
TY  - JOUR
A1  - Shorten, Richard A. 
A1  - He, Yabai 
A1  - Orr, Brian J. 
T1  - Swept-Cavity Ringdown Absorption Spectroscopy: Put Your Laser Light In and Shake It All About
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 2003
VL  - 56
IS  - 3
SP  - 219
EP  - 231
KW  - 
UR  - https://doi.org/10.1071/CH02220 
N2  - Cavity ringdown (CRD) absorption spectroscopy with continuous-wave (cw) tunable coherent light sources provides a convenient, sensitive, and precise way to measure very weak optical absorption spectra and to analyze trace gas concentrations. Several recently introduced innovations in cw-CRD spectroscopy are described. Our approach involves one or more single-mode tunable diode laser sources, a rapidly swept ringdown cavity, and a simple optical heterodyne detected approach (based on the dynamics of coherent light reflected from such an active optical cavity). This offers high performance in a relatively simple, low-cost, compact instrument that is facilitated by fibre optic and other standard photonics or telecommunications components. New experimental results are reported, comprising CRD spectra of water vapour in the 0.815 &#181;m wavelength region and of mixtures of CO2 and CO in the range of 1.56&#8211;1.59 &#181;m. Promising applications of such techniques include chemical analysis of trace gases in medicine, agriculture, industry, and the environment. 
ER  -

