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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 9 — Mar. 19, 2004
  • pp: 1856–1862

Mid-infrared laser-induced superheating of water and its quantification by an optical temperature probe

Tobias Brendel and Ralf Brinkmann  »View Author Affiliations


Applied Optics, Vol. 43, Issue 9, pp. 1856-1862 (2004)
http://dx.doi.org/10.1364/AO.43.001856


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Abstract

Free-running thulium laser pulses (Cr:Tm:YAG, λ = 2.01 μm, t p = 300 μs) were applied to a purified, degassed water sample and the resulting temperature rise was investigated by an optical temperature probe. The probe detected water reflectance index changes with temperature and also the onset of vaporization, which was found to occur in a superheat regime, at approximately 230 °C. The experimental data were compared with theoretical temperature calculations, and deviations of less than 20 °C were stated. The best agreement between theory and experiment was found for temperatures below 180 °C, defining by this the method’s high accuracy limit. In conclusion, both the optical temperature probe and the presented calculations can help to improve dosimetry in pulsed IR laser applications by precise temperature measurement and prediction.

© 2004 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(120.1880) Instrumentation, measurement, and metrology : Detection
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.1020) Medical optics and biotechnology : Ablation of tissue
(300.1030) Spectroscopy : Absorption
(350.5340) Other areas of optics : Photothermal effects

History
Original Manuscript: July 12, 2003
Revised Manuscript: December 1, 2003
Published: March 20, 2004

Citation
Tobias Brendel and Ralf Brinkmann, "Mid-infrared laser-induced superheating of water and its quantification by an optical temperature probe," Appl. Opt. 43, 1856-1862 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-9-1856

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