Affiliation:
1. JILA, National Institute of Standards and Technology (NIST) and University of Colorado, and Department of Physics, University of Colorado, Boulder, CO 80309-0440, USA.
Abstract
We demonstrate highly efficient cavity ringdown spectroscopy in which a broad-bandwidth optical frequency comb is coherently coupled to a high-finesse optical cavity that acts as the sample chamber. 125,000 optical comb components, each coupled into a specific longitudinal cavity mode, undergo ringdown decays when the cavity input is shut off. Sensitive intracavity absorption information is simultaneously available across 100 nanometers in the visible and near-infrared spectral regions. Real-time, quantitative measurements were made of the trace presence, the transition strengths and linewidths, and the population redistributions due to collisions and the temperature changes for molecules such as C
2
H
2
, O
2
, H
2
O, and NH
3
.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
435 articles.
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