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研究生:魏邦安
研究生(外文):Bang-An Wei
論文名稱:光子晶體極化保持光纖之研究
論文名稱(外文):A Study of Polarization Maintaining Photonic Crystal Fiber
指導教授:徐瑞明徐瑞明引用關係
指導教授(外文):Jui-Ming Hsu
學位類別:碩士
校院名稱:國立聯合大學
系所名稱:光電工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:98
語文別:中文
論文頁數:47
中文關鍵詞:平面波展開法光子晶體光子晶體光纖極化保持偏振模態色散
外文關鍵詞:Plane wave expansion methodphotonic crystalphotonic crystal fiberpolarization maintainingPolarization mode dispersion
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光子晶體是目前一個很熱門的領域,應用也非常的廣泛,光子晶體光纖就是其中一個很實用的例子。本論文使用平面波展開法分析介質導波型光子晶體光纖,並且刻意破壞光纖中的週期結構,藉此提高光纖中的雙折射來達到極化保持的效果。首先藉由兩種目前已經可以實際製作出來的光子晶體極化保持光纖進行分析,以此來了解結構的變化對雙折射的影響,綜合分析的結果找出一組光纖的結構參數,不但在製作以及耦合方面更為簡易,在波長為1.55μm時雙折射可達10×10-3左右。為了嘗試進一步的提高雙折射,使用了填液的方式設計了一種新結構,雙折射率極大值甚至可高達17×10-3,這是目前的極化保持光纖無法達到的。最後我們採用上述的結構,發現波長在特定範圍時,我們可以把極化保持光纖作為一偏振器來使用。
In this thesis we use plane wave expansion method to analyze some structure of index-guiding photonic crystal fiber. To improve polarization-maintaining effect and enhance the birefringence value in a fiber, we destroy the periodicity of a fiber structure deliberately. We investigate two kinds of polarization-maintaining photonic crystal fibers that can be realized, in order to study what influence does the change of the structure has to birefringence. Subsequently, we design a polarization-maintaining photonic crystal fiber structure. In our estimation, the fiber has a birefringence of about 10×10-3 at a wavelength of 1.55μm. Furthermore, it is easier to fabricate and easier to operate light coupling.
In order to pursue higher value of birefringence, we study and design a structure of polarization maintaining photonic crystal fiber based on liquid-filled technology. This structure considerably enhance the birefringence, the maximum value of birefringence can be up to 17×10-3, which is much higher than the birefringence of polarization-maintaining fiber in the present day. Finally, we restrict the wavelength of incident light in a specific range, then the polarization-maintaining photonic crystal fiber mentioned above can be regarded as a polarizer.
致謝
摘要
圖表目錄
第一章緒論
1-1前言
1-2光子晶體介紹
1-3光子晶體光纖簡介
第二章光子晶體的基本原理
2-1前言
2-2波動方程式
2-3晶格與倒晶格
2-4布洛赫定理
2-5布理淵區
2-6光子晶體能帶結構
第三章數值分析方法
3-1前言
3-2平面波展開法
3-2-1三維空間中的平面波展開法
3-2-2結論
3-2-3二維空間中的平面波展開法
3-3超晶胞
第四章極化保持光子晶體光纖
4-1前言
4-2雙折射效應
4-3模擬方法
4-4第一種結構
4-4-1增加小氣孔對雙折射率曲線的變化
4-4-2改變孔洞間距對雙折射率曲線的變化
4-5第二種結構
4-6第三種結構
第五章結論
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