Wavelength tunable ultra-short pulses based on a flat broadband spectrum generated in a nonlinear ytterbium-doped fiber amplifier
Xu Run-Qin, Dong Zi-Kai, Tian Jin-Rong, Li Ke-Xuan, Song Yan-Rong
       

(color online) (a) Spectrum and (b) autocorrelation trace of seed pulses. 1.41 is the deconvolution factor for Gaussian profile.