Pulse generation in Yb-doped polarization-maintaining fiber laser by nonlinear polarization evolution

Liang Cheng-Bin¹, Song Yan-Rong^{1, †}, Dong Zi-Kai¹, Wu Yun-Feng¹, Tian Jin-Rong¹, Xu Run-Qin²

Characteristics of lasers with three cavity lengths: (a) plots of output power versus pump power, and (b) spectra of lasers.