High-precision measurements of radiocarbon (14C) near or below a fraction modern 14C of
1 (F14C≤ 1) are challenging and costly. An accurate, ultrasensitive linear absorption …

The development of cavity based infrared spectroscopy techniques has proved very
successful, in particular cavity ring-down spectroscopy for sensitive measurements. The …

We report Doppler-free two-photon absorption of N 2 O at λ= 4.53 μ m, measured by cavity
ring-down spectroscopy. High power was achieved by optical self-locking of a quantum …

To mitigate green-house gas (GHG) emissions, governments around the world are enacting
legislation to reduce carbon intensity in transportation fuels. Coprocessing biomass and …

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

Hydrogen cyanide (HCN) is the primary cyanide species in combustion processes and plays
a key role in the formation of NO x in the combustion of fossil fuels, nitrogen-containing …

We report a proof-of-principle demonstration of intracavity pump–probe, cavity ringdown
(CRD) detection in a three-mirror, traveling-wave cavity. With cavity-enhanced pump power …

Cross-sensitivity limits accurate quantitative detection of species concentrations in all sensor
technologies, including laser-based absorption techniques. Absorption sensors capture a …

This paper presents a unique study of the bulk plasma characteristics in a low pressure
inductively coupled nitrogen plasma. Saturated cavity ringdown spectroscopy (sat-CRDS) …

Methyl iodide is a toxic halocarbon with diverse industrial and agricultural applications, and
it is an important ocean-derived trace gas that contributes to the iodine burden of the …