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研究生:王耀常
論文名稱:高頻馬赫任德光調變器的設計與改善
論文名稱(外文):Design and improvement of the broadband mach-zehnder optical modulator
指導教授:林克瀛林克瀛引用關係祁甡祁甡引用關係
學位類別:碩士
校院名稱:國立清華大學
系所名稱:物理學系
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
中文關鍵詞:馬赫任德光波導光調變器鈮酸鋰電光效應脊狀結構有限元素法正弦形光波導行波式電極
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本論文的研究目的,在於了解馬赫任德電光調變器的工作原理,及各結構對其特性的影響,以期能對調變器的效能作一完整的模擬,而建構一有用的設計方法,並提出一最佳化結構。此外,並在基本的結構中加入漸細結構(taper structure),以期進一步改善其效能,以達到規格的要求。
在第一章緒論中,我們先對光通訊的發展作一介紹,接著說明外部調變器在光通訊中扮演的角色、重要性,以及其改良過程,最後對高頻調變器的結構及各結構的功能作一整理。
接著再第二章中,將對調變器的相關原理及工作機制作一介紹,以為接下來進行相關模擬的基礎。
在第三章之中,我們開始建構馬赫任德光調變器的模擬方法;主要是利用準靜態有限元素法,以及BPM CAD來進行模擬,最後設計出一最佳化參數,並對該調變器的效能進行估計及探討。
再第四章中,我們針對第三章不足的地方,提出改良設計。接著對改良後的調變器進行模擬,由模擬結果與第三章中的調變器表現作比較,探討此改良結構對調變器效能的影響。
最後在第五章中,我們將對本篇論文的研究及結果作一個總結。
第一章 緒論
1-1 光通訊與電光調變器的簡介
1-2 研究目的
1-3 論文內容簡介
第二章 行波式光調變器的工作原理
2-1 鈮酸鋰晶體的電光效應
2-2 電光調變器的調變機制
2-2-1 相位電光調變器
2-2-2 馬赫任德光強度調變器
2-3 行波式調變器的調變頻寬
第三章 調變器的設計
3-1 分析的模型及方法
3-1-1 建立分析模型
3-1-2 利用有限元素法進行調變器電極特性計算的方法
3-2 馬赫任德電光調變器的設計
3-2-1 調變器電極厚度、緩衝層厚度及脊狀結構高度的設計
3-2-2 馬赫任德光波導的設計
3-2-3 馬赫任德電光調變器的表現
第四章 馬赫任德電光調變器的改良
第五章 結論
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