Preparation and Er3+:2.7 μm Mid-infrared Emission Properties of Novel Al2 O3-CaO-ZnO Glass
Mid-infrared fiber lasers operating at 3 μm bands have attracted considerable attention due to their potential ap-plications in medicine,environmental monitoring,military defense,etc.One of the key foundations to achieve 3 μm mid-in-frared fiber laser is the gain medium made by efficient and stable glass host materials with low phonon energy.In this study,novel Er3+-doped Al2O3-CaO-ZnO glasses were synthesized by melt-quenching method.Properties of thermodynamic,struc-ture,transmission wavelength range,and mid-infrared emission were studied by thermal analysis,Raman spectra,transmis-sion spectra,and photoluminescence spectra.The results showed that Al2O3-CaO-ZnO glasses possess a high glass transition temperature(～750℃),low phonon energy(～780 cm-1),and wide transmission wavelength range(0.5-5 μm).Besides,intense 2.7 μm emissions originating from Er3+:4I11/2→4I13/2 transition were observed in glass under 980 nm laser diode exci-tation.Our results indicate that Al2O3-CaO-ZnO glasses could be a potential host material for mid-infrared laser.
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