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Cavity enhanced magneto-optic rotation: a very sensitive and selective method of detecting paramagnetic species
Conference proceeding

Cavity enhanced magneto-optic rotation: a very sensitive and selective method of detecting paramagnetic species

R.I Billmers, M.F Emig, N.P Cernansky and D.L Miller
Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest (IEEE Cat. No.01CH37170), pp 408-409
2001
DOI: https://doi.org/10.1109/CLEO.2001.947981

Abstract

Atom optics Atomic measurements Combustion Fires Optical sensors Performance evaluation Spectroscopy Temperature control Temperature sensors Zinc
Summary form only given. In intermediate-temperature combustion environments (650<t<800 K) a phenomenon known as the negative temperature coefficient (NTC) region exists whereby the reactivity of the reaction decreases with increasing temperature. At or near NTC, HO/sub 2/ radicals are thought to control the mechanism at intermediate temperatures with OH radicals control the mechanism at higher temperatures. Detection and quantification of these radicals can be achieved using optical spectroscopy at 1.43 /spl mu/m and 3.3 /spl mu/m. This region is very congested. Finding lines due to weakly absorbing radicals is an arduous task unless the radicals are separated from the stable species. This separation is possible optically using a technique involving magneto-optic rotation (MOR). We have recently performed MOR measurements in an acetylene/air flame that was doped with Zn atoms.

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