Abstract

The principal refractive indices and the thermal coefficients for a LiNbO3 crystal doped with 5 mol. % MgO have been measured by a minimum-deviation method for the wavelengths of 0.53975, 0.6328, 1.0795, and 1.3414, μm in the temperature range 20–154.5°C. The constants of modified Sellmeier equations are all given in the described temperature range. The measured results were used to calculate the type I critical phase-matching angles for 1.0795- and 1.3414-μm second-harmonic generation at room temperature and the noncritical phase-matching temperature for 1.0795-μm second-harmonic generation for LiNbO3 crystal doped with 5 mol. % MgO. The values obtained agree well with the experimental results.

© 1992 Optical Society of America

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