The stability of plug and play quantum cryptography system with double phase modulation method

Title
The stability of plug and play quantum cryptography system with double phase modulation method
Authors
권오성우민기이민수박병권김일영김용수한상욱문성욱
Keywords
QKD; Pulg and play; quantum; cryptography; double; PM
Issue Date
2014-02
Publisher
21회 한국반도체학술대회
Abstract
We introduce a simple and robust polarization-insensitive phase modulation method that is suitable for a plug and play quantum key distribution system [1], 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/201004/49163
Appears in Collections:
KIST Publication > Conference Paper
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