Saturated Cavity Ring-Down Spectroscopy of 12C16O2 near 1.57 μm
We present the saturated absorption spectroscopy of the 30012←00001 band of 12C16O2 by a comb-locked cav-ity ring-down spectrometer near 1.57 μm.Positions of 37 lines with rota-tional quantum numbers up to 68 were determined with an accuracy of a few kHz.Comparisons of the ro-vibrational energy levels determined in this work with the Doppler-limited experimental values from literature and those from the CDSD2019 databank are given.De-viations exceeding 1 MHz were observed in the transitions blended by other carbon dioxide isotopologues.
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