Mechanisms and Concentration Dependence of Upconversion Fluorescence in Er<sup>3+</sup> and Tm<sup>3+</sup> Codoped Tellurite Glasses

Chin. Phys. Lett.

2004, Vol. 21

Issue (12): 2507-2510 DOI:

Original Articles

Mechanisms and Concentration Dependence of Upconversion Fluorescence in Er³⁺ and Tm³⁺ Codoped Tellurite Glasses

SHEN Xiang;NIE Qiu-Hua;XU Tie-Feng;PENG Tao;GAO Yuan

Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211

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SHEN Xiang, NIE Qiu-Hua, XU Tie-Feng et al 2004 Chin. Phys. Lett. 21 2507-2510

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Abstract We investigate the upconversion luminescence of Er³⁺ and Tm³⁺ codoped tellurite glasses under both the 975 and 800nm excitations. By Tm³⁺ codoping, the Er³⁺ green emission corresponding to the (⁴S_3/2, ²H_11/2) → ⁴I_15/2 transitions was quenched, while the red emission corresponding to the ⁴ F_9/2 → ⁴I_15/2 transition was selectively sensitized. The red emission has a maximum in the range where the ratio of Er³⁺- to Tm³⁺-content is about two and its fluorescence intensity becomes 1.5 and 5 times larger at the maximum than those in the absence of Tm³⁺ for 975 and 800nm excitations, respectively. The results were explained considering the influence of energy transfers between these two active ions.

Keywords: 74.25.Gz 42.70.Hj 73.61.Jc 76.30.Kg

Published: 01 December 2004

PACS:	74.25.Gz	(Optical properties)
	42.70.Hj	(Laser materials)
	73.61.Jc	(Amorphous semiconductors; glasses)
	76.30.Kg	(Rare-earth ions and impurities)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2004/V21/I12/02507

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	SHEN Xiang
	NIE Qiu-Hua
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