本論文設計及架設一台利用雙級摻鐿光纖放大器的主振盪器功率放大器結構的皮秒高功率雷射。種子光源為二極體泵浦之被動鎖模Nd:GdVO4固態雷射，前級放大器是以光纖纖核直徑為10微米的摻鐿光纖放大器，主要放大器為光纖纖核直徑為30微米的摻鐿光纖放大器。種子光源(波長=1064 nm)經過兩級光放大器後，平均輸出功率可達60 W，脈衝寬度約為10皮秒 (脈衝重複率~ 250MHz)，並且脈衝光束輪廓佳 (M2 ~ 1.6)。實驗結果，也與理論模擬預測相吻合。

In this thesis, we designed, constructed and characterized a high-power master oscillator power amplifier system using a dual-stage ytterbium doped fiber amplifier. A diode-pumped solid-state passively mode-locked Nd:GdVO4 laser is the seed laser. For the preamplifier stage, the 10 μm core Yb-doped fiber amplifier is used. For the main amplifier stage, the 30 μm core Yb-doped fiber amplifier is used. After amplification, we can achieve over 60 W output power of 1064 nm signal with pulse width of ~ 10 picosecond (repetition rate ~ 250 MHz). The amplified pulses exhibit excellent beam quality (M2 ~ 1.6). The experimental results are in good agreement with theoretical and predictions.

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