Broadband frequency doubling in unpoled SBN crystals in the thermal focusing regime
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We study experimentally broadband noncollinear second-harmonic generation in unpoled Strontium Barium Niobate crystals. We show the eects of thermal self-focusing on the parametric conversion, including spatial localization of the second-harmonic, increased eciency, and spectral broadening. 2006 Optical Society of America.