Generation of spatially pure photon pairs in a multimode nonlinear waveguide using intermodal dispersion

Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek

We present experimental realization of type-II spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate (KTiOPO4) nonlinear waveguide. We demonstr…