本論文之實驗架構設置包括三個反射波長分別為1545.3nm、1550.2nm與1555.2nm的布拉格光纖光柵，其反射率皆約為87%，用其作為雷射輸出波長的選擇元件。將此三個布拉格光纖光柵連接後形成三個共振腔，在經過一系列摻鉺光纖長度的測試之後，找出適合此三個共振腔的摻鉺光纖長度做為增益介質，同時由一波長為1480nm的半導體雷射做為泵激光源，隨著泵激光源功率的逐步提升，此三段摻鉺光纖也能依序的被有效激發，因此，整個實驗架構一開始可以藉由改變泵激光源的功率大小獲得初步的雷射輸出波長可調性質。
本論文主要設計的實驗架構概念是藉由外部光學注入的方式造成雷射輸出波長發生切換的行為。藉由此種外部光學注入，我們得以改變固定泵激光源功率下各雷射波長在摻鉺光纖內的增益競爭優勢，因而可以於共振腔輸出端偵測到雷射輸出波長切換的情形。此種切換方式，相較於需要改變泵激光源功率來進行切換的行為來說，雷射輸出功率穩定度更佳，而且雷射輸出功率也獲得了提升，另外，此種切換雷射輸出波長的方式也比較方便。

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