臺灣博碩士論文加值系統

在本研究中，我們利用軟式微影技術和聚二甲基矽氧烷（PDMS）製作了一種具布拉格光柵的單模D型光纖濾波器。首先，我們通過研磨方法將單模光纖加工成D型光纖結構。接著，採用全像干涉微影技術在玻璃基板上製作布拉格光柵母片，並利用軟式微影技術將光柵轉印至PDMS材料上，製成可重複使用的布拉格光柵母模。然後，我們將該母模轉印到折射率為1.508的聚合物材料上，製作出布拉格光柵，並將其覆蓋於單模D型光纖上，完成具濾波效果的單模D型光纖濾波器。光譜分析結果顯示，在波長1542.9 nm處出現反射峰，證明該製程可成功製作出性能良好的濾波器。我們使用兩種折射率不同的聚合物模片進行測試，結果表明，每0.001的折射率變化會導致波長發生1.175 nm的變化，顯示出對於微小折射率變化的高靈敏度。最後，我們使用COMSOL軟體對三種不同折射率(1.508, 1.512, 1.5408)及多種光柵寬度進行模擬分析，找出了最有可能匹配實際D型光纖模態的有效模態，並計算和分析了相應的反射頻譜。

In this study, we developed a single-mode D-shaped fiber optic filter with Bragg gratings using soft lithography techniques and Polydimethylsiloxane (PDMS). First, a single-mode fiber was processed into a D-shaped fiber structure through grinding. Then, holographic interference lithography was employed to fabricate a Bragg grating master on a glass substrate, and soft lithography was used to transfer the grating onto PDMS, creating a reusable Bragg grating master mold. This master mold was further transferred onto a polymer material with a refractive index of 1.508 to form Bragg gratings, which were then applied to the surface of a single-mode D-shaped fiber to complete the filter. Spectral analysis showed a reflection wavelength at 1542.9 nm, confirming the effectiveness of this fabrication process in producing a high-quality filter. Using two different polymer plates with varying refractive indices, we found that a change of 0.001 in refractive index resulted in a wavelength shift of 1.175 nm, indicating high sensitivity to minor refractive index changes. Finally, we conducted simulations using COMSOL software to analyze grating structures with three different refractive indices (1.508, 1.512, and 1.5408) and various widths, identifying the effective modes most likely to match the actual D-shaped fiber modes and calculating the corresponding reflection spectra.

中文摘要......i
英文摘要......ii
誌謝......iii
目錄......iv
圖目錄......v
第一章 緒論......1
1.1 研究背景......1
1.2 研究動機......1
1.3 研究方法......2
第二章 文獻探討......3
2.1 光纖通訊技術......3
2.1.1 光纖......3
2.1.2 光纖濾波器......4
2.2. 布拉格光柵......5
2.2.1 全像干涉微影技術......5
2.2.2 光束入射角度......5
第三章 研究內容與方法......6
3.1 D型光纖......6
3.2 D型光纖表面研磨......8
3.3 布拉格光柵聚合物膜片製作......14
第四章 實驗結果與討論......18
4.1 量測系統......18
4.2 反射頻譜量測......19
第五章 D型光纖模態之模擬與分析......20
5.1 有效模態之模擬與分析......20
5.1.1 折射率1.508的聚合物膜片......20
5.1.2 折射率1.512的聚合物膜片......23
5.1.3 折射率1.5408的聚合物膜片......25
5.1.4 計算反射頻譜......26
第六章 結論與未來方向......27
參考文獻......29
英文論文大綱......32

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