Generation of Kerr combs centered at 4.5μm in crystalline microresonators pumped by quantum cascade lasers

Anatoliy A. Savchenkov, Vladimir. S. Ilchenko, Fabio Di Teodoro +4

We report on the generation of mid-infrared Kerr frequency combs in high-finesse CaF${}_2$ and MgF${}_2$ whispering-gallery mode resonators pumped with continuous wave room temperature…