| 研究生: |
龔立偉 Li-Wei Kung |
|---|---|
| 論文名稱: |
自由空間波長多工器之設計與製作 Design and Fabrication Free-Space based WDM System. |
| 指導教授: |
張正陽
Jenq-Yang Chang |
| 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 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 100 |
| 中文關鍵詞: | 波長多工器 、自由空間光柵 、光纖通訊 |
| 外文關鍵詞: | blazed grating, opticcal fiber communication, free space based WDM |
| 相關次數: | 點閱:11 下載:0 |
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光通訊為了提升單一光纖的通道流量,將會在固定範圍的頻寬(Band Width)內,分割出更多的頻道數目(Channel)。要於單一光纖中混合或分離多項訊號,就必須利用分波多工器(WDM)。
本論文所進行的技術研發,是採用以光柵為主的自由空間架構來達成波長分工的功能(Free-Space Grating-based structure)。其中先以光學軟體ZEMAX、ASAP等,設計兩種系統的架構:單透鏡單光柵式與稜鏡光柵式,工作效率分別為-7dB與-5.5dB,單一頻道寬度約為0.28nm與0.2241nm。之後我們選擇稜鏡光柵式之架構,利用半導體製程技術,在與晶面夾角為15°的方解石切片上,製作出週期8 µm、傾斜角度為15°、繞射效率為70%的傾斜式光柵(Blazed Grating)。最後以波長為1520~1620nm(C+L Band)的測試光源,進行整體的光學特性量測,系統的效率為-9dB,單一通道頻寬約為2.241nm,以非球面透鏡進行光纖耦合效率為-1.15dB,並以CCD觀察光柵繞射品質,最後檢討問題所在,確定未來發展方向。
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