Rare earth-doped crystals and fibers have long been used as laser active media in the UV, VIS, and NIR spectral regions, but only a limited number of materials have shown laser emission beyond 3 μm, mainly because of the competition between radiative and non-radiative processes that limit the emission efficiency of these materials at long wavelengths. The ideal material must have excellent crystal quality, good thermo-physical parameters, wide transparency region in the mid infrared (MIR) and low phonon energies. Most of the research has been focused on fluorides, bromides and chlorides [1], but these compounds are often hygroscopic and/or the optical quality of grown samples (especially chlorides and bromides) is low both for the presence of scattering centers and contamination with quenching centers.
Mid-infrared spectroscopy of Pr3+:Lu2O3 single crystal
Toncelli A.
Primo
;Xu J.Secondo
;Tredicucci A.;Krankel C.Ultimo
2019-01-01
Abstract
Rare earth-doped crystals and fibers have long been used as laser active media in the UV, VIS, and NIR spectral regions, but only a limited number of materials have shown laser emission beyond 3 μm, mainly because of the competition between radiative and non-radiative processes that limit the emission efficiency of these materials at long wavelengths. The ideal material must have excellent crystal quality, good thermo-physical parameters, wide transparency region in the mid infrared (MIR) and low phonon energies. Most of the research has been focused on fluorides, bromides and chlorides [1], but these compounds are often hygroscopic and/or the optical quality of grown samples (especially chlorides and bromides) is low both for the presence of scattering centers and contamination with quenching centers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
