کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9830246 | 1524505 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers](/preview/png/9830246.png)
چکیده انگلیسی
We have demonstrated the use of laser scanning confocal microscope for mapping the refractive index as well as Cr3+ and Cr4+ fluorescence in Cr:YAG crystal fibers with 1 μm spatial resolution. The corresponding sensitivities for Cr3+ and Cr4+ fluorescence intensities are 1.6Ã1017/cm3 and 7.5Ã1015/cm3, respectively. The share of Cr4+ ions in the total Cr concentration is found to be proportional to the ratio of Ca to Cr concentrations. However, only less than 1% of the Ca2+ ions become active in charge compensation. The concentration of Cr4+ ions is higher near the center of the crystal fiber when the core diameter is less than 300 μm. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller than 500 μm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 274, Issues 3â4, 1 February 2005, Pages 522-529
Journal: Journal of Crystal Growth - Volume 274, Issues 3â4, 1 February 2005, Pages 522-529
نویسندگان
Jian-Cheng Chen, Chia-Yao Lo, Kuang-Yao Huang, Fu-Jen Kao, Shih-Yu Tu, Sheng-Lung Huang,