Cavity-ring-down Doppler-broadening primary thermometry

Cavity ring-down spectroscopy measurements of sub-Doppler hyperfine structure

D. A. Long,1 D. K. Havey,2 M. Okumura,1 C. E. Miller,3 and J. T. Hodges2 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA 2Process Measurements Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, USA 3Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Gr...

Cavity Ring-down Biosensing

Cavity ring-down spectroscopy (CRDS) is an established technique for gases sensing that is newly emerging in the field of optical biosensing. This approach measures changes in the rate of decay of light injected into an optical resonator and relates them to optical loss along its length. This principle has recently been adapted for use in liquids, providing a highly sensitive method for quantit...

Cavity-locked ring-down spectroscopy

Saturated-absorption cavity ring-down spectroscopy.

We report on a novel approach to cavity ring-down spectroscopy with the sample gas in saturated-absorption regime. This technique allows us to decouple and simultaneously retrieve the empty-cavity background and absorption signal, by means of a theoretical model that we developed and tested. The high sensitivity and frequency precision for spectroscopic applications are exploited to measure, fo...

An Introduction to Cavity Ring-Down Spectroscopy

Spectroscopy, the study of the interaction of light (electromagnetic radiation) and matter, is the most ubiquitous and precise method available to the physical scientist. Especially for isolated atoms, molecules, and small clusters, it has no peer. It is used to elucidate the structure and dynamics of quantum systems from atomic nuclei to natural proteins. Essentially everything we know about t...