Fig. 1. Simulated amplified pulse under different saturation gain energies and pulse evolution in the fiber when output energy is 17 nJ

Fig. 2. Schematic of 2.8 μm mode-locked Er∶ZBLAN fiber oscillator and amplifier

Fig. 3. Output performance of mode-locked oscillator. (a) Pulse train in nanosecond and millisecond time scales; (b) signal-to-noise ratio; (c) autocorrelation curve of mode-locked pulses; (d) mode-locked spectrum

Fig. 4. Curve of amplifier output power with pump power

Fig. 5. Output performance of amplifier. (a) Autocorrelation curve of amplified pulse; (b) amplified spectrum