Detection of the ultranarrow temporal correlation of twin beams via sum-frequency generation

Details Detection of the ultranarrow temporal correlation of twin beams via sum-frequency generation Detection of the ultranarrow temporal correlation of twin beams via sum-frequency generation

2012-03-16

arxiv.org/abs/1203.3661v1

Physics

Quantum Physics

Scientific paper

We demonstrate the ultranarrow temporal correlation (6 fs full width half maximum) of twin beams generated by parametric down-conversion, by using the inverse process of sum-frequency generation. The result relies on an achromatic imaging of a huge bandwith of twin beams and on a careful control of their spatial degrees of freedom. The detrimental effects of spatial filtering and of imperfect imaging are shown toghether with the theoretical model used to describe the results.

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