1999
DOI: 10.1364/ol.24.000104
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Phase-modulation transmission system for quantum cryptography

Abstract: We describe a new method for quantum key distribution that utilizes phase modulation of sidebands of modulation by use of integrated electro-optic modulators at the transmitting and receiving modules. The system is shown to produce constructive or destructive interference with unity visibility, which should allow quantum cryptography to be carried out with high flexibility by use of conventional devices.

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Cited by 80 publications
(40 citation statements)
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“…In view of the proven success of sideband encoding for long distance QKD [19][20][21][22], this seems a promising technique for quantum communication. On the other hand, the class of unitary transformations explored in this work is somewhat limited, as it depends only on 2 parameters, see Eqs (1,2).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…In view of the proven success of sideband encoding for long distance QKD [19][20][21][22], this seems a promising technique for quantum communication. On the other hand, the class of unitary transformations explored in this work is somewhat limited, as it depends only on 2 parameters, see Eqs (1,2).…”
Section: Discussionmentioning
confidence: 99%
“…Our experimental techniques follow closely those of QKD systems in which the quantum information is encoded in frequency sidebands of an attenuated coherent state [19][20][21]. Such systems allow efficient transmission of quantum information at telecommunication wavelengths.…”
Section: Introductionmentioning
confidence: 96%
“…The Ω value is typically several gigahertz for SCWQC systems [3,8]; we used a value of 4 GHz in our calculations. Therefore, the maximum tolerable synchronization signal time delay is 1.7 ps.…”
Section: Process Modelingmentioning
confidence: 99%
“…In this paper, we consider a subcarrier wave quantum communication system (SCWQC), important for practical applications [3]. One of the key features of the practical QC systems is the signal transmitted through a separate channel which synchronizes its transmitter and receiver modules.…”
Section: Introductionmentioning
confidence: 99%
“…Debido a la longitud de onda utilizada (aproximadamente 1550 nm), esta condición no es fácil de cumplir. Para solucionar este problema, Goedgebauer y su equipo [29][30][31] propusieron un esquema alternativo donde el bit es codificado en la diferencia de fase que existe entre las bandas y una portadora óptica sujetas a una modulación de radiofrecuencia. En la figura 2.6, se puede observar un sistema que funciona con esta codificación.…”
Section: Sistemas Con Codificación En Frecuenciaunclassified