کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5461436 | 1516199 | 2017 | 41 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectroscopic investigations of Nd3+ doped gadolinium calcium silica borate glasses for the NIR emission at 1059Â nm
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spectroscopic investigations of Nd3+ doped gadolinium calcium silica borate glasses for the NIR emission at 1059Â nm Spectroscopic investigations of Nd3+ doped gadolinium calcium silica borate glasses for the NIR emission at 1059Â nm](/preview/png/5461436.png)
چکیده انگلیسی
The Nd3+-doped gadolinium calcium silica borate (BSGdCaNd) glasses of composition (55-x) B2O3 - 10 SiO2 - 25 Gd2O3 -10 CaO -x Nd2O3, where x = 0.0, 0.05, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %, have been prepared by conventional melt quenching technique and are characterized through structural, thermal, absorption, emission and decay time measurements. Based on the Judd-Ofelt intensity parameters and radiative properties were determined from the absorption spectrum. The emission spectra recorded for BSGdCaNd glasses gives three emission transitions 4F3/2 â 4I9/2 (903 nm), 4F3/2 â 4I11/2 (1059 nm) and 4F3/2 â 4I13/2 (1334 nm) for which effective bandwidths (Îλeff) and stimulated emission cross-section (Ï(λp)) are evaluated. Branching ratios (βR) measured for BSGdCaNd0.5 glass show that 4F3/2 â 4I11/2 transition is quite suitable for lasing applications. The intensity of emission spectra increases with increase in the concentration of Nd3+ ion up to 1.0 mol% and beyond that concentration, quenching is observed. The decay from 4F3/2 level is found to be non-exponential nature for concentrations of Nd3+ ions. The non-exponential curve has been fitted to the Inokuti-Hirayama model to understand the nature of energy transfer process. Hence, the high emission cross-section (1.39 Ã 10â20 cm2), branching ratio (0.58) and long lifetime (342 μs) indicate that the BSGdCaNd0.5 glass system could be considered as a good candidate for strong NIR lasers at 1059 nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 695, 25 February 2017, Pages 590-598
Journal: Journal of Alloys and Compounds - Volume 695, 25 February 2017, Pages 590-598
نویسندگان
C.R. Kesavulu, H.J. Kim, S.W. Lee, J. Kaewkhao, N. Wantana, E. Kaewnuam, S. Kothan, S. Kaewjaeng,