title: Pr3+-sensitized Er3+-doped bismuthate glass for generating high inversion rates at 2.7 µm wavelength.
abstract: With a 980 nm laser diode pumping, the 2.7 µm emission and energy transfer processes of Er3+/Pr3+ codoped germanium-gallium-bismuthate glasses have been investigated. For Er3+ (1 mol. %) and Pr3+ (1 mol. %) molar concentrations, an intense 2.7 µm emission was obtained based on the high excited-state absorption of Er3+ ions and energy transfer (ET) between Er3+ and Pr3+ ions codopant (ET). The intrinsic lifetime of Er3+:4I(13/2) level is quenched effectively (from 6.85 ms down to 0.24 ms) and the population inversions between Er3+:4I(11/2) and 4I(13/2) levels are enhanced to achieve a four-level energy system at 2.7 µm.
authors: Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
authors: Yanyan
authors: Y
authors: Guo
authors: Ying
authors: Y
authors: Tian
authors: Liyan
authors: L
authors: Zhang
authors: Lili
authors: L
authors: Hu
authors: Nan-Kuang
authors: NK
authors: Chen
authors: Junjie
authors: J
authors: Zhang
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004871:Erbium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007834:Lasers; D008422:Materials Testing; D011221:Praseodymium / Q000737:chemistry*
chemical_list: D004871:Erbium; D011221:Praseodymium; D001729:Bismuth