Fig. 1. Schematic illustration of the passive erbium-doped mode-locked fiber laser. (a) Conventional soliton fiber laser;(b) Dissipative soliton fiber laser; (c) Setup of the erbium-doped fiber laser amplifier and DFT pulse measurement

Fig. 2. Pulse parameters of mode-locked seed source. Top row: Conventional soliton; Bottom row: Dissipative soliton. (a), (d) Pulse train; (b), (e) Fundamental repetition RF spectrum (Bandwidth resolution: 100 Hz; Insert: 1 GHz span); (c), (f) Autocorrelation trace

Fig. 3. Pulse spectra. (a) Conventional soliton seed; (b) Amplified conventional soliton; (c) Dissipative soliton seed; (d) Amplified dissipative soliton. Black line: Logarithmic coordinate (OSA); Red line: Linear coordinate (OSA); Blue line: Linear coordinate (DFT)

Fig. 4. Spectral (up row) and single pulse energy (down row) evolution of conventional soliton.(a) Buildup process; (b) Amplification process

Fig. 5. Spectral (up row) and single pulse energy (down row) evolution of dissipative soliton.(a) Buildup process; (b) Amplification process

Fig. 6. Simulated spectra and chirp parameters. (a), (b) Conventional soliton; (c), (d) Dissipative soliton;(e), (f) Amplified conventional soliton; (g), (h) Amplified dissipative soliton

Fig. 7. Simulated evolution of soliton spectra versus amplification power. (a) Conventional soliton; (b) Dissipative soliton