本論文將會以費比-培洛雷射二極體所構成之共振腔產生的方波光源注入增益競爭之共振腔，藉以產生兩種不同波長(1550、1555nm)的光並以交替激射形式輸出。增益競爭之共振腔部分則是在兩光纖光柵前分別放置摻鉺光纖作增益競爭，再以10/90之光耦合器之10%輸出，90%打回光纖光柵作共振，最後改變pump雷射之功率來調變輸出波長。
雷射二極體所構成之共振腔是以函數產生器之方波電壓訊號輸入二極體驅動器，再輸入雷射二極體產生多模態的雷射，而後以摻鉺光纖放大訊號並由光纖光柵選取所需波長，並回饋注入原雷射二極體作反饋以讓系統產生共振雷射光。將此雷射二極體所構成之共振雷射光注入前面所述的增益競爭之共振腔以產生兩波長交替激射(lasing)。
最後再討論與預期會產生類似方波之輸出訊號不一樣的地方，分別以注入光之光功率、重複率、占空因數(duty cycle)與在增益競爭之共振腔的幫浦(pump)雷射功率，這些因數會對共振腔之輸出造成什麼影響來作討論。

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