Optical-Optical Double-Resonance Spectroscopy of Methane Using a Cavity-Enhanced Comb Probe
Résumé
We implement a cavity to enhance the absorption of a frequency comb probe in a double-resonance measurement of sub-Doppler 3?3 ? ?3 methane transitions. This yields two orders of magnitude better sensitivity in 15 times shorter acquisition time compared to previous work using a single-pass cell. © 2021 OSA.