Abstract

We measured the index of refraction n( λ) of Zn-doped LiNbO 3 grown from a congruent melt as a function of the Zn concentration in the crystal. The Zn concentration c Zn in a sample was determined by electron microprobe technique. The refractive index n( λ, c Zn) is described by a generalized Sellmeier equation for 400 < λ < 1200 nm and c Zn up to 8 mol% ZnO. Calculated phase-matching conditions of nonlinear effects like second-harmonic generation are in excellent agreement with experimental results obtained with the same set of crystals.

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