Efficiency and Threshold Analysis of Resonantly Diode-Laser-Pumped 1.6-micrometers Er:YAG Laser

Abstract : Resonant diode pumping of the 1.6-micrometer Er3+(1%):YAG laser is reported with the absorbed photon conversion efficiency of 26%. Fluorescence study indicates that upconversion is a dominant mechanism affecting the solid-state laser threshold.