Cavity ringdown spectroscopy at 2 $\mu$m wavelength assisted by a comb-locked optical parametric oscillator

Vittorio D'Agostino, Eugenio Fasci, Muhammad Asad Khan +3

We report on a comb-locked cavity ring-down spectrometer developed for high-precision molecular spectroscopy at 2 $\mu$m. It is based on the use of an external-cavity diode laser tha…