Temperature dependence of optical properties in Nd/Cr:YAG materials

The energy transfer from Cr3+ to Nd3+ for Nd/Cr:YAG (Nd: 1.0%, Cr: 2.0%) materials was investigated by measuring the temperature dependences of fluorescence characteristics. The fluorescence intensity of Nd3+ increased with temperature owing to enhancement of the absorption coefficient of Cr3+. The energy transfer efficiency was constant from 77 to 450 K. The energy transfer time decreased with increasing temperature.