New Mid-IR Lasers Based on Rare-Earth-Doped Sulfide and Chloride Materials

Abstract

Laser results are summarized for the low-phonon hosts KF%&15 and CaGa&. Radiative quantum efficiencies were determined in KPb2C1S:Dy3+ directly from emission spectra in order to accurately determine its long-wavelength potential. The results indicate that room-temperature laser action should be possible to near 9 pm in this host.