Room temperature CaGa2S4:Dy3+ laser action at 2.43 and 4.31 microns and211 KPb2I5:Dy3+ laser action at 2.43 microns

摘要

Applications such as remote sensing and countermeasures have driven the need for211u001emid-IR laser sources. This in turn has inspired the search for new low-phonon 211u001eenergy hosts since mid-IR luminescence in traditional oxide and fluoride hosts is 211u001equenched by non-radiative multiphonon relaxation. Sulfide(sup 2) and chloride 211u001ebased hosts have been studied in this pursuit since they are the denser 211u001ecounterparts to oxide and fluoride hosts, thereby possessing a naturally lower 211u001emaximum phonon frequency. The problem with these materials is that they typically 211u001ehave poor mechanical properties and are difficult to fabricate. Indeed, until 211u001enow, no moisture-resistant chloride laser host has been identified.