本篇論文裡我們嘗試製造一個以摻鉺光纖(Erbium doped fiber)放大器和光纖拉曼放大器(Fiber Raman amplifier)混合作為增益介質的光纖放大器系統，以達到增益平坦化(Gain flattening)的效果。並且藉由調整摻鉺光纖的位置與長度，試著讓光訊號的增益最佳化。並且與純粹使用摻鉺光纖放大器以及純粹使用光纖拉曼放大器做比較，這個混合式光纖放大器擁有一些它們所沒有的優點。

We intend to produce a fiber laser amplifier by constructing a hybrid system of Erbium doped fiber amplifier and fiber Raman amplifier, to obtain the effect of gain flattening. And we try to optimize the gain of the signal laser by adjusting the length and location of Erbium doped fiber. Comparing to those fiber amplifiers which only use Erbium doped fiber or which only use fiber Raman amplifier, this hybrid system has some unique advantages.

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