Auger upconversion energy transfer losses and efficient 1.06 μm laser emission in Nd3+ doped fluoroindogallate glass
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- de Camargo, A., Jacinto, C., Catunda, T. et al. Appl. Phys. B (2006) 83: 565. doi:10.1007/s00340-006-2154-9
In addition to efficient continuous wave laser action at 1.06 μm (4F3/2→4I11/2 transition), with a slope efficiency 30% and 30 mW pump power threshold, this work presents a throughout study of the spectroscopic, and thermo-optical properties of a 2.0 mol % Nd3+ doped fluoroindogallate glass. The characterization of the sample using the pump probe experimental technique indicated the presence of two broad excited state absorption bands from 0.94 to 1.05 μm (4F3/2→2D3/2, 2G9/2, 4G11/2, 2K15/2) and from 1.16 to 1.42 μm (4F3/2→4G9/2, 4G7/2, 2K13/2), found not to interfere with the stimulated emission at 1.06 μm, with a peak cross section value σSE = 2.55×10-21 cm2 and a full width at half maximum of 22 nm. Thermal lens measurements were performed to quantify the Auger upconversion parameter (γ=(1.26±0.09)×10-16 cm3/s) and evaluate the thermal loading in the sample in comparison to other commercial glasses.