Generation of 85 fs mid-IR pulses with up to 2.4 W average power using an Er: ZBLAN fiber mode-locked oscillator and a nonlinear amplifier

In this paper, we report a high power and compact mid-IR ultrafast laser system consisting of an Er:ZBLAN fiber-based mode-locked oscillator and a nonlinear amplifier. The mode-locked pulses are amplified and simultaneously nonlinearly compressed to sub-100 fs, without using any external pulse compressor or dispersion-managing stretcher. The output pulses have similar to 85 fs pulse durations at similar to 2.85 mu m, with an average power of up to 2.4W, and pulse energies of >40 nJ. This constitutes the highest average power sub-100fs duration pulses generated from a mid-IR fiber laser system to date. (C) 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

This paper presents a high power and compact mid-IR ultrafast laser system, which achieved the highest average power sub-100fs duration pulses to date. The output pulses have similar to 85 fs pulse durations at similar to 2.85 mu m, with an average power of up to 2.4W, and pulse energies of >40 nJ.