Intense mid-infrared emission at 3.9 mu m in Ho3+-doped ZBYA glasses for potential use as a fiber laser

摘要

Intense mid-infrared emission at 3.9 mu m in Ho3+-doped ZBYA glasses with direct upper laser level (Ho3+ : I-5(5)) pumping at a wavelength of 888 nm is reported for the first time, to the best of our knowledge. Spectroscopic parameters were determined using the Judd-Ofelt theory and the measured absorption spectrum. The maximum emission cross section of the Ho3+-doped ZBYA glass is estimated to be 2.7 x 10(-21) cm(2) at 3906 nm. Additionally, fluorescence spectra and lifetimes of ZBYA glasses with different Ho3+ ion doping concentrations were measured. The results provide theoretical and experimental basis for better selection of rare-earth-doped matrix glasses to achieve a fluorescence output centered on a wavelength of 3.9 mu m. (C) 2020 Optical Society of America