Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors.
In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically poled lithium niobate waveguide to generate the time-energy entanglement and superconducting single-photon detectors to detect the photon pairs after 100 km. We also demonstrate that the distributed photon pairs can still be useful for quantum key distribution and other quantum communication tasks.
Zhang
Qiang
Q
Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. qiangzh@stanford.edu
Takesue
Hiroki
H
Nam
Sae Woo
SW
Langrock
Carsten
C
Xie
Xiuping
X
Baek
Burm
B
Fejer
M M
MM
Yamamoto
Yoshihisa
Y
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008962:Models, Theoretical; D010783:Photometry / Q000295:instrumentation* / Q000379:methods; D017785:Photons; D013685:Telecommunications / Q000295:instrumentation*