Comb-Locked Cavity-Ringdown Spectroscopy for Molecular Transition Frequency Measurements below 1×10 12 Relative Uncertainty

摘要

We describe highly accurate molecular line positions determined by a recently developed comb-locked cavity ring-down spectrometer. Molecular transition frequencies near 1.6 μm are determined with relative total uncertainties below 1 × 10^-12 (200 Hz absolute uncertainty).