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論文名稱 Title |
SOI漸變式非對稱波導定向耦合極化分光器 Silicon-on-Insulator Polarization Beam Splitter Based on a Taper Asymmetrical Directional Coupler |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
75 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2012-07-10 |
繳交日期 Date of Submission |
2012-07-25 |
關鍵字 Keywords |
定向耦合器、積體光學、平面光波導、極化分光器、silicon on insulator (SOI)、漸變式波導 planar lightwave circuit (PLC), silicon on insulator (SOI), directional coupler, tapered waveguide, polarization beam splitter (PBS), integrated optics |
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統計 Statistics |
本論文已被瀏覽 5742 次,被下載 1253 次 The thesis/dissertation has been browsed 5742 times, has been downloaded 1253 times. |
中文摘要 |
在積體光路的設計與運作中,極化的特性限制了整個光學系統的運作,一個常用的解決方法,就是藉由極化分集系統來固定系統內的極化模態。其中極化分光器是構成極化分集系統中的一個重要的元件。本論文以 SOI 結構為基礎,設計極化分光器,並以縮小元件尺寸與增加元件操作頻寬為研究方向,以促進高密度積體光路的發展。 為了分析所設計的極化分光器,本論文使用三維有限差分時域法進行數值模擬分析,並整合非對稱型定向耦合器及漸變式波導結構形成極化分光器。首先,對於非對稱型定向耦合器,我們利用兩條非對稱直波導,將其設計成只有TE極化態可以耦合,藉由適當調整兩條波導的長度,使其所包含的能量相等,再加入漸變式的波導結構,成功的完成極化分光器的設計。為了改進極化分光器的長度與頻寬,我們對於低波導的後半段,選擇與高波導產生一個位移,分別考慮初始間距為 0.1 |
Abstract |
Polarization dependences of optical devices in highly-integrated optical systems become a major problem. To overcome this issue, one can implement polarization diversity scheme to achieve a single polarization on-chip network. One of the essential components in a polarization diversity scheme is the polarization beam splitter (PBS). In this thesis, we will a PBS based on a silicon-on-insulator (SOI) platform with reduced device size and broad operation bandwidth. We use the three-dimensional Finite-Difference Time-Domain (3D-FDTD) method to perform the simulation. First, we use two asymmetric waveguides to design an asymmetric directional coupler with only TE-like mode phase matching condition. We then tape the lower waveguide to keep the TE-polarized light, and split the TE- and TM- polarized light. By utilizing an asymmetrical directional coupler with a tapered waveguide, we have achieved a 7.3 |
目次 Table of Contents |
摘要i 英文摘要ii 目錄iii 圖目錄iv 表目錄viii 第一章 簡介1 1.1 絕緣層上鍍矽 2 1.2 極化分集系統 3 1.2.1 極化分光器 4 1.2.2 極化旋轉器 6 1.3 研究動機 8 第二章 數值模擬與分析方法11 2.1 波束傳播法11 2.2 有限差分時域法16 第三章 SOI 基本波導模擬與分析21 3.1 模態耦合理論 21 3.2 基本波導特性 27 第四章 極化分光器元件設計及分析36 4.1 非對稱型定向耦合器36 4.2 極化分光器41 第五章 結論與未來展望59 參考文獻60 |
參考文獻 References |
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