Refractive index measurement of cerium-doped LuxY 2-xSiO5 single crystal

Abstract

Principal refractive indices of the biaxial cerium-doped Lu xY2-xSiO5 (LYSO) crystal were determined with high accuracy at seven different wavelengths between 400 and 700 nm using the classical minimum angle of deviation method. The reliability of the measured data permitted to deduce parameters of a common dispersion formula, by which the refractive indices can be extrapolated for wavelengths up to 1100 nm, an important range for laser applications. The extent of axial dispersion was precisely measured by ellipsometry, its effects on the anisotropic refractive index has been calculated. Examples are given to demonstrate the influence of anisotropy on the operation of optical devices. © 2011 Elsevier B.V. All rights reserved.