion. The measurements, which include not only single-photon spectra but also two-photon joint spectra, were performed for both cw and ultrafast-pumping configurations. In agreement with theoretical predictions, the spectra for the ultrafast-pumped case reveal asymmetries that are not present with cw pumping.
authors.affiliation: Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang 790-784, South Korea. yoonho@postech.ac.kr
authors.forename: Yoon-Ho
authors.initials: YH
authors.lastname: Kim
authors.forename: Warren P
authors.initials: WP
authors.lastname: Grice