High-quality fiber-optic polarization entanglement distribution at 1.3 microm telecom wavelength.
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.
Zhong
Tian
T
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. tzhong@mit.edu
Hu
Xiaolong
X
Wong
Franco N C
FN
Berggren
Karl K
KK
Roberts
Tony D
TD
Battle
Philip
P