We report on the development of a high-power mid-infrared frequency comb with 100 MHz
repetition rate and 100 fs pulse duration. Difference frequency generation is realized
between two branches derived from an Er: fiber comb, amplified separately in Yb: fiber and
Er: fiber amplifiers. Average powers of 6.7 W and 14.9 W are generated in the 2.9 µm idler
and 1.6 µm signal, respectively. With high average power, excellent beam quality, and
passive carrier-envelope phase stabilization, this light source is a promising platform for …

… Abstract: We present a frequency comb with 6.7 W at 2.9 µm with carrier-envelope phase
stable pulses. To our knowledge, this is the highest … We present here a 2.9 µm frequency
comb based on high-power DFG in a two-stage OPA, operating at 100 MHz repetition rate
with 6.7 W average power and 100 fs pulse duration. To our knowledge, this is the highest
power mid-IR optical frequency comb reported to date and among the highest average
power ultrafast mid-IR light sources in general. Furthermore, we highlight that this OPA can …