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Opt Express. 2010 Apr 12;18(8):8182-6. doi: 10.1364/OE.18.008182.

Hong-Ou-Mandel dip measurements of polarization-entangled photon pairs at 1550 nm.

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1
Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST),1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan. yh.setsu@aist.go.jp

Abstract

We performed a quantum interference experiment using two polarization-entangled photon pairs at 1550 nm, created in periodically poled lithium niobate waveguides. Using four-fold coincidences, a Hong-Ou-Mandel dip at diagonal polarization was observed with a visibility of 74.5% before subtracting accidental coincidences. This experiment lays a foundation for demonstrating polarization-based entanglement swapping and for realizing a quantum relay.

PMID:
20588663
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