We experimentally demonstrate a new technique to control the type of frequency correlations of entangled photon pairs generated by spontaneous parametric downconversion. Frequency-correlated and frequency-anticorrelated photons are produced when a broadband pulse is used as a pump. The method is based on the control of the group velocities of the interacting waves and can be applied in any nonlinear medium and frequency band of interest.
© 2007 Optical Society of America
Original Manuscript: April 17, 2007
Revised Manuscript: June 14, 2007
Manuscript Accepted: June 17, 2007
Published: August 2, 2007
M. Hendrych, M. Micuda, and J. P. Torres, "Tunable control of the frequency correlations of entangled photons," Opt. Lett. 32, 2339-2341 (2007)