| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Rottwitt, Karsten
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Topics
Publications (12/12 displayed)
- 2018Analytic description of four-wave mixing in silicon-on-insulator waveguidescitations
- 2017Study of Raman-free photon pair generation using inter-modal four-wave mixing in a few-mode silica fiber
- 2017Effects of Raman scattering and attenuation in silica fiber-based parametric frequency conversioncitations
- 2017Effects of noninstantaneous nonlinear processes on photon-pair generation by spontaneous four-wave mixingcitations
- 2012High-Energy Four-Wave Mixing, with Large-Mode-Area Higher-Order Modes in Optical Fibres
- 2009Measurement and modeling of low-wavelength losses in silica fibers and their impact at communication Wavelengthscitations
- 2008730-nm optical parametric conversion from near- to short-wave infrared bandcitations
- 2008Ge nanoclusters in PECVD-deposited glass caused only by heat treatmentcitations
- 2008Low Wavelength Loss of Germanium Doped Silica Fiberscitations
- 2007Ge nanoclusters in PECVD-deposited glass after heat treating and electron irradiationcitations
- 2004GE NANOCLUSTERS IN PLANAR GLASS WAVEGUIDES DEPOSITED BY PECVD
- 2003Sub-micrometer waveguide for nano-optics
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article
Effects of noninstantaneous nonlinear processes on photon-pair generation by spontaneous four-wave mixing
Abstract
We present a general model, based on a Hamiltonian approach, for the joint quantum state of photon pairs generated through pulsed spontaneous four-wave mixing, including nonlinear phase modulation and a finite material response time. For the case of a silica fiber, it is found that the pair-production rate depends weakly on the waveguide temperature, due to higher-order Raman scattering events, and more strongly on pump-pair frequency detuning. From the analytical model, a numerical scheme is derived, based on the well-known split-step method. This scheme allows computation of joint states where nontrivial effects are included, such as group-velocity dispersion and Raman scattering. In this work, the numerical model is used to study the impact of the noninstantaneous response on the prefiltering purity of heralded single photons. We find that for pump pulses shorter than 1 ps, a significant detuning-dependent change in quantum-mechanical purity may be observed in silica. This shows that Raman scattering not only introduces noise, but can also drastically change the spectral correlations in photon pairs when pumped with short pulses.