Fully stabilized dual-comb spectrometer based on a mid-IR quantum-cascade-laser frequency comb

Optical frequency combs act as rulers in the frequency domain [1]. They have opened new avenues for many fields such as fundamental time metrology, spectroscopy as well as frequency synthesis. To widen their applications, realizing a compact mid-IR spectrometer using frequency combs is of paramount importance, as the fundamental roto-vibrational bands of most light molecules lie on this spectral region.