Upconversion pumped thulium fiber amplifier and laser operating at 790 to 830 nm

摘要

The present invention is a fluorozirconate laser host doped with a suffict amount of Tm.sup.3+ ions to permit significant emission at a wavelength between about 790 nm and about 830 nm when pumped at a wavelength or wavelengths to excite Tm.sup.3+ ions from the .sup.3 H.sub. 6 ground state to the .sup.3 F.sub.4 excited state, and then from the . sup.3 F.sub.4 excited state to the .sup.3 H.sub.4 excited state.