Pulse generation in Yb-doped polarization-maintaining fiber laser by nonlinear polarization evolution
Liang Cheng-Bin1, Song Yan-Rong1, †, Dong Zi-Kai1, Wu Yun-Feng1, Tian Jin-Rong1, Xu Run-Qin2
       

Characteristics of mode-locking pulses: (a)–(c) pulse trains with cavity lengths of 23 m, 38 m, and 99 m respectively, and (d)–(f) corresponding RF spectra.