Temperature dependencies of stimulated emission cross section for Nd-doped solid-state laser materials

Temperature dependencies of stimulated emission cross section for Nd:YAG, Nd:YVO4, and Nd:GdVO4 was carefully evaluated. Our spectral evaluations with fine spectral resolution were carried out under the condition that the population inversion was induced into samples by a weak pumping field. Within the temperature range from 15 degrees C to 65 degrees C, the variation of emission cross section at 1.06 mu m in Nd:YAG was -0.20%/degrees C, while those in Nd:YVO4 and Nd:GdVO4 for pi-polarization were -0.50%/degrees C and -0.48%/degrees C, respectively. Consideration of measured temperature dependence gave the numerical model for temperature dependent emission cross sections of Nd-doped solid-state laser materials. We have also presented numerical approximations of this model for our samples by a simple polynomial, which can be applicable within the temperature range from 15 degrees C to 350 degrees C. (C)2012 Optical Society of America