隨著光纖功能多樣化需求日益增加，光纖感測器、光纖放大器、光纖耦合器、光纖光柵等相繼出現，說明多功能光纖平台的研發就顯得非常重要。因此，我們想研究一種新的光纖製備方法，其主要目的為使更多材料或元件可同時存在於光纖中。為此我們決定使用sol-gel法製備光纖以達到於一條光纖中可以容納多種功能性的材料。首先，第一階段我們使用sol-gel法製備出光纖，並改善因sol-gel製備法所出現的氣泡問題。第二階段於膠體內加入熒光物質，使光纖可發出熒光，並確立建構光纖平台的方法。未來計畫加入不同材料，使光纖具備不同功能，更進一步為使光纖具備複數功能。
為使多種特定材料存在於一條光纖中，我們的製程方法需較現今之主流製程，如Modified chemical vapor deposition (MCVD)[1]、Outside Chemical Vapour Deposition(OVD)[2]等，具備更低的熱處理溫度，以避免材料受到破壞。因此我們選用sol-gel法製備光纖，此製程方法除製程溫度低外，亦可提供各種材料化學反應及物理混合的環境，因此可使光纖內同時具有多功能的可能性增加。
我們採用Polytetrafluoroethene (PTFE) tube做為光纖的纖衣，sol-gel法製備之膠體作為纖核。並且加入特定酯類使膠體於固化時產生網狀結構，可有效改善氣泡問題。另外，將熒光物質，硝酸釹及奈米氧化釹粒子，加入melting gel中。其中，摻雜奈米氧化钕粒子的melting gel樣品經photoluminescence (PL)檢測確認具備熒光特性，光纖樣品亦具備熒光特性，但樣品會出現明顯的因缺陷發光所產生的熒光信號。為改善這問題，我們對樣品進行超臨界流體(SCCO2)處理，該處理方法可改善樣品缺陷，進而改善因缺陷發光所產生的熒光信號。此外，我們對奈米氧化釹粒子進行改質，使其加入melting gel後，在降低背景吸收係數的同時，能保有明顯的三價钕吸收特性，增加波導增益大於損耗的可能性，使製備出雷射的可能性增加。
未來我們將嘗試於膠體中加入不同物質，並朝在光纖中加入複數物質之方向前進，以製備出具備不同功能乃至複數功能之光纖。亦可透過變動纖衣材料，製備多模和單模光纖。該種製程具備靈活性，可在結合不同材料後運用於光通訊上。

With emergence of the demand for functional fiber, there are many fiber appeared in succession, such as optical fiber sensors, optical amplifiers, fiber grating, etc. Those fibers indicate the development of optical fiber platform for multifunction will be inevitable. Therefore, we want to study a new fiber preparation for building an optical fiber which could make more materials or elements exist in one fiber.
We use sol-gel method to prepare the fiber. Comparing to the main processes, such as MCVD [1], and OVD [2], sol-gel process have lower heat treatment temperature, and provide a chemical reaction or physically mixed environment. Low temperature process could avoid to destroy chemical structure of some materials in the fiber and reduce the effect of heat treatment to the fiber elements.
We chose PTFE tube as cladding, melting gel as core. And we added esters to form network structure, it could reduce the number of gaps. Furthermore, we added fluorescent material, neodymium nitrate and neodymium oxide nano-particles into melting gel. The fluorescent of samples of neodymium oxide nano-particles in melting gel had been confirmed by PL. But some noise will be excited by defect. We could improve noise by SCCO2. Furthermore we modified the neodymium oxide nano-particles by methyldichlorosilane (DMDCS)[3]. The neodymium oxide nano-particles modified by DMDCS could reduce background absorption coefficient, and keep the absorption peaks of Nd3+. It made the gain greater than the loss be possible.
Our processes has elderly activity that could change composition of cladding and core to build functional fiber. And we will add different functional substance into melting gel to make mult-functional fibers possible. The fibers could be used in optical communications.

論文審定書 (中文) i
誌謝 ii
中文摘要 iii
Abstract v
目錄 vi
圖目錄 x
表目錄 xiii
第一章 序論 1
1.1 前言： 1
1.2 研究背景： 1
1.3 研究目的： 2
1.4 本文架構： 3
第二章 實驗設備與理論 4
2.1全反射 4
2.2數值孔徑 4
2.3多重態及能階 6
2.4放射流程 7
2.5回切法(Cutback) 9
2.6 Uv-vis穿透光譜量測(Transmission spectra) 10
2.7傅立葉轉換紅外光譜儀(Fourier-Transform Infrared Spectrometer) 11
2.8光激螢光(PL) 14
第三章 運用sol-gel法製備光纖 15
3.1 Melting gel製程與特性 15
3.1.1 melting gel膠體製程 15
3.1.2 melting gel特性 17
3.2 PTFE特性 19
3.3 melting gel光纖製程 20
3.3.1 melting gel固態光纖製程 20
3.3.2 melting gel液態光纖製程 21
3.3.3 melting gel光纖導光狀態比較 22
3.4 melting gel摻雜TEOS特性分析 23
3.4.1 melting gel摻雜TEOS之FTIR 23
3.4.2 纖核摻雜TEOS之光纖導光比較 25
3.5 melting gel摻雜鈦酸四丁酯特性分析 26
3.5.1 melting gel摻雜鈦酸四丁酯之FTIR 26
3.5.2纖核摻雜鈦酸四丁酯之光纖導光狀態比較 28
3.5.3 損耗量測分析 29
第四章 加入熒光物質 30
4.1 含硝酸釹膠體製程與材料特性 30
4.1.1含硝酸釹膠體製程 30
4.1.2含硝酸釹膠體特性 31
4.1.3 含硝酸釹膠體薄膜特性 33
4.2奈米氧化釹粒子膠體製程與材料特性 34
4.2.1 含奈米氧化釹膠體製程 34
4.2.2奈米氧化钕粒子膠體特性 34
4.2.3奈米氧化钕粒子薄膜特性 36
4.2.4 含奈米氧化釹固態光纖製程 38
4.2.5 摻雜奈米氧化釹粒子之光纖特性 39
第五章 超臨界流體(SCCO2) 41
5.1超臨界流體(SCCO2)簡介 41
5.2超臨界流體(SCCO2)處理流程與作用機制 43
5.2.1 SCCO2處理前備置流程 43
5.2.2 SCCO2處理流程 44
5.3經超臨界流體(SCCO2)處理後之樣品特性 45
5.3.1摻雜奈米氧化釹粒子之薄膜經SCCO2處理後的特性 45
5.3.2 摻雜奈米氧化釹粒子之光纖經SCCO2處理特性 46
第六章 奈米氧化钕粒子改質 47
6.1 改質奈米氧化釹溶液製程及特性 47
6.1.1奈米氧化釹粒子改質製程 47
6.1.2奈米氧化釹粒子改質後溶液特性 47
6.2 改質奈米氧化釹膠體製程及特性 48
6.2.1 奈米氧化釹粒子改質後膠體製程 48
6.2.2奈米氧化釹粒子改質後膠體特性 49
第七章 結論 52
參考文獻 54

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