کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5427886 | 1508654 | 2015 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Broadband 2 μm fluorescence and energy transfer evaluation in Ho3+/Er3+ codoped germanosilicate glass Broadband 2 μm fluorescence and energy transfer evaluation in Ho3+/Er3+ codoped germanosilicate glass](/preview/png/5427886.png)
- Ho3+/Er3+ codoped germanosilicate glasses were prepared.
- Spectral components of the 2 μm emission band were analyzed.
- Emission bandwidth, emission cross section and gain bandwidth were calculated.
- Energy transfer mechanism between Ho3+ and Er3+ ions was investigated.
- A rate equation was developed to elucidate 2 μm fluorescence behaviors.
This work reports the broadband 2 μm emission from Ho3+/Er3+ codoped germanosilicate glasses. Spectral components of the 2 μm emission band were analyzed and an equivalent model of four-level system was proposed to describe the 2 μm emission band. The results suggested that Ho3+/Er3+ codoped germanosilicate glass has high effective emission bandwidth (172 nm), large emission cross section (5.18Ã10â21 cm2) and gain bandwidth (891Ã10â28 cm3), which is a promising candidate for 2 μm laser and amplifier. In addition, energy transfer mechanism between Ho3+ and Er3+ ions was investigated based on the measured fluorescence spectra and decay curves of Er3+:4I11/2 and 4I13/2 levels. Energy transfer efficiency and microscopic parameters were calculated to evaluate the 2 μm fluorescence. Moreover, a rate equation model between Ho3+ and Er3+ ions was developed to elucidate 2 μm fluorescence behaviors. This work might provide useful guide to investigate fluorescence behavior and energy transfer mechanism of rare earth ions.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 161, August 2015, Pages 95-104