2-Mu M Fluorescence and Raman Spectra in High and Low Al(Po3)(3) Content Fluorophosphate Glasses Doped with Er-Tm-Ho

Thermal stability and 2-mu m fluorescence of high and low Al(PO3)(3) content of fluorophosphate glasses are investigated. Thermal stability of high Al(PO3)(3) content of fluorophosphate glass is better than low Al(PO3)(3) content of fluorophosphate glass. However, 2.04-mu m fluorescence intensity of high Al(PO3)(3) content of fluorophosphate glass is only 48.2, lower than low Al(PO3)(3) content of fluorophosphate glass. Raman spectroscopy is employed to investigate the difference in thermal stability and 2-mu m fluorescence. Moreover, fluorescence peak intensity ratios of 2.04 to 1.81 mu m and 2.04 to 1.57 mu m are calculated, which indicate that, Er-Tm-Ho doped fluorophosphate glasses are suitable materials in 2-mu m applications.