Measurement of the nonlinear phase shift induced by cascaded interactions in a periodically poled lithium niobate waveguide.

Opt Lett 2005 Sep;30(18):2448-50

Dipartimento di Elettronica, Università di Pavia, 27100 Pavia, Italy.

We report on the measurement of nonlinear phase shift phiNL induced by a strong pump at wavelength lamda p on a weak signal at lamda s through a cascade of two second-order interactions in a periodically poled lithium-niobate waveguide. The experiment is performed by use of an interferometric scheme especially designed to be insensitive to slow mechanical and thermal drift effects. The observed behavior of phiNL as a function of pump power and of wavelength difference lamda p - lamda s, is in good agreement with the theoretical predictions.

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http://dx.doi.org/10.1364/ol.30.002448DOI Listing
September 2005
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