Conjugating precision and acquisition time in a Doppler broadening regime by interleaved frequency-agile rapid-scanning cavity ring-down spectroscopy
We propose a novel approach to cavity-ring-down-spectroscopy (CRDS) in which spectra
acquired with a frequency-agile rapid-scanning (FARS) scheme, ie, with a laser sideband
stepped across the modes of a high-finesse cavity, are interleaved with one another by a
sub-millisecond readjustment of the cavity length. This brings to time acquisitions below 20 s
for few-GHz-wide spectra composed of a very high number of spectral points, typically 3200.
Thanks to the signal-to-noise ratio easily in excess of 10 000, each FARS-CRDS spectrum is …
acquired with a frequency-agile rapid-scanning (FARS) scheme, ie, with a laser sideband
stepped across the modes of a high-finesse cavity, are interleaved with one another by a
sub-millisecond readjustment of the cavity length. This brings to time acquisitions below 20 s
for few-GHz-wide spectra composed of a very high number of spectral points, typically 3200.
Thanks to the signal-to-noise ratio easily in excess of 10 000, each FARS-CRDS spectrum is …
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