Generation of 15W femtosecond laser pulse from a Kerr-lens mode-locked Yb:YAG thin-disk oscillator

Peng Yingnan¹, Zhang Jinwei², Wang Zhaohua², Zhu Jiangfeng¹, Li Dehua², Wei Zhiyi^{1, 2, †,}

(a) SH power and efficiency variation with the fundamental power. Inset: corresponding spectrum of green pulses. (b) Beam quality measurement of the frequency-doubled 515 nm beam.