A method is presented for the first time to our knowledge for generating multiple-channel polarization-entangled photon pairs simultaneously based on type II quasi-phase-matched spontaneous parametric downconversion pumped by monochromatic light in a single periodically poled lithium niobate (PPLN) crystal. The expression for the count of the polarization-entangled photon pairs is analytically obtained. It is predicted that one-, two-, and even three-channel polarization-entangled photon pairs can be simultaneously generated just by suitably choosing the PPLN grating period and the pump frequency.
© 2007 Optical Society of America
Original Manuscript: June 5, 2007
Revised Manuscript: July 18, 2007
Manuscript Accepted: July 24, 2007
Published: September 4, 2007
Shiming Gao and Changxi Yang, "Prediction of multichannel polarization-entangled photon pairs in a single periodically poled lithium niobate with a monochromatic pump," Opt. Lett. 32, 2653-2655 (2007)