Abstract

${\text{GdCa 4}}_{}\text{O}{\left({\text{BO}}_{\text{3}}\right)}_3$ has been found to have phase-matching points where the temperature variations of the phase-matching angles become zero for type-1 sum-frequency generation in the zx plane. We also found that the temperature sensitivities of the phase-matching conditions in the zx plane are different along the $\varphi =0°$ and $\varphi =180°$ directions in this material. In addition, the thermo-optic dispersion formula of this material that reproduces the temperature phase-matching properties of ${\text{GdCa 4}}_{}\text{O}{\left({\text{BO}}_{\text{3}}\right)}_3$ and ${\text{Gd}}_x{\text{Y}}_{\text{1 −}x}{\text{Ca}}_{\text{4}}{\text{O(BO}}_{\text{3}}{\text{) 3}}_{}$ is presented.

© 2006 Optical Society of America

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