Physical Review A · 1997 · 496 citations · 20 references
Spectral InformationEngineeringNonlinear OpticsOptical Transmission SystemOptical AmplifierOptical PropertiesFamiliar Cw-pumped Down-conversionOptical CommunicationOptical PumpingPhotonicsPhysicsNon-linear OpticNonlinear CrystalsType-ii Down-conversionBroadband SourceApplied PhysicsFourth-order Interference ExperimentBroadband PumpOptoelectronics
This process differs from conventional cw‑pumped down‑conversion because a broadband pump supplies a wider range of photon‑pair energies. The study presents a model for broadband‑pumped type‑II parametric down‑conversion and proposes a fourth‑order interference experiment to illustrate its features. The nonlinear crystal’s properties and the orthogonal polarizations of the down‑converted photons cause their spectra to differ and reduce anticorrelation, an effect that grows with increasing pump bandwidth.
A model is presented to describe spontaneous type-II parametric down-conversion pumped by a broadband source. This process differs from the familiar cw-pumped down-conversion in that a broader range of pump energies is available for down-conversion. The properties of the nonlinear crystal determine how these energies are distributed into the down-converted photons. Because the two photons are polarized along different crystal axes, they have different spectral characteristics and are no longer exactly anticorrelated. As the pump bandwidth is increased, this effect becomes more pronounced. A fourth-order interference experiment is proposed, illustrating some of the features of broadband pumped down-conversion.
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Bell’s theorem without inequalities
Daniel M. Greenberger, Michael Horne, Abner Shimony et al. · American Journal of Physics · 1990 · 2.4K citations · Full text
‘‘Event-ready-detectors’’ Bell experiment via entanglement swapping
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