铒离子浓度对掺Er<SUP>3+</SUP>碲酸盐玻璃的Judd-Ofelt理论参数的影响

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Abstract Er³⁺-doped tellurite glasses with four different concentrations were fabricated, and the oscillator strength of Er³⁺ in the tellurite glasses were calculated through the absorption spectra of the glasses. The Judd-Ofelt intensity parameter Ω_i,spontaneous transition probability A,fluorescence branching ratio β,and radiative lifetime τ_rad of Er³⁺ were calculated on the basis of Judd-Ofelt theory，and the effect of the erbium ion concentration on the above optical parameters was also discussed. The fluorescence spectra of Er³⁺: ⁴I_13/2→⁴I_15/2 transition and the lifetime of Er³⁺: ⁴I_13/2 level of the samples were measured. The stimulated emission cross-section of ⁴I_13/2→⁴I_15/2 transition of the samples was finally calculated by using McCumber theory. The results show that with the increase in the Er³⁺ concentration, the oscillator strength and spontaneous transition probability A of Er³⁺ increase, while the fluorescence branching ratio β of Er³⁺ shows little difference. The stimulated emission cross-section of Er³⁺: ⁴I_13/2→⁴I_15/2 transition of the samples changes slightly with the increase in the Er³⁺ concentration. All the fluorescence effective line widths for the four different Er³⁺ concentration samples are nearly 50 nm.

Key words：Er³⁺ ion;Judd-Ofelt theory;Spectroscopic properties;Tellurite glass;Rare earths

Received: 2004-12-28 Accepted: 2005-05-25

ZTFLH:

TQ171

Corresponding Authors: ZHOU Gang

Cite this article:

ZHOU Gang,DAI Shi-xun,YU Chun-lei, et al. Influence of Erbium Ion Concentration on Judd-Ofelt Parameters of Er³⁺-Doped Tellurite Glass [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(03): 403-407.

URL:

https://www.gpxygpfx.com/EN/Y2006/V26/I03/403

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