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研究生:鄧智銘
研究生(外文):Chih-MingTeng
論文名稱:高功率Q和增益切換雙脈衝摻鐿全光纖式雷射系統之模擬與分析
論文名稱(外文):Simulation and analysis of high-power passively Q-and gain-switched Yb3+ all-fiber laser system
指導教授:蔡宗祐蔡宗祐引用關係
指導教授(外文):Tzong-Yow Tsai
學位類別:碩士
校院名稱:國立成功大學
系所名稱:微電子工程研究所碩博士班
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:2012
畢業學年度:100
語文別:中文
論文頁數:68
中文關鍵詞:Q切換增益切換全光纖雷射
外文關鍵詞:Q-switchedGain-switchedAll fiber laser
相關次數:
  • 被引用被引用:0
  • 點閱點閱:217
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  • 下載下載:12
  • 收藏至我的研究室書目清單書目收藏:0
本論文將設計和模擬分析一摻鐿全光纖式Q與增益切換雷射系統,並極大化其輸出功率。此雷射系統架構使用摻雜鐿的雙披覆增益光纖以及摻雜鐿的飽和吸收體光纖來藉以產生高功率的脈衝雷射,並利用增益切換的方式來達成雙波長光子脈衝雷射。論文中將會利用Matlab軟體來模擬在改變Q切換波長、增益切換波長、光纖光柵反射率、飽和吸收體長度來進行討論在各種情況下的輸出特性,並且在文中推導有關雙波長光子所需的方程式來對應其理論以及結果的關聯;在鐿原子方面,我們將根據其材料的放射及吸收頻譜來模擬,配上適當波長的共振腔並使用Q與增益切換的方式產生1~1.1 μm雷射。
The purpose of the study is to analyze and numerically optimize a passively saturable-absorber Q- and gain-switched Yb3+ all-fiber laser system. By use of a Yb-doped double-clad fiber as the gain medium and a Yb-doped single-cladding fiber as the saturable-absorber, a Q- and gain-switched dual-wavelength pulsed laser system with high power output could be achieved. The parameters of the Q- and gain-switching wavelengths, the reflectivity of the output coupler, and the absorption strength of the saturable absorber were simulated and analyzed in Matlab, based on the rate equations derived in Chap. 2. Ideally, laser pulses at a broad Yb emission band of 1-1.1 m could be achieved with suitable fiber Bragg gratings (FBG).
摘要 i
Abstract ii
致謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第1章 緒論 1
1-1 前言 1
1-2 研究動機 3
1-3 雙披覆光纖 6
1-4 論文架構 8
第2章 Q與增益切換雙共振腔理論 9
2-1 能階簡介 9
2-2 鐿能階探討與波長1020nm產生原理 11
2-3 產生Q切換雷射條件 13
2-4 雙共振腔光子方程式 20
第3章 雷射架構設計與模擬結果 25
3-1 雷射架構目的與設計流程 26
3-2 數值模擬條件 29
3-3 模擬結果 33
3-4 SAQS長度與共振腔反射率 36
3-4-1 SAQS長度 37
3-4-2 共振腔反射率 40
第4章 脈衝波長於輸出特性的影響 44
4-1 改變Q切換波長對輸出特性的影響 44
4-2 改變增益切換波長對輸出特性的影響 49
第5章 總結與未來展望 53
5-1 模擬結果總結 53
5-2 未來展望 54
參考資料 55
附錄A 59
Q切換雷射Rate equations推導 59
附錄B 65
Q切換脈衝輸出特性分析 65
脈衝特性分析 67

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