The stability of Plug and Play quantum cryptography system Using a double-phase modulation method
- The stability of Plug and Play quantum cryptography system Using a double-phase modulation method
- 권오성; 우민기; 이민수; 박병권; 김일영; 김용수; 문성욱; 한상욱
- Issue Date
- 2013 가을 한국물리학회
- 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.
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- KIST Publication > Conference Paper
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