title: 2.7 μm emission properties of Er3+ doped tungsten-tellurite glass sensitized by Yb3+ ions.
abstract: With a 980 nm laser diode (LD) pumped, the sensitized effect of Yb(3+) ions on 2.7 μm emission properties and energy transfer mechanism in Yb(3+)/Er(3+) co-doped tungsten-tellurite glass were investigated in present paper. Based on absorption spectra, Judd-Ofelt parameters and radiative transition probabilities were calculated and analyzed. The emission spectra were tested and the optimized concentration ratio of Yb(3+) to Er(3+) ions was found to be 3:0.5 with a largest calculated emission cross-section (6.05×10(-21) cm(2)) corresponding to Er(3+):(4)I11/2→(4)I13/2 transition. When the concentration ratio of Yb(3+) to Er(3+) ions was 4:0.5, 1.5 μm and 2.7 μm emission decreased while up-conversion increased. The decreased 1.5 μm and 2.7 μm emission were induced by the saturation of Er(3+):(4)I13/2 level. In brief, the advantageous spectroscopic characteristics indicated that Yb(3+)/Er(3+) co-doped tungsten-tellurite glass may be a promising candidate for application of 2.7 μm emission.
authors.affiliation: Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Guo
authors.forename: Yaoyao
authors.initials: Y
authors.lastname: Ma
authors.forename: Feifei
authors.initials: F
authors.lastname: Huang
authors.forename: Yapei
authors.initials: Y
authors.lastname: Peng
authors.forename: Liyan
authors.initials: L
authors.lastname: Zhang
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000042:Absorption; D004871:Erbium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007477:Ions; D013050:Spectrometry, Fluorescence; D013691:Tellurium / Q000737:chemistry*; D013816:Thermodynamics; D014414:Tungsten / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D007477:Ions; D004871:Erbium; D015018:Ytterbium; D013691:Tellurium; D014414:Tungsten