title: The effect of La₂O₃ in Tm³⁺-doped germanate-tellurite glasses for ~2 μm emission.
abstract: A germanate-tellurite glass (GeO2-TeO₂-K₂O-Nb₂O₅-La₂O₃) with thulium doping has been investigated for application as a laser material around 2.0 μm regions. Under the 808 nm laser diode pumped, intense 1.8 μm emission is obtained. Based on the absorption spectra, radiative properties are predicted using Judd-Ofelt theory. The maximum value of emission cross-section of Tm(3+) around 1.8 μm can reach 1.46 × 10(-20) cm(2), which indicated that the germanate-tellurite glass may provide high gain as a good medium for efficient 1.8 μm laser system.
authors.affiliation: 1] Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2] University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Ya-Pei
authors.initials: YP
authors.lastname: Peng
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: Xinqiang
authors.initials: X
authors.lastname: Yuan
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Zhejiang 310018, China.
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
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: Long
authors.initials: L
authors.lastname: Zhang