Features of high-order soliton molecule amplification in an Er-doped fiber amplifier

We report on the generation and amplification of soliton molecule regime in master oscillator fiber amplifier based on erbium-doped fiber laser. The amplification of 15 pulses regime with 432 fs pulses duration and 46 mW average power in 1m long erbium-doped fiber amplifier led to the generation of 20 pulses regime with 449 fs pulses duration and 102 mW average power.