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Optics Letters

Optics Letters

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  • Vol. 23, Iss. 1 — Jan. 1, 1998
  • pp: 76–78

Exciplex liquid-phase thermometer using time-resolved laser-induced fluorescence

Christian Parigger, David H. Plemmons, Ron J. Litchford, and San-Mou Jeng  »View Author Affiliations


Optics Letters, Vol. 23, Issue 1, pp. 76-78 (1998)
http://dx.doi.org/10.1364/OL.23.000076


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Abstract

Pulsed photoexcitation of hydrocarbon fuels doped with organic molecules exhibits a temperature-dependent fluorescence spectrum that is used as the basis for a weakly intrusive optical thermometer. By use of pulsed excitation from a 308-nm 8-ns XeCl excimer laser with gated detection of the fluorescence emissions from doped n -heptane, we demonstrate that time-resolved measurement of the excited monomer and the redshifted excited-state complex (exciplex) fluorescence emissions can yield sub-1° accuracy for temperatures ranging from 440 K to the vicinity of the critical temperature (540 K). The experiments also show that the exciplex fluorescence spectrum is pressure independent below and above supercritical pressure.

© 1998 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(260.2510) Physical optics : Fluorescence

Citation
Christian Parigger, David H. Plemmons, Ron J. Litchford, and San-Mou Jeng, "Exciplex liquid-phase thermometer using time-resolved laser-induced fluorescence," Opt. Lett. 23, 76-78 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-1-76


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