FEATURES OF THE DEFECT STRUCTURE AND OPTICAL PROPERTIES OF AN LiNbO3:Mg(5.05):Fe(0.009 mol%) CRYSTAL

摘要

Defects and optical properties of LiNbO3:Mg(5.05):Fe(0.009 mol%) are studied by IR absorption spectroscopy, Raman spectroscopy, laser conoscopy, and optical spectroscopy. Absorption bands corresponding to OH stretching vibrations are shifted to higher frequencies and are narrower in the spectrum of this crystal than in the spectrum of a nominally pure congruent LiNbO(3)crystal. This indicates that the OH groups are more ordered and the O-H bonds are more rigid in the structure of LiNbO3:Mg(5.05 ):Fe(0.009 mol%) than in the congruent crystal.