title: High-quality fiber-optic polarization entanglement distribution at 1.3 microm telecom wavelength.
abstract: We demonstrate high-quality distribution of 1.3 microm polarization-entangled photons generated from a fiber-coupled periodically poled KTiOPO(4) waveguide over 200 m fiber-optic cables. Time-multiplexed measurements with a 19% efficient superconducting nanowire single-photon detector at the remote location show a detected flux of 5.8 pairs/s at a pump power of 25 microW and an average two-photon quantum-interference visibility of 97.7% without subtraction of accidentals.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. tzhong@mit.edu
authors.forename: Tian
authors.initials: T
authors.lastname: Zhong
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Hu
authors.forename: Franco N C
authors.initials: FN
authors.lastname: Wong
authors.forename: Karl K
authors.initials: KK
authors.lastname: Berggren
authors.forename: Tony D
authors.initials: TD
authors.lastname: Roberts
authors.forename: Philip
authors.initials: P
authors.lastname: Battle