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研究生： 顏仲祺
Zhong-Qi Yan
論文名稱： 基於D形光纖之拉曼感測器模擬與設計
The design and simulation of D-fiber based Raman sensor
指導教授： 戴朝義
Chao-Yi Tai
口試委員:
學位類別： 碩士
Master
系所名稱： 理學院 - 光電科學與工程學系
Department of Optics and Photonics
論文出版年： 2013
畢業學年度： 101
語文別： 中文
論文頁數： 58
中文關鍵詞： D型光纖拉曼感測器 、拉曼散射 、增強係數 、研磨參數
外文關鍵詞： D-fiber based Raman sensor, Raman scattering, Enhancement factor, Polishing parameter
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    • 本論文設計D-fiber的結構，探討532nm的雷射光以SMF-28基模入射並經過此D-fiber結構以後，能夠讓收光系統收到最佳之拉曼訊號。模擬中首先藉由改變銀膜厚度，定出最佳鍍膜厚度為10nm，接著改變研磨深度，並且探討在不同包覆層材質的影響下，包含了空氣、水、熔融石英(Fused silica)、聚乙烯醇(Polyvinyl alcohol)增強係數的分布。最後我們也計算實際系統架設下，各種包覆層及研磨深度相對應拉曼訊號之大小，藉由這些計算結果來評估最佳化的拉曼訊號，以及系統之效率，並與實驗做對照，同時也提出未來之改進。

    In this study, we analyze the Raman signal from the platform constructed by D-fiber structure. In the simulation, we find the optimal thickness of 10nm which gives the highest Raman enhancement. Besides, the enhancement factor was calculated under various conditions such as the polished depth and the refractive index of the overclad materials. Finally, realistic power of requirement was estimated taking into account of the detection limit to our instruments.

    中文摘要..........................................................I Abstract.........................................................II 致謝.............................................................III 目錄..............................................................IV 圖目錄...........................................................VI 表目錄..........................................................VII 第一章：導論......................................................1 前言...............................................................1 1.1波導耦合結構....................................................2 1.2側磨光纖的發展..................................................3 1.2.1側磨光纖......................................................3 1.2.2光纖極化器....................................................4 1.2.3光纖感測器....................................................5 1.2.4光纖感測器的缺點..............................................6 1.3拉曼散射........................................................7 1.3.1拉曼訊號的增強機制............................................9 1.3.2拉曼訊號的量測...............................................10 1.3.3拉曼訊號與D-fiber平台的結合.................................11 1.4研究動機..................... .................................12 1.5論文架構.......................................................13 第二章：原理及研究方法.........................................14 前言..............................................................14 2.1表面電漿理論...................................................14 2.1.1單介面之表面電漿共振.........................................15 2.1.2色散關係.....................................................16 2.1.3 介電質-金屬-介電質結構.......................................18 2.2 光束傳遞法BPM.................................................19 2.3 Lorentz-Drude Model............................................22 2.4增強係數........................................................24 第三章：模擬之設計及參數..................................26 第四章：結果與討論........................................36 4.1入射場之場型...................................................36 4.2金屬厚度對於D-fiber之影響.....................................37 4.3研磨深度對D-fiber之影響.......................................39 4.4系統架設的評估...............................................42 4.5表面覆蓋層材質對於D-fiber之影響................................46 第五章：結論及未來展望.........................................48 參考文獻...........................................................49

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