title: Investigation of mid-infrared emission characteristics and energy transfer dynamics in Er(3+) doped oxyfluoride tellurite glass.
abstract: Er(3+) doped oxyfluoride tellurite glasses have been prepared. Three Judd-Ofelt parameters Ωt (t=2, 4, 6) and radiative properties are calculated for prepared glasses. Emission characteristics are analyzed and it is found that prepared glasses possess larger calculated predicted spontaneous transition probability (39.97 s(-1)), emission cross section σem (10.18 × 10(-21)cm(2)) and σem × Δλeff (945.32 × 10(-28)cm(3)), corresponding to the 2.7 μm emission of Er(3+): (4)I11/2→ (4)I13/2 transition. The results suggest that the prepared glasses might be appropriate optical material for mid-infrared laser application. Moreover, rate equation analysis which is rarely used in bulk glass has been carried out to explain the relationship between emission intensity and Er(3+) concentration. The calculation results show that with the increment of Er(3+) concentration, the energy transfer up-conversion rate of (4)I13/2 state increases while the rate of (4)I11/2 state reduces, resulting in the change of 2.7 μm emission.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Fangze
authors.initials: F
authors.lastname: Chen
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wei
authors.affiliation: Institute of Optoelectronic Technology, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Xufeng
authors.initials: X
authors.lastname: Jing
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Tian
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Junjie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, PR China.
authors.forename: Shiqing
authors.initials: S
authors.lastname: Xu