這篇論文中使用了桑亞克干涉儀(Sagnac Interferometor)與壓電陶瓷(PZT)來調製光源，使一連續光源(Continuous Wave)調製成週期性的脈衝，並可藉由改變輸入PZT的訊號週期來產生不同重覆率的脈衝，在重覆率為22.5kHz時，可達到約0.7μs的脈衝寬度(Pulsewidth)，並藉由調整PZT的振幅可以縮短脈衝寬度，另外本文也將探討PZT的振動週期與振幅對於雷射輸出功率與脈衝寬度的關係。
未來我們可以將此作為光時域反射儀(Optical Time Domain Reflectometor,OTDR)的光源。

In this thesis, we use a Sagnac loop with a PZT phase modulator as an on-off switch to modulate the laser output power.
The laser cavity containing such an optical modulator and a pumped erbium-doped fiber functions as a Q-switched resonator, generating a pulse train. Here, we investigate the pulse generation at different pump powers for the erbium doped fiber and voltage amplitudes of the signal applied to the PZT phase modulator. Pulse lasing with various time periods of square-wave signals applied to the PZT are also investigated. It is found that a stable pulse train can be generated at some signal periods or signal amplitudes of the square-wave signals applied to the PZT phase modulator. The width of the pulse generated can ranges from ~14μs to ~0.7μs at the repetition rates from 22.22kHz to 25kHz.

致謝 I
摘要 II
Abstract III
目錄 IV
圖目錄 VI
第一章序論 1
1.1研究背景 1
1.2研究動機 1
1.3文獻回顧 1
1.3.1桑亞克干涉儀[17] 1
1.3.2 採用Sagnac濾波器的環形雷射[18] 2
1.3.3使用桑亞克干涉儀的環形共振腔雷射[19] 4
1.3.4非線性光學環形反射共振腔[20] 5
1.4論文架構 6
第二章基本原理 7
2.1光纖(Optical Fiber) 7
2.2光纖耦合器(Fiber Coupler) 7
2.3分波多工器(Wavelength Division Multiplexing,WDM) 7
2.4壓電材料(Piezoelectric Material) 9
2.4.1壓電效應(Piezoelectricity) 9
2.4.2壓電材料 9
2.5光循環器(Optical Circulator) 9
2.6桑亞克干涉儀(Sagnac Interferometer) 10
2.7 Q開關雷射(Q-Switching Laser) 14
2.8 鎖模雷射(Mode Locking Laser) 14
2.9摻鉺光纖放大器(Erbium Doped Fiber Amplifier) 15
2.9.1摻鉺光纖中的雜訊 16
2.10光偵測器(Photodetector,PD) 16
第三章實驗架構 18
3.1前言 18
3.2實驗架構 18
3.2.1雷射共振腔的損失與濾波器的位置分析 18
3.2.2桑亞克環形共振腔長度改變 20
3.2.3 PZT調製原理與重複率 20
第四章 實驗結果與分析 23
4.1雷射Pump量測 23
4.2 雷射Pout vs Pin量測 23
4.2.1方波週期88.0μs~88.3μs的輸出量測 24
4.2.2其他方波週期與電壓的輸出量測 32
4.2.2.1方波週期20μs，振幅2V到10V的輸出波型量測 36
4.2.2.2 方波週期30μs，振幅2V到10V的輸出波型量測 38
4.2.2.3 方波週期40μs，振幅2V到10V的輸出波型量測 40
4.2.2.4 方波週期50μs，振幅2V到10V的輸出波型量測 42
4.2.2.5 方波週期60μs，振幅2V到10V的輸出波型量測 44
4.2.2.6 方波週期70μs，振幅2V到10V的輸出波型量測 46
4.2.2.7 方波週期80μs，振幅2V到10V的輸出波型量測 48
4.2.2.8 方波週期90μs，振幅2V到10V的輸出波型量測 50
4.2.2.9 方波週期100μs，振幅2V到10V的輸出波型量測 52
4.3脈衝雷射輸出波型 56
4.4 Q-switching 脈衝雷射調製 60
4.4.1 泵浦功率與功率門檻值(Threshold Pump Power) 60
4.4.2泵浦功率、方波週期與脈衝寬度的關係 61
4.4.3 方波振幅、脈衝雷射輸出與脈衝寬度的關係 71
4.4.3.1 利用Mach Zehnder Interferometer量測PZT輸出波型 72
4.4.4工作週期(Duty Cycle)與脈衝寬度 87
4.4.5 Q開關的重複率 87
第五章結論與未來展望 89
5.1結論 89
5.2未來展望 89
參考文獻 91

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