title: Mid-infrared spectroscopic properties and energy transfer of Er3+/Yb3+ co-doped bismuth germanate glass.
abstract: An Er3+/Yb3+ co-doped bismuth germanate glass is synthesized and analyzed. The radiative characteristics and mid-infrared spectroscopic properties are investigated under excitation of a conventional 980 nm laser diode. The prepared glass possesses higher spontaneous transition probability (68.82 s(-1)) and larger calculated emission cross-section (7.73×10(-21) cm2) corresponding to the 4I11/2→4I13/2 transition. The calculated energy migration coefficient (CDD) among Yb3+ ions is larger than the energy transfer coefficient (CDA) from Yb3+ to Er3+, indicating the energy transfer process assisted with energy migration. The excellent spectroscopic properties along with the outstanding thermal stability suggest that this glass may become an attractive host for developing solid state lasers operating in the mid-infrared range.
authors.affiliation: Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, PR China. zhaogy135@126.com
authors.forename: Guoying
authors.initials: G
authors.lastname: Zhao
authors.forename: Shikai
authors.initials: S
authors.lastname: Wang
authors.forename: Huiyan
authors.initials: H
authors.lastname: Fan
authors.forename: Lili
authors.initials: L
authors.lastname: Hu
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004735:Energy Transfer; D004871:Erbium / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D015018:Ytterbium / Q000737:chemistry*
chemical_list: D005857:Germanium; C042364:bismuth germanium oxide; D004871:Erbium; D015018:Ytterbium; D001729:Bismuth