Fiber-based telecom-band degenerate-frequency source of entangled photon pairs.
We demonstrate the generation of polarization-entangled photon pairs of degenerate frequency for the first time, to the best of our knowledge, in standard optical fiber using a novel dual-pump, counterpropagating configuration. Two-photon interference with >97% visibility is obtained. The purity of the photon source, as characterized by the ratio of coincidence to accidental-coincidence counts, is shown to be as high as 116 under suitable operating conditions.
Chen
Jun
J
Center for Photonic Communication and Computing, Department of Electrical Engineering and Computer Science Northwestern University, Evanston, IL 60208-3118, USA. junchen@ece.northwestern.edu
Lee
Kim Fook
KF
Liang
Chuang
C
Kumar
Prem
P