Cladding-pumped fibre laser/amplifier system generating 100µJ energy picosecond pulses

We report on a fibre amplifier system generating picosecond pulses with 100µJ energy. A mode-locked fibre oscillator is used to seed a multi-stage acousto-optically gated fibre amplifier. The final stage comprises a cladding pumped multimode Er3+/Yb3+ co-doped fibre pumped with 4 W of power at 982 nm and produces up to 250µJ pulse energy