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

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

2011-08-03

arxiv.org/abs/1108.0902v2

Opt. Express 19(24), 24434-24447 (2011)

Physics

Quantum Physics

Scientific paper

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.

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