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arXiv · 1311.5037

Time-reversed two-photon interferometry for phase super-resolution

Kazuhisa Ogawa·Shuhei Tamate·Hirokazu Kobayashi·Toshihiro Nakanishi·Masao Kitano
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Abstract

We observed two-photon phase super-resolution 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 super-resolution with a high visibility of 97.9% \pm 0.4%. Its coherence length is about 22 times longer than that of the input laser pulses. It is a classical analogue to the large difference between the one- and two-photon coherence lengths of entangled photon pairs.

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Kazuhisa Ogawa, Shuhei Tamate, Hirokazu Kobayashi, Toshihiro Nakanishi, Masao Kitano. 2013-11-20. Time-reversed two-photon interferometry for phase super-resolution. https://doi.org/10.1103/physreva.88.063813

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