High-fidelity entangled-photon link for quantum key distribution testbed

Giovanni Di Giuseppe; Alexander V. Sergienko; Bahaa E. A. Saleh; Malvin C. Teich

doi:10.1117/12.488519

4 August 2003 High-fidelity entangled-photon link for quantum key distribution testbed

Giovanni Di Giuseppe, Alexander V. Sergienko, Bahaa E. A. Saleh, Malvin C. Teich

Author Affiliations +

Proceedings Volume 5105, Quantum Information and Computation; (2003) https://doi.org/10.1117/12.488519
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

We report on the construction of polarization-entangled photon sources for quantum key distribution (QKD) testbed using nonlinear optical process of spontaneous parametric down-conversion (SPDC) pumped by a 266-nm and 351-nm continuous wave (cw) and a 415-nm femtosecond-pulsed laser sources. The efficient coupling of down-converted photons at 702 nm and 830 nm into optical single-mode fiber has enabled us to increase the rate of entangled-photon pairs available for transmission over communication channels with a high degree of polarization entanglement. The detection and characterization of the entangled-photon-state properties has been performed using commercially available Silicon avalanche photodiodes (APD) as well as using a novel photon-number-resolving cryogenic photodetector, which has been developed by our colleagues at the Boulder Division of NIST and brought to BU for tests with elements of the future DARPA Quantum Network.

Citation Download Citation

Giovanni Di Giuseppe, Alexander V. Sergienko, Bahaa E. A. Saleh, and Malvin C. Teich "High-fidelity entangled-photon link for quantum key distribution testbed", Proc. SPIE 5105, Quantum Information and Computation, (4 August 2003); https://doi.org/10.1117/12.488519

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