2.5W diode-pumped femtosecond Yb:KGW laser

Abstract

We have demonstrated an end-pumped mode-locked femtosecond Yb:KGW laser which assisted by a semiconductor saturable absorber mirror (SESAM). By using a 2.5% output coupler, the oscillator generated average output power of 2.5 W which pulses duration was 192 fs at a repetition rate of 69.5 MHz, corresponding to a pulse energy of 36 nJ and peak power of 187 kW.