“Plug and play” systems for quantum cryptography
- 17 February 1997
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 70 (7) , 793-795
- https://doi.org/10.1063/1.118224
Abstract
We present a time-multiplexed interferometer based on Faraday mirrors, and apply it to quantum key distribution. The interfering pulses follow exactly the same spatial path, ensuring very high stability and self balancing. The use of Faraday mirrors compensates automatically any birefringence effects and polarization dependent losses in the transmitting fiber. First experimental results show a fringe visibility of 0.9984 for a 23-km-long interferometer, based on installed telecom fibers.Keywords
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