Low-repetition-rate, all-polarization-maintaining Yb-doped fiber laser mode-locked by a semiconductor saturable absorber
Xiao Xiao-Sheng†,
       

(color online) (a) Output power of the MOPA with increasing pump power of the 3rd-stage amplifier. (b) Spectra of the seed and the amplified outputs with average powers of 2.18 W and 3.36 W, respectively.