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We propose a novel scheme for broadband generation of photon pairs combined with efficient spatial pump filtering. This is achieved through spontaneous parametric down-conversion in a system of nonlinear adiabatically coupled waveguides.
We study experimentally the process of bi-photon generation through spontaneous parametric down-conversion in waveguide arrays. We show the formation of a unique spatial-spectral photon pattern and its dependence on the phase-matching conditions.
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