Properties and Defects of Sr~(2+)-doped α-BBO Crystal

High-quality Sr2+-doped a-BBO crystals were grown by the Czochralski method. The result of X-ray diffraction indicates that the grown crystals are α-BBO crystal. The results of transmission and birefractive indices show that Sr2+ ions do not affect the optical properties of α-BBO. The measurements of DSC-TG and thermal expansion coefficient of Sr2+-doped a-BBO crystal manifest that Sr2+ ions also do not influence the thermal properties of α-BBO. Meanwhile, the study of defects investigated by chemical etching illustrates that the quality of seed crystal is the most important factor of the quality of as-grown crystals.