∼2 μm emission properties and non-radiative processes of Tm{sup 3+} in germanate glass

Journal Article · Fri Nov 07 04:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4900534· OSTI ID:22402578

Gao, Song; Liu, Xueqiang; Fan, Xiaokang; Li, Xia ^[1]; Xue, Tianfeng; Li, Kefeng; Liao, Meisong; Hu, Lili ^[1]

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1. 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, Journal Name: Journal of Applied Physics Journal Issue: 17 Vol. 116; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CROSS SECTIONS
FLUORESCENCE
GERMANATES
GLASS
REACTION KINETICS
STIMULATED EMISSION
THULIUM IONS
THULIUM OXIDES
TRANSITION TEMPERATURE