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