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研究生:侯建正
研究生(外文):Chien-Cheng Hou
論文名稱:電光調制之鎖模環型摻鉺光纖雷射之輸出特性研究
論文名稱(外文):The Study of The Output Characteristics of a Mode-locked EDFA Fiber Ring Laser by Elerto-optical Modulation
指導教授:施明昌施明昌引用關係
指導教授(外文):Ming-Chang Shih
學位類別:碩士
校院名稱:國立高雄大學
系所名稱:電機工程學系碩士班
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:2011
畢業學年度:99
語文別:中文
論文頁數:86
中文關鍵詞:光纖環型雷射主動鎖模電光調變光開關
外文關鍵詞:Fiber Ring LaserActively Mode-lockingElectro-optical ModulationOptical Switch.
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  • 下載下載:1
  • 收藏至我的研究室書目清單書目收藏:0
實驗中使用980nm雷射激發掺鉺光纖產生在範圍1525 nm ~ 1565 nm寬頻光源,同時也做為光纖環型雷射架構放大器用途,環型迴路中添加兩種不同頻寬的濾波器,並且使用電光調變器(eletro-optical modulator)對光纖環型雷射作調變,達到主動鎖模之目的產生超短脈衝雷射。比較兩種不同頻寬的濾波器,以fliter (13.4nm)為架構時,調制頻率操作在3.73GHz,脈衝寬度為48ps;以FBG(0.1~0.2nm)為架構時,外部調制頻率操作在3.202GHz,脈衝寬度為156ps。
另外在實驗中也將EDF當作光開關控制介質,輸入可調雷射做為控制光源(control light),來控制環型雷射光訊號(signal light),形成可以單純利用光來控制環型光纖鎖模雷射的輸出,其最高調制頻率可達到1kHz,同時我們也研究EDF對不同波長的控制光訊號吸收效率的不同,造成光開關啟動能量之差異。
In this thesis we used a erbium-doped fiber which is pumped by a 980 nm laser diode to achieve a profile covered from 1525 nm to 1565 nm. At the same time the EDF be used to amplify the signal in a fiber ring laser system,and add two different bandwidth filters.
Add an electro-optical modulator be used to study the effects of fiber ring laser mode -locking characteristic.Comparing two different bandwidth filters, Stable mode-locking with a pulse width of 48 ps was achieved at 3.73 GHz modulation frequency (filter:13.4nm). Stable mode-locking with a pulse width of 156 ps was achieved at 3.202 GHz modulation frequency(FBG:01.~0.2nm).
The EDF also be used as a optical switch in the experiment.The tunable laser light (control light) be used to control the ring laser signal (signal light), and we can simply use light to control the output of fiber ring laser. The highest modulation frequency is up to 1kHz, We also study EDF which have different absorption for different optical signal,and the optical switch have influence for different energy.
致 謝........................................................................I
中文摘要......................................................................II
英文摘要....................................................................III
目錄.........................................................................IV
圖表目錄......................................................................VI
第一章 緒論...................................................................1
第二章 基本原理...............................................................4
2-1 掺鉺光纖放大器.....................................................4
2-1-1 摻鉺光纖放大器簡介...........................................4
2-1-2 980 nm 與1480 nm 之泵激光源比較..........................................5
2-1-3 掺鉺光纖放大器工作原理.......................................5
2-1-4 飽和增益....................................................13
2-1-5 掺鉺光纖雷射................................................14
2-2 摻鉺光纖雷射組成元件..............................................16
2-2-1 泵激光源....................................................16
2-2-2 光纖耦合器與分波多工器......................................16
2-2-3 光隔離器....................................................17
2-2-4 光纖偏振控制器..............................................17
2-3 電光調變..........................................................19
2-3-1電光調變原理.................................................19
2-3-2 波克爾斯效應................................................23
2-3-3 克爾效應....................................................24
2-4 光纖光柵原理......................................................26
2-5 主動鎖模原理......................................................31
第三章 主動鎖模光纖環型雷射電光調制之特性研究................................39
3-1 主動鎖模光纖環型雷射電光調制架構..................................39
3-2 電光調制架構實驗結果與分析........................................41
第四章 飽和吸收體材料元件對環型主動鎖模雷射之光開關特性探討..................54
4-1 主動鎖模環型雷射之光開關架構......................................54
4-2 環型鎖模雷射之光開關架構實驗結果與分析............................56
(A)光吸收體(EDF)的特性探討與量測..................................56
(B)改變可調雷射波長與能量量測環型雷射光訊號之能量變化.............62
(C)改變可調雷射調制頻率,量測環型雷射光訊號受調制的情形...........68
第五章 結論..................................................................73
參考文獻......................................................................................................................77
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