Dual-comb spectroscopy with tailored spectral broadening in Si${}_3$N${}_4$ nanophotonics

Esther Baumann, Eli V. Hoenig, Edgar F. Perez +10

Si${}_3$N${}_4$ waveguides, pumped at 1550 nm, can provide spectrally smooth, broadband light for gas spectroscopy in the important 2 $\mu$m to 2.5 $\mu$m atmospheric wat…