کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7906725 | 1510755 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Excited-state absorption and fluorescence dynamics of Er3+:KY3F10
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report here on a complete investigation of the excited-state absorption and fluorescence dynamics of Er3+ doped KY3F10 single crystals versus dopant concentrations and optical excitation conditions. Radiative and effective (including non-radiative relaxations) emission lifetimes and branching ratios are determined from a Judd-Ofelt analysis of the absorption spectra and via specific fluorescence experiments using wavelength selective laser excitations. Excited-state absorption and emission spectra are registered within seven spectral domains, i.e. 560â¯nm, 650â¯nm, 710â¯nm, 810â¯nm, 970â¯nm, 1550â¯nm and 2750â¯nm. A maximum gain cross-section of 0.93â¯Ãâ¯10â21â¯cm2 is determined at the potential laser wavelength of 2.801â¯Î¼m for a population ratio of 0.48. Saturation of fluorescence intensities and variations of population ratios versus pumping rates are registered and confronted with a rate equation model to derive the rates of the most important up-conversion and cross-relaxation energy transfers occurring at high dopant concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 79, May 2018, Pages 279-288
Journal: Optical Materials - Volume 79, May 2018, Pages 279-288
نویسندگان
C. Labbé, J.L. Doualan, R. Moncorgé, A. Braud, P. Camy,