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Spatial modes in waveguided parametric down-conversion
Andreas Christ, Kaisa Laiho, Andreas Eckstein +3
The propagation of several spatial modes has a significant impact on the structure of the emission from parametric down-conversion in a nonlinear waveguide. This manifests itself n…
Pure single photon generation by type-I PDC with backward-wave amplification
A. Christ, A. Eckstein, P. J. Mosley +1
We explore a promising method of generating pure heralded single photons. Our approach is based on parametric downconversion in a periodically-poled waveguide. However, unlike conv…
Fiber-assisted single-photon spectrograph
Malte Avenhaus, Andreas Eckstein, Peter J. Mosley +1
We demonstrate the implementation of a fiber-integrated spectrograph utilizing chromatic group velocity dispersion (GVD) in a single mode fiber. By means of GVD we stretch an ultra…
Tailored photon-pair generation in optical fibers
Offir Cohen, Jeff S. Lundeen, Brian J. Smith +3
We experimentally control the spectral structure of photon pairs created via spontaneous four-wave mixing in microstructured fibers. By fabricating fibers with designed dispersion,…
Conditional preparation of single photons using parametric downconversion: A recipe for purity
Peter J Mosley, Jeff S Lundeen, Brian J Smith +1
In an experiment reported recently [Phys. Rev. Lett. 100, 133601 (2008)], we demonstrated that, through group velocity matched parametric downconversion, heralded single photons ca…
Heralded Generation of Ultrafast Single Photons in Pure Quantum States
Peter J. Mosley, Jeff S. Lundeen, Brian J. Smith +4
We present an experimental demonstration of heralded single photons prepared in pure quantum states from a parametric downconversion source. It is shown that, through controlling t…