標題: | 添加Al3+或Y3+離子對鉺參雜氧化矽或氧化鈦材料的螢光特性與結構之影響 Effects of Al3+/Y3+ ions on the Structure and Fluorescence Properties of Er3+-doped Silica/Titania |
作者: | 黎嘉豪 Li Chia-hou 陳三元 Chen San-yuan 材料科學與工程學系 |
關鍵字: | 螢光;鉺;氧化矽;Fluorescence;Erbium;Silica |
公開日期: | 1999 |
摘要: | 鉺參雜平面光波導放大器是光纖通訊中極為重要的元件,為了因應其小體積、高效率的要求,提高其中的鉺離子參雜量是必須的。由於高的鉺離子參雜量勢必會遇到鉺離子形成聚集的問題,所以避免聚集的形成成為首要考量,而其他離子(如Al3+離子、P3+離子、Yb3+離子)的添加是十分有效的解決方法之一。本實驗將Al3+離子及Y3+離子添加在鉺離子參雜的氧化矽或氧化鈦基材中,並對不同添加量與熱處理溫度的影響及其機制加以研究。實驗結果顯示Al3+離子及Y3+離子的添加均對螢光強度的提昇有良好的效果,Y3+離子添加的效應尤其顯著。我們將Al3+離子的效果歸功於其會創造出較多的non-bridging oxygens,而Y3+離子的效果則是因ErxY2-xO3或Y2-xErxSi2O7微晶的形成。另外由Al3+離子添加在鉺參雜二氧化鈦中的結果,我們認為Al3+離子與Er3+離子的添加有幫助Anatase相轉變成Rutile相的效應 Erbium-doped planar waveguide amplifier is a very important device in optics-communication systems. Increasing doping levels of Er3+ ions is necessary for the development of minifarized volume and high efficiency. Since Er3+ ions will form clusters as increasing doping levels of Er3+ ions, annihilation of clusters is the primary focus of this research. In this experiment, Al3+ ions and Y3+ ions were used on Er3+-co-doped silica/titania materials. The influences of doping levels and heat treatment temperatures on the phase evolution and photoluminescence properties of Al3+/Y3+-Er3+ co-doped silica/tiania would be investigated. Results showed that the co-doping of either Al3+ ions or Y3+ ions would increase intensities of fluorescence but the latter would perform better. The effects of Al3+ ions on the photoluminescence were attributed to the creations of non-bridging oxygens(NNOs). Meanwhile, it was found that the formations of ErxY2-xO3 or Y2-xErxSi2O7 also would inhibit the formations of clusters. In addition, the Al3+-doping in titania would enhance the transformation of Anatase phase to Rutile phase. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT880159035 http://hdl.handle.net/11536/65310 |
顯示於類別: | 畢業論文 |