Material processing with lasers has already been shown to be a superior tool for different industrial applications. In this thesis, we developed a pulsed fiber-based high-power laser for material processing. First, we designed and constructed a diode-pumped passive mode-locked Nd:GdVO4 seed laser. It output is amplified in a 7m-long ytterbium-doped fiber so that the average power is as high as 28W. We then use the nonlinear crystal KTP for frequency doubling to generate 4.3W of green light. The experimental data are in good agreement with theoretical and simulation results.

雷射在不同的工業中已被廣泛的應用。本論文是研發一種適用於以材料加工的高功率脈衝式光纖雷射。首先，我們設計及架設一台皮秒級，雷射二極體泵浦之被動鎖模Nd:GdVO4種子雷射(波長=1064nm)。其輸出經摻鐿光纖放大，平均功率達28W (重複率≅250MHz)。接著，利用KTP晶體倍頻可產生波長為532nm，功率高達4.3W的綠光。實驗結果，也與理論模擬相吻合。

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