約分諧波鎖模摻鉺光纖雷射之研究

Abstract

一般來講,在利用主動約分諧波鎖模來提高摻鉺光纖雷射的脈衝重複率的時候,也會造成脈衝序列的振幅不等高性,而文獻上解決這個問題的方法都必須利用其他元件和機制來改善,但本論文使用一種方法來提高脈衝重複率及改善因約分諧波鎖模所造成的脈衝不等高性,而且僅僅只改變共振腔內的AM調變器之DC Bias就可達到這個目的,而不必像文獻上所說的依賴其他元件。

Generally speaking, when we increase the repetition rate of the pulse trains of erbium doped fiber laser by rational harmonic mode locking, the amplitude of the pulse trains would not equal as a result. This phenomenon must usually be improved by the use of the other element and setup in the previous thesis. In this thesis we use a new method to increase the repetition rate and improve the unequal pulse trains amplitude caused by rational harmonic mode locking only by changing the DC bias voltage of AM modulator in the cavity.