Influence of domain disorder on parametric noise in quasi-phase-matched quantum frequency converters

摘要

Ideal quantum frequency conversion (QFC) devices enable wavelength translation of a quantum state of light whilenpreserving its essential quantum characteristics, namely photon statistics and coherence. However, the generationnof noise photons due to spontaneous scattering of the strong classical pump used in the three-wave mixing processncan limit QFC fidelity. We experimentally and theoretically characterize the noise properties of a difference-nfrequency generation device for QFC and find that fabrication errors in the quasi-phase-matching grating enhancengeneration of noise photons by parametric fluorescence. © 2010 Optical Society of America