7.6-W diode-pumped femtosecond Yb:KGW laser

Cao Yan-Fang¹, Meng Xiang-Hao², Wang Jun-Li^{1, †}, Wang Zhao-Hua^{2, ‡}, Cheng Meng-Yao¹, Zhu Jiang-Feng¹, Wei Zhi-Yi^{2, 3, 4}

RF spectra of the pulse train. (a) RF spectrum at the fundamental beat note with the resolution bandwidth of 1 kHz. (b) RF spectrum at 1-GHz wide-span with the resolution bandwidth of 100 kHz.