- 學位論文
藉彎曲單模光纖之C-band和L-band波長可調式光纖雷射之研究
Study of C-band and L-band Tunable Fiber Lasers By Bending Single Mode Fiber
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摘要
我們使用環形迴路共振腔(ring cavity)作為光纖雷射的共振腔體，架構中有一個光環流器(Circulator)使其成為單一方向(uni-direction)的雷射共振腔體，單一方向(uni-directional)雷射共振腔體輸出的雷射有較其他類型的共振腔體穩定的性質。本論文選擇了適當長度的摻鉺光纖，並且使用一個固定共振腔長度之Fabry-Perot etalon，利用其FSR使在定溫下之雷射模態皆相差1.2nm左右，並搭配彎曲單模光纖造成各波長不同程度之損耗來當作調變雷射波長之濾波器，使得連續可調範圍相當的寬廣，在架構中使用C+L WDM Coupler、Attenuator(衰減器)來達成快速切換C-band或是L-band 連續波長可調式光纖雷射或是C-band和L-band同時產生雷射之雙波長光纖雷射，由於在共振腔內還有加上一個極化控制器，所以可以調整雷射輸出之功率以及選擇雷射波長，並且於環型光纖雷射外再加上一級摻鉺光纖放大器，利用增益飽和之特性，並搭配PC可以調整雷射輸出功率之功能，使輸出更相對的均勻。相較於其他波長連續可調式光纖雷射，使用了一些如FFP或是TBF在價格上相當昂貴之光纖元件，由於我們使用了彎曲單模光纖的方式來達到連續調變雷射波長的目的，所以成功的降低了成本，是我們的一大優勢。
關鍵字
光纖雷射參考文獻
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