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Quantum Electronics and Laser Science Conference

Nonlinear upconversion interferometry

Aaron P. VanDevender, Paul G. Kwiat

Published Dec 10, 2005• 0 citations
Publisher

Abstract

We experimentally demonstrate the phase coherence of the upconversion process by upconverting time-bin states produced using two unbalanced Michelson interferometers.
DOI
10.1109/qels.2005.1548712

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We observed two-photon phase superresolution in an unbalanced Michelson interferometer with classical Gaussian laser pulses. Our work is a time-reversed version of a two-photon interference experiment using an unbalanced Michelson interferometer. A measured interferogram exhibits two-photon phase superresolution with a high visibility of 97.997.9%\ifmmode\pm\else\textpm\fi{}0.4%97.9. Its coherence length is about 22 times longer than that of the input laser pulses. It is a classical analog to the large difference between the one- and two-photon coherence lengths of entangled photon pairs.