Integrated quantum key distribution system using single sideband detection

Mérolla, Jean-Marc; Duraffourg, Laurent; Goedgebuer, J.-P.; Soujaeff, A.; Patois, F.; Rhodes, William T.

doi:10.1140/epjd/e20020017

Cited by 11 publications

(4 citation statements)

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“…This implies that in laboratory experiments, no stabilization is required. In field experiments, however, where propagation distances are tens of kilometres, the local RF oscillators must be synchronized, as was done for instance in [27].…”

Section: A Note On Phase Accumulation During Propagationmentioning

confidence: 99%

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Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Olislager¹,

Mbodji²,

Woodhead³

et al. 2012

New J. Phys.

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Frequency-entangled photons can be readily produced using parametric down-conversion. We have recently shown how such entanglement could be manipulated and measured using electro-optic phase modulators and narrow-band frequency filters, thereby leading to two-photon interference patterns in the frequency domain. Here we introduce new theoretical and experimental developments showing that this method is potentially a competitive platform for the realization of quantum communication protocols in standard telecommunication fibres. We derive a simple theoretical expression for the coincidence probabilities and use it to optimize a Bell inequality. Furthermore, we establish an equivalence between the entangled-photon scheme and a classical interference scheme. Our measurements of two-photon interference in the frequency domain yield raw visibilities in excess of 99%. We use our high-quality setup to experimentally validate the theoretical predictions, and in particular we report a violation of the CH74 inequality by more than 18 standard deviations.

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Section: A Note On Phase Accumulation During Propagationmentioning

confidence: 99%

“…Note that replacing mechanically variable attenuators by remotely controlled components would allow full automatization of the system. Note also that for long-distance experiments it is possible to use two synchronized RF generators instead of one, as shown in [27].…”

mentioning

confidence: 99%

Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Olislager¹,

Mbodji²,

Woodhead³

et al. 2012

New J. Phys.

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show abstract

“…At the output of the EML, the optical signal contains the reference carrier ω0 and two sidebands ω0 ± Ω. The quantum mechanical description of the EML's output can be written as a superposition of coherent states, following the methodology reported in [15]:…”

Section: Dual-function Transmitter Station: Implementation and Charac...mentioning

confidence: 99%

“…,where we have considered random phases φ1 and φ2 for the two sidebands. The selection of appropriate phases can be adopted for implementing protocols based on the phase coding [15]. It is evident by Eq.1, that two sidebands on either side of the carrier are generated with a peak wavelength at 194.68THz ± 28GHz (1539.9 ± 0.22nm).…”

Section: Dual-function Transmitter Station: Implementation and Charac...mentioning

confidence: 99%

Practical decoy-state sender implemented over analog RoF transmitters for secure 5G and beyond x-haul connections

Giannoulis

Ntanos

Stathis

et al. 2023

Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII

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A novel transmitter implementation, which will be capable of operating in both classical and quantum light regimes since it will be able to send single photons across a quantum channel and at the same time to serve as analog RoF transmitter currently deployed in X-haul topologies, is proposed. By spectrally isolating the sidebands of analog RoF signal and by controlling the EML’s modulation index, different mean photon numbers launched in one sideband can be obtained. We report on the architecture of our proposed transmitter station, and we demonstrate its operation through proof-of-concept experiments by performing successful RoF transmission links and by carrying out photon-counting measurements. The transmission of 200 Mbaud QPSK-modulated signal with acceptable EVM measurements of < 17.5%, as well the variation of the mean count rate of the filtered sideband as a function of the peak-to-peak driving voltage of radio signal at 28GHz were successfully performed, confirming that the sidebands of A-RoF transceivers can be used as single-photon carriers for quantum information.

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Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

et al. 2022

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Integrated quantum key distribution system using single sideband detection

Cited by 11 publications

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Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Implementing two-photon interference in the frequency domain with electro-optic phase modulators

Practical decoy-state sender implemented over analog RoF transmitters for secure 5G and beyond x-haul connections

Deterministic and complete hyperentangled Bell states analysis assisted by frequency and time interval degrees of freedom

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