Doppler-Free Two-Photon Cavity Ring-Down Spectroscopy of a Nitrous Oxide (N${}_2$O) Vibrational Overtone Transition

Gang Zhao, D. Michelle Bailey, Adam J. Fleisher +2

We report Doppler-free two-photon absorption of N${}_2$O at $\lambda$ = 4.53 $\mu$m, measured by cavity ring-down spectroscopy. High power was achieved by optical self-locking of a quantum c…