The stability of Plug and Play quantum cryptography system Using a double-phase modulation method

Title
The stability of Plug and Play quantum cryptography system Using a double-phase modulation method
Authors
권오성우민기이민수박병권김일영김용수문성욱한상욱
Issue Date
2013-10
Publisher
2013 가을 한국물리학회
Abstract
We introduce a simple and robust polarization-insensitive phase modulation method that is suitable for a plug and play quantum key distribution system, with a polarization sensitive phase modulator. The pulse arrived at Alice is modulated twice before and after it is reflected by a Faraday mirror that is located at the end of Alice. We realize the phase modulation method and verify it by observing a single-photon interference with high visibility (>95%) regardless of the polarization of the signal. The phase modulation method is successfully applied to a plug and play quantum key distribution system and consistently provides less than 5% of quantum bit error rate under changing environmental condition.
URI
http://pubs.kist.re.kr/handle/201004/46719
Appears in Collections:
KIST Publication > Conference Paper
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