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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 27 — Sep. 20, 2002
  • pp: 5797–5803

Temperature dependence of light absorption in water at holmium and thulium laser wavelengths

Björn I. Lange, Tobias Brendel, and Gereon Hüttmann  »View Author Affiliations


Applied Optics, Vol. 41, Issue 27, pp. 5797-5803 (2002)
http://dx.doi.org/10.1364/AO.41.005797


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Abstract

A simple experimental setup is described that facilitates accurate measurements of the temperature-dependent water absorption coefficient in the mid-infrared spectral region. With this setup, the absorption of holmium and thulium laser radiation in water was quantified to a precision of 0.5%. In the 20–100 °C temperature range, a linear decrease of the absorption coefficient with temperature is observed. The slope coefficients amount to -0.104 ± 0.001 and -0.259 ± 0.003 1/(K cm) for 2090-nm holmium and 2014-nm thulium radiation, respectively. At both wavelengths, this bleaching reduces the absorption coefficients of water at 100 °C by one third when compared with room temperature. A numerical simulation shows that the variable absorption has a noticeable influence on peak temperatures in laser heating of water.

© 2002 Optical Society of America

OCIS Codes
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(300.1030) Spectroscopy : Absorption
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: November 20, 2001
Revised Manuscript: April 29, 2002
Published: September 20, 2002

Citation
Björn I. Lange, Tobias Brendel, and Gereon Hüttmann, "Temperature dependence of light absorption in water at holmium and thulium laser wavelengths," Appl. Opt. 41, 5797-5803 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-27-5797

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