Interferometry with Faraday mirrors for quantum cryptography
H. Zbinden, J. D. Gautier, N. Gisin, B. Huttner, A. Muller, W. Tittel
Abstract
Quantum Cryptography over 23km of installed Telecom fiber using a novel interferometer with Faraday mirrors is presented. The interferometer needs no alignment nor polarization control and features 99.8% fringe visibility. A secret key of 20kbit length with a error rate of 1.35% for 0.1 photon per pulse was produced.
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