High visibility two photon interference of frequency time entangled photons generated in a quasi phase matched AlGaAs waveguide

Abstract

We demonstrate experimentally the frequency time entanglement of photon pairs produced in a CW pumped quasi phased matched AlGaAs superlattice waveguide. A visibility of 96.0+-0.7% without background subtraction has been achieved, which corresponds the violation of Bell inequality by 52 standard deviations.

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