Development of High-power Yb-based Femtosecond Amplifiers

Shih-Cheng Liu^1*, Zhe-Ming Tang¹, Te-Yuan Chung², Ming-Wei Lin³, Ming-Chang Chen¹

¹Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan
²Department of Optics and Photonics, National Central University, Taoyuan, Taiwan
³Nuclear Engineering and Science, National Tsing Hua University, Hsinchu, Taiwan

* Presenter:Shih-Cheng Liu, email:scliu.iams@gmail.com

We report on a home-built high power chirped-pulse amplification (CPA) Yb-based laser system, which can deliver pulse energy of up to 1.5mJ with the output of 20W and a pulse duration of ~250 fs. This laser is first seeded by a femtosecond fiber oscillator and then further amplified by one Yb:KGW regenerative amplifier and one Yb:YAG boost amplifier. Our laser is very suitable for applications of micro-machining and bright high-order harmonic EUV generation.

Keywords: Yb-based, CPA, femtosecond , home-built