Frequency-Stabilized Mid-infrared Laser Source for Precision Spectroscopy
Precision measurements on molecules in the strong fundamental bands are of great importance.An ac-curate mid-infrared light source is a key for these studies.By locking the signal and pump light to an optical frequency comb,a high-precision continu-ous-wave optical parametric oscillator source is built,and the mid-infrared frequency drift is deter-mined to be less than 1 kHz.As a demonstration,saturated absorption spectroscopy of the R(14)(00011)-(00001)line of 13CO2 is measured,and the transition frequency is determined to be 68786813496(29)kHz.The frequency-stabilized mid-infrared laser source provides an opportunity for precision measurements of molecules in fun-damental bands.
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