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研究生:陳怡豪
研究生(外文):Yi-Hao Chen
論文名稱:寬頻放大自發性輻射光纖光源之研究
論文名稱(外文):A Study of Broad-Band Amplifier Spontaneous Emission Light Source
指導教授:王立康
指導教授(外文):Li-Karn Wang
學位類別:碩士
校院名稱:國立清華大學
系所名稱:電機工程學系
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:2004
畢業學年度:92
語文別:中文
論文頁數:76
中文關鍵詞:寬頻光源放大自發性輻射摻鉺光纖放大器死頻帶
外文關鍵詞:broadband light sourceamplifier spontaneous emissionEDFAdead zone
相關次數:
  • 被引用被引用:1
  • 點閱點閱:108
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  • 收藏至我的研究室書目清單書目收藏:0
C band ASE光纖光源與L band ASE光纖光源具有不同的性質,本論文中,我們針對L band(1570nm-1610nm) ASE光纖光源的低效率問題,我們利用Fiber Loop Mirror反射光源的機制,設計一個雙端激發光源的double pass系統架構,並嘗試利用un-pump的系統結構,將主要的L band 光源放大器拆成兩部份,以使得ASE在架構中能更有效率的被利用,以及利用grating反射C band光源來抑制系統內的C band ASE生長,使得能量能能夠有效留在系統內,以供L band ASE使用的方式,再進一步提升L band ASE光源的輸出功率(output power)及功率轉換效率。
在傳統波段的C band(1530nm~1560nm) ASE 光纖光源部分,single pass backward(SPB) configuration架構由於架構簡單而且不容易產生lasing的現象,因此在現有的文章中,最常被拿來當作C band ASE光纖光源的架構,而利用反射鏡設計出來的double pass forward(DPF)及double pass backward(DPB) configuration,此兩種架構則可以提供更高的輸出功率和更好的功率轉換效率,其中DPB架構又優於DPF架構,因此在本論文中,我們使用DPB架構,來實現一個高輸出功率、高功率轉換效率的C band ASE光纖光源。
接下來,我們利用wavelength selective coupler將C band以及L band兩種ASE光源合併在一起,以實現一個頻譜寬度包含了C band以及L band的broadband ASE光纖光源,在兩種ASE光源合併的過程當中,由於wavelength selective coupler在C band及L band交界處有一個約10nm頻寬的死頻帶(dead zone,1560nm~1570nm),若我們單純的將兩種ASE光源的輸出能量設計集中在C band及L band範圍內,則兩種ASE光源經過wavelength selective coupler合併後,頻譜中的死頻帶將會有約10dB的頻譜凹陷,所以,若broadband ASE光源要將頻譜中的死頻譜做平坦化的處理,我們必須在設計C band和L band ASE光源時,將輸出能量的頻譜分佈略為偏向死頻帶中,用以平坦化兩種ASE光源經過wavelength selective coupler後,所產生死頻帶中的輸出功率頻譜凹陷部分。
最後的實驗結果顯示,我們實現了一個具有輸出功率為122.3mW、平均波長為1567.423nm、、功率轉換效率為27.17%的寬頻(1530nm~1600nm)ASE光纖光源。
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