کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1493461 1510784 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Energy transfer and energy level decay processes of Er3+ in water-free tellurite glass
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Energy transfer and energy level decay processes of Er3+ in water-free tellurite glass
چکیده انگلیسی


• The first tellurite glass fabricated with near zero water content.
• First spectroscopy measurements of a tellurite glass with near zero water content.
• Calculations show low threshold for oscillation on the 2.8 μm transition of Er using this glass.
• First study showing that 3 μm emission from a tellurite glass may be possible.

This report details the fundamental spectroscopic properties of a new class of water-free tellurite glasses studied for future applications in mid-infrared light generation. The fundamental excited state decay processes relating to the 4I11/2 → 4I13/2 transition in singly Er3+-doped Tellurium Zinc Lanthanum glass have been investigated using time-resolved fluorescence spectroscopy. The excited state dynamics was analyzed for Er2O3 concentrations between 0.5 mol% and 4 mol%. Selective laser excitation of the 4I11/2 energy level at 972 nm and selective laser excitation of the 4I13/2 energy level at 1485 nm has established that in a similar way to other Er3+-doped glasses, a strong energy-transfer upconversion by way of a dipole–dipole interaction between two excited erbium ions in the 4I13/2 level populates the 4I11/2 upper laser level of the 3 μm transition. The 4I13/2 and 4I11/2 energy levels emitted luminescence with peaks located at 1532 nm and 2734 nm respectively with luminescence efficiencies of 100% and 8% for the higher (4 mol.%) concentration sample. Results from numerical simulations showed that a population inversion is reached at a threshold pumping intensity of ∼57 kW cm−2 for a CW laser pump at 976 nm for [Er2O3] = 2 mol.%.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 50, Part B, December 2015, Pages 268–274
نویسندگان
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