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Opt Express. 2011 Nov 21;19(24):24434-47. doi: 10.1364/OE.19.024434.

Generation of degenerate, factorizable, pulsed squeezed light at telecom wavelengths.

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1
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.

Abstract

We characterize a periodically poled KTP crystal that produces an entangled, two-mode, squeezed state with orthogonal polarizations, nearly identical, factorizable frequency modes, and few photons in unwanted frequency modes. We focus the pump beam to create a nearly circular joint spectral probability distribution between the two modes. After disentangling the two modes, we observe Hong-Ou-Mandel interference with a raw (background corrected) visibility of 86% (95%) when an 8.6 nm bandwidth spectral filter is applied. We measure second order photon correlations of the entangled and disentangled squeezed states with both superconducting nanowire single-photon detectors and photon-number-resolving transition-edge sensors. Both methods agree and verify that the detected modes contain the desired photon number distributions.

PMID:
22109470
[Indexed for MEDLINE]
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