21.4 kW peak power from a gigahertz multimode-diode-pumped solid-state laser with carrier-envelope offset frequency detection

We present a high-power gigahertz multimode-diode-pumped Yb-doped solid-state laser for frequency comb generation without additional pulse compression or amplification. It generates 121-fs pulses at an average power of 3.33 W, leading to a record-high peak power of 21.4 kW. The combination of a high repetition rate, femtosecond pulses and a high power level makes the present laser system a promising source for multi-GHz self-referenced frequency combs. The carrier-envelope offset frequency beat was detected with 30 dB S/N ratio at 100 kHz RBW. In addition, the robust pumping scheme enables the possibility of commercialization of such compact and reliable laser sources for numerous applications.