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1 Mbps coherent one-way QKD with dense wavelength division multiplexing and hardware key distillation

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Title 1 Mbps coherent one-way QKD with dense wavelength division multiplexing and hardware key distillation
Title of Series The Annual Conference on Quantum Cryptography (QCRYPT) 2012
Number of Parts 30
Author Walenta, Nino
Contributors Centre for Quantum Technologies (CQT)
National University of Singapore (NUS)
License CC Attribution - NonCommercial - NoDerivatives 2.5 Switzerland:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.5446/36652
Publisher Eidgenössische Technische Hochschule (ETH) Zürich
Release Date 2012
Language English

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Subject Area Information technology
Abstract We present the latest results obtained with a quantum cryptography prototype based on a coherent-one way quantum key distribution (QKD) scheme. To support its continuous high rate secret key generation we developed different low-noise single photon detectors for telecom wavelength based on a sine gating and low-pass-filtering technique, as well as a negative feedback APD in an active hold-off circuit. A newly developed hardware distillation engine allows for continuous operation of secret key distribution up to 1 Mbps. We also present results of our system in a DWDM (dense wavelength-division multiplexing) configuration where only one single fiber is needed to interconnect Alice' and Bob's systems. The final prototype is fully compatible to serve a high-speed encryption device developed in parallel which provides encrypted communication of up to 100 Gbps.

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