Fig. 3
From: Silicon-chip-based mid-infrared dual-comb spectroscopy
Characterization of dual-comb source. a Spectra for each modelocked comb (red, black). Combined M-FT spectrum (blue). b RF spectrum from the dual-comb interferometer. Plot shows RF spectra for dual-comb (blue), each separate modelocked comb (black and red), and detector noise background (dark cyan). Inset: Characterization of the 25th RF beatnote in b
