By reducing both the internal and translational temperature of any species down to a few
kelvins, the buffer-gas-cooling (BGC) technique has the potential to dramatically improve the …

This article provides an overview of laser-based absorption spectroscopy applications and
discusses the parameter space and requirements of laser systems for each of these …

Using cavity ring-down spectroscopy to probe R-branch transitions of CO in N 2, we show
that the spectral core of the line shapes associated with the first few rotational quantum …

Abstract Lamb-dips of R (0), R (2) and P (2) rovibrational transitions in the (2-0) overtone
band of the HD molecule are measured at cryogenic temperatures using the technique of …

The high-detection-sensitivity saturated-absorption cavity ring-down (SCAR) technique is
extended to Lamb-dip spectroscopy of rovibrational molecular transitions in the near …

Accurate spectroscopic data of carbon dioxide are widely used in many important
applications, such as carbon monitoring missions. Here, we present comb-locked cavity ring …

Dispersion spectroscopy based on frequency measurement of the high finesse optical cavity
mode shifts induced by the presence of a gas medium with absorption resonances is an …

We present an original opto-mechanical scheme which, effectively coupling a Lamb-dip
saturated-absorption cavity ring-down spectrometer to a buffer-gas-cooling (BGC) source …

The saturated absorption spectrum of the hyperfineless S (0) quadrupole line in the (2-0)
band of H2 is measured at λ= 1189 nm, using the NICE-OHMS technique under cryogenic …

This thesis presents significant advancements in precision spectroscopy of molecular
hydrogen (H₂) and its isotopologues HD and HT by implementing Noise-Immune Cavity …