High average power generation of single-transverse mode MW-peak power pulses using 80-μm core Yb-doped LMA fibers

Diffraction-limited nanosecond pulse generation with MW-peak powers and multi-mJ-energies has been explored using 80-μm core Yb-doped fibers, demonstrating 1-MW peak power pulses with 85-W of average power at 100-kHz and 1.56-MW peak at 50-Hz.