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系統識別號 U0026-1207201015431900
論文名稱(中文) 使用摻銩飽和吸收光纖的全光纖被動式Q切換鉺雷射
論文名稱(英文) Passively Q-switched erbium all-fiber lasers by use of thulium doped saturable-absorber fibers
校院名稱 成功大學
系所名稱(中) 微電子工程研究所碩博士班
系所名稱(英) Institute of Microelectronics
學年度 98
學期 2
出版年 99
研究生(中文) 洪士豪
研究生(英文) Shin-Hao Hung
電子信箱 inferno0301@msn.com
學號 q1697123
學位類別 碩士
語文別 中文
論文頁數 69頁
口試委員 指導教授-蔡宗祐
口試委員-鄭中緯
口試委員-崔祥辰
口試委員-黃勝廣
口試委員-魏明達
中文關鍵字 Q切換  脈衝雷射  全光纖  被動式 
英文關鍵字 Q-switch  pulse laser  all fiber  passively 
學科別分類
中文摘要 本文使用摻銩光纖作為飽和吸收材料來完成波長1570 nm的全光纖被動式Q切換鉺脈衝雷射。並根據bleaching實驗測量得到摻銩光纖在1570 nm 的absorption cross section為1.4410-20 cm2。此系統產生脈衝能量為9 μJ的連續脈衝,脈衝寬度約為420 ns,並穩定操作在0.1到3 kHz,重複率標準差相對為4到188 Hz。在長時間的操作下,暗光子造成系統的衰減約為12%。在980-nm LD最大激發功率約為230 mW時,脈衝的重複率可達到6 kHz。
英文摘要 We demonstrate all-fiber passively Q-switched erbium lasers at 1570 nm using Tm3+-doped saturable-absorber fibers. The absorption cross section of a Tm3+-doped fiber at 1570 nm was measured in a bleaching experiment to be about 1.4410-20 cm2. With a thulium-doped fiber, sequential pulses with a pulse energy of 9J and a pulse duration of about 420 ns were stably produced at repetition rates in the range 0.1 to 3 kHz. The corresponding deviation of the repetition-rate stability was 4 to 188Hz. The loss caused by photo-darkening was about 12% after a long time operation. The maximum pulse repetition rate was 6 kHz, limited by the maximum pump power of a 980- nm laser diode, about 230 mW.
論文目次 第1章 緒論...............................................................................................1
1-1前言......................................................................................................1
1-2研究動機..............................................................................................3
1-3論文架構..............................................................................................5
第2章 原理...............................................................................................6
2-1增益與SAQS光纖能階......................................................................6
2-2 Q切換雷射公式與模擬條件..............................................................8
2-3 Bleach推導........................................................................................12
第3章實驗設計與模擬...........................................................................13
3-1駐波型被動式Q切換.......................................................................13
3-2環型被動式Q切換...........................................................................17
3-2 Bleach實驗........................................................................................20
3-3-1 Bleach實驗架構.............................................................................20
3-3-2 Bleach實驗模擬流程.....................................................................21
3-4全光纖被動式Q切換雷射的穩定度...............................................23
第4章 實驗數據討論與改良.................................................................25
4-1 駐波型被動式銩Q切換鉺雷射.......................................................25
4-1-1 駐波型被動式銩Q切換鉺雷射結果...........................................25
4-1-2 駐波型被動式銩Q切換鉺雷射長時間操作...............................38
4-2 環型被動式銩Q切換鉺雷射結果...................................................39
4-3 銩Q切換鉺雷射系統改良...............................................................42
4-4 Bleach................................................................................................45
4-4-1 Bleach實驗......................................................................................45
4-4-2 Bleach實驗模擬..............................................................................48
4-5銩在Q切換雷射系統的穩定度........................................................51
第5章 結論.............................................................................................54
5-1實驗結果討論....................................................................................54
5-2未來展望............................................................................................55
參考文獻...................................................................................................56
附錄A.......................................................................................................60
附錄B.......................................................................................................67
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