40GHz 非同步鎖模掺鉺光纖光固子雷射

Abstract

在本論文當中，我們透過實驗以及電腦模擬兩種方式對非同步鎖模掺鉺光纖光固子雷射作一番探索了解。實驗上我們嘗試使用非同步鎖模的方法成功的產生出重複率20、30、40GHz的光脈衝序列；脈寬分別為628、596、849femto-seconds；超模抑制比都可以大於40dB。理論模擬方面，也証實了非同步鎖模可以產生高重複率的短脈衝。我們也利用了電腦模擬，所得的結果和實驗的結果也有定性的吻合。另一方面，我們也探討了雷射共振腔中不同參數對於穩態脈衝脈寬及時基誤差的影響；相位調變深度、相位調變頻率、色散、疊加波鎖模對脈寬及時基誤差都有不同程度的影響。

In this thesis, asynchronous mode-locked Erbium-doped fiber soliton lasers are explored in experiments and computer simulation. In experiments, we successfully generate 20, 30, 40 GHz pulse trains; the pulse widths are 628, 596, 849 fs respectively with SMSR >40 dB. In simulations, it’s proved that asynchronous mode-locking is a viable method to generate ultra-short pulse trains at the high repetition rates and the results agree with those from experiments qualitatively. Besides, the effects of various cavity parameters on the pulse width and timing variation are also simulated.