Thermo-optical parameters measured in ytterbium-doped potassium gadolinium tungstate

Oriented absorption and fluorescence spectra, refractive indices, thermal expansion, and thermal conductivities are reported for the anisotropic laser material ytterbium-doped potassium gadolinium tungstate, Yb3+:KGd(WO4)(2). Measurements of negative values for dn/dT lead to the report of several useful athermal orientations for laser propagation. (c) 2005 Optical Society of America.