Corrections to refractive index data of stoichiometric lithium tantalate in the 5-6 μm range
We propose corrections to the coefficients in the published Sellmeier equation for stoichiometric LiTaO3 [Opt. Lett. 28, 194 (2003)] that allow the extension of the wavelength range within the region of midinfrared absorption edge up to 6 um. The required extraordinary refractive index data for this range were obtained using single-pass optical parametric fluorescence measurements with a pump wavelength of 1064.4 nm. We also observed efficient parasitic second-harmonic generation that could...[Show more]
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