Fig. 1. Diagram of experimental setup. (a) Self-similar pulse mode-locked fiber laser and measurement system; (b) Transmission curve of filter; (c) Homemade erbium-doped fiber amplifier

Fig. 2. Output pulse characteristics. (a) Pulse train; (b) RF spectrum (range: 1 MHz); (c) Spectral comparison plot between direct and amplified pulse output; (d) Autocorrelation trace [inset: pulse duration (red line) and power after pulse amplification (blue line) versus pump power]

Fig. 3. Simulated evolution of pulse duration and 10 dB spectral width in cavity, point 1, 2, and 3 correspond to 0, 5.5, 9.6 m inside the EDF

Fig. 4. Simulated time domain waveforms and chirp characteristics of the output pulse (a) and spectrum (b) at the different positions in the cavity

Fig. 5. Numerical simulation results of the amplifier. (a) Pulse time domain; (b) Spectrum before and after amplification;(c) Spectral evolution inside the fiber; (d) Pulse duration evolution inside the fiber