Abstract
The principal refractive indices of BiB3O6 (BIBO) crystal at different wavelengths in the temperature range from 30 to 170 °C were measured by the autocollimation method. The Sellmeier equations at different temperatures have been obtained. In order to check their reliability, the refractive indices at 0.532 µm and 1.319 µm at different temperatures are calculated by the Sellmeier equations and compared with the measured values. As a result, the difference between the calculated results and the measured results is less than 2 × 10−4. The calculated type I second harmonic generation angle of BIBO at 1.0640 µm is consistent with the measured result.
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