کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1672334 | 1518086 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth and fluorescence measurements of neodymium: Yttrium Aluminum Garnet, neodymium fluoride, Ti:Sapphire, ytterbium fluoride and mixture of neodymium fluoride with ytterbium fluoride thin films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The main objective of the present work was to fabricate and find evidence of fluorescence in the optical films of some well established laser materials and as well as some other new materials have also been probed. Materials such as Nd:Yttrium Aluminum Garnet (Nd:YAG), Ti:Sapphire, NdF3 and YbF3 were deposited on BK7 type optical glass, fused silica (Suprasil), Sapphire and YAG substrates by conventional electron beam evaporation processes. In case of Nd:YAG, the films were prepared by using pure single crystals of Nd:YAG as evaporation material. Samples with higher Nd content were also prepared in order to enhance the absorption in the film at the pump wavelength. A theoretical analysis for the lasing action in the Nd:YAG film has also been made and parameters like gain, threshold population inversion, threshold power etc. have been calculated for the realisation of laser action in thin films. In case of Ti:Sapphire, the films were prepared by an Ion Beam Sputtering process. It has been demonstrated that fluorescence can be observed in Electron-beam deposited films of Nd:YAG and NdF3 when pumped with a diode laser at 802Â nm. The maximum peak emission was observed at 1066Â nm in case of Nd:YAG and 1046Â nm in case of NdF3. A Ti:Sapphire sample has also been excited using an Nd:YAG laser at 532Â nm. Here a broad band fluorescence spectrum was observed. Films of YbF3 and YbF3Â +Â NdF3 (co-deposition) prepared by Electron Beam Evaporation were also studied.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 515, Issues 20â21, 31 July 2007, Pages 7958-7965
Journal: Thin Solid Films - Volume 515, Issues 20â21, 31 July 2007, Pages 7958-7965
نویسندگان
S.M. Javed Akhtar, Marc Lappschies, Detlev Ristau, M. Ashraf, M. Ahmed,