An ultrabright narrowband source of polarization-entangled photon pairs

Adrien Dousse, J. Suffczyński, A. Beveratos +6 more

Eser Keskiner

Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.

Hui Yan, J. F. Chen

Jeffrey H. Shapiro, N. C. Wong

Summary form only given. A type-II phase-marched parametric downconverter can be used to produce polarization-entangled photon pairs. We propose a production scheme for polarization-entangled photon pairs by using a pair of optical parametric amplifiers (OPAs) whose narrowband generation rate is high enough to make it a practical source for a trapped-atom quantum memory. For a type-II system using periodically-poled potassium titanyl phosphate (PPKTP) (KTiOPO/sub 4/) optical parametric amplifiers OPAs.

G. Bitton, Warren P. Grice, Lance Zhang +3 more

Jeffrey H. Shapiro, N. C. Wong

The signals and idlers from a pair of matched, doubly resonant optical parametric amplifiers (OPAs) can be combined to yield polarization-entangled vector signal and idler beams. Within any coincidence interval much longer than the OPA cavity lifetime, every signal photon of polarization is accompanied by an idler photon of the conjugate polarization ´, and vice versa. For periodically poled lithium tantalate OPAs, the pair production rate is estimated to be approximately 1.5 × 10 6 s -1 , within a 30 MHz bandwidth at a 795 nm centre wavelength and a 70 ns duration coincidence interval, using only 0.7 mW of pump power per OPA.