Author:
Hjältén Adrian,de Oliveira Vinicius Silva,Silander Isak,Rosina Andrea,Rutkowski Lucile,Soboń Grzegorz,Lehmann Kevin K.,Foltynowicz Aleksandra
Abstract
We use optical-optical double-resonance spectroscopy with a high-power continuous wave pump and a cavity-enhanced comb probe to expand sub-Doppler measurements of the 3ν3←ν3 band of CH4 to higher rotational levels. We assign the final states using combination differences, i.e., by reaching the same state using different pump/probe combinations.