∼2 μm emission properties and non-radiative processes of Tm{sup 3+} in germanate glass
- Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
In this paper, 80GeO{sub 2}-8Ga{sub 2}O{sub 3}-10BaO-2Nb{sub 2}O{sub 5}-6PbO (in mol%) glass samples with different Tm{sub 2}O{sub 3} concentrations (0, 0.5, 0.75, 1, 1.25, and 1.5 mol. %) were prepared by traditional melt-quenching method. According to the measurement of thermal properties of the host glass, the glass transition temperature is 596.7 °C and no crystallization peak is observed. Judd–Ofelt parameters Ω{sub t} (t = 2, 4, 6) and fluorescent lifetimes were obtained by Judd-Ofelt theory. The similar values of Judd–Ofelt parameters and the full-width at half-maximums of ∼1800 nm indicate the local environment of Tm{sup 3+} changes little with increment of Tm{sub 2}O{sub 3} concentrations. Maximum stimulated emission cross-section of ∼1800 nm is 6.22 × 10{sup −21} cm{sup 2} as calculated by Fuchtbauer–Ladenburg formula. Energy migration among Tm{sup 3+} ions was analyzed by the extended overlap integral method. The non-radiative transition rates between mainly energy levels of Tm{sup 3+} were calculated. Non-radiative transition rate of {sup 3}F{sub 4} energy level caused by OH was analyzed by rate equation and deduced by fitting the fluorescence decay curve.
- OSTI ID:
- 22402578
- Journal Information:
- Journal of Applied Physics, Vol. 116, Issue 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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