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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 14 — May. 10, 2005
  • pp: 2818–2826

Submicrosecond temperature measurement in liquid water with laser-induced thermal acoustics

David W. Alderfer, G. C. Herring, Paul M. Danehy, Toshiharu Mizukaki, and Kazuyoshi Takayama  »View Author Affiliations


Applied Optics, Vol. 44, Issue 14, pp. 2818-2826 (2005)
http://dx.doi.org/10.1364/AO.44.002818


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Abstract

Using laser-induced thermal acoustics, we demonstrate nonintrusive and remote sound-speed and temperature measurements in liquid water. Unsteady thermal gradients in the water sample produce fast, random laser beam misalignments, which are the primary source of uncertainty in these measurements. For water temperatures over the range 10 °C to 45 °C, the precision of a single 300-ns-duration measurement varies from ±1 to ±16.5 m/s for sound speed and from ±0.3 °C to ±9.5 °C for temperature. Averaging over 10 s (100 laser pulses) yields accuracies of ±0.64 m/s and ±0.45 °C for sound speed and temperature, respectively.

© 2005 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(120.6780) Instrumentation, measurement, and metrology : Temperature
(290.5900) Scattering : Scattering, stimulated Brillouin
(300.2570) Spectroscopy : Four-wave mixing

Citation
David W. Alderfer, G. C. Herring, Paul M. Danehy, Toshiharu Mizukaki, and Kazuyoshi Takayama, "Submicrosecond temperature measurement in liquid water with laser-induced thermal acoustics," Appl. Opt. 44, 2818-2826 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-14-2818

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