本論文包含脈衝延展器、脈衝壓縮器、摻鐿鎢酸釓鉀再生放大器、摻鐿釔鋁石榴石單通道放大器四個項目的設計及搭建。主要是利用摻鐿鎢酸釓鉀再生放大器將雷射震盪器產生的奈焦耳種子光源進行第一次放大至數百微焦耳。接著使用摻鐿釔鋁石榴石單通道放大器再做更進一步的放大，可以有效增加脈衝能量至毫焦耳及縮短壓縮後的脈衝時寬。
系統架設是先將種子光源經過脈衝延展器後，延展至皮秒等級的脈衝雷射，再進入摻鐿鎢酸釓鉀再生放大器及摻鐿釔鋁石榴石單通道放大器，最後再通過脈衝壓縮器將脈衝壓縮回飛秒等級的超快雷射脈衝，此設計可以有效地避免光學元件因為雷射脈衝峰值功率過高而損壞，並使得延展後的雷射脈衝在兩級放大器中有較高的增益空間。
實驗結果上，雷射震盪器種子光源經過兩級放大後可以產生輸出4.4瓦，重複率5千赫茲，脈衝能量0.88毫焦耳，脈衝時寬之半高全寬400飛秒的超快雷射脈衝，應用上可以作為電子加速實驗第三級放大器前的種子光源及高次諧波產生之光源。

The thesis including how to design and build up pulse stretcher, pulse compressor, Yb:KGW regenerative amplifier and Yb:YAG single pass amplifier. The main purpose is using Yb:KGW regenerative amplifier to amplify the nanojoule level seeding pulse comes from laser oscillator to hundreds microjoule level. Next stage is passing through the Yb:YAG single pass amplifier. It can easily amplify the pulse energy to milijoule level and make the pulse duration after pulse compressor become shorter.
The processing of this system is first stretching the seeding pulse to picosecond pulse. And then pass through the Yb:KGW regenerative amplifier and Yb:YAG single pass amplifier. Finally passing through the pulse compressor to achieve femtosecond level ultrafast pulse. The processing can avoid the damage of optical component and let the amplification of laser pulse become more efficiency.
In experiment, we amplify the laser oscillator seeding pulse to 4.4 W output power, 5 kHz repetition rate, 0.88 mJ pulse energy, 400 fs pulse duration in FWHM. It can be used in seeding third regenerative amplifier of electron acceleration experiment or be the light source of high harmonic generation.

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