Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors

Qiang Zhang; Hiroki Takesue; Sae Woo Nam; Carsten Langrock; Xiuping Xie; Burm Baek; M M Fejer; Yoshihisa Yamamoto

doi:10.1364/oe.16.005776

Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors

Opt Express. 2008 Apr 14;16(8):5776-81. doi: 10.1364/oe.16.005776.

Authors

Qiang Zhang¹, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, Xiuping Xie, Burm Baek, M M Fejer, Yoshihisa Yamamoto

Affiliation

¹ Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. [email protected]

PMID: 18542687
DOI: 10.1364/oe.16.005776

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Computer Simulation
Computer-Aided Design*
Equipment Design
Equipment Failure Analysis
Fiber Optic Technology / instrumentation*
Models, Theoretical*
Photometry / instrumentation*
Photometry / methods
Photons
Telecommunications / instrumentation*