[摘要]：We present temperature-dependent refractive index along crystallographic b[010] and a direction perpendicular to (100)-plane for monoclinic phase (beta) Ga(2)O(3) single crystal grown by the optical floating zone technique. The experimental results are consistent with the theoretical result of Litimein et al. [ 1]. Also, the Sellmeier equation for wavelengths in the range of 0.4-1.55 mu m is formulated at different temperatures in the range of 30-175 degrees C. The thermal coefficient of refractive index in the above specified range is similar to 10(-5)/degrees C. (C) 2011 Optical Society of America
