Erbium fiber laser-pumped continuous-wave microchip Cr~(2+):ZnS and Cr~(2+):ZnSe lasers

摘要

Efficient continuous-wave (cw) lasing of Cr~(2+):ZnS and Cr~(2+):ZnSe crystals in external hemispherical cavities and in a microchip configuration under Er-fiber-laser pumping at room temperature are reported. The key result is what is believed to be the first successful demonstration of cw Cr~(2+):ZnS and Cr~(2+):ZnSe microchip lasers with maximum output powers of 63 and 100 mW at 2320 and 2520 nm, with slope efficiencies of 53% and 20%, respectively.