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.
© 2005 Optical Society of America
Yoon-Ho Kim and Warren P. Grice, "Measurement of the spectral properties of the two-photon state generated via type II spontaneous parametric downconversion," Opt. Lett. 30, 908-910 (2005)