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Applied Optics

Applied Optics


  • Vol. 39, Iss. 19 — Jul. 1, 2000
  • pp: 3396–3407

Measurement of localized heating in the focus of an optical trap

Peter M. Celliers and Jérôme Conia  »View Author Affiliations

Applied Optics, Vol. 39, Issue 19, pp. 3396-3407 (2000)

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Localized heating in the focus of an optical trap operating in water can result in a temperature rise of several kelvins. We present spatially resolved measurements of the refractive-index distribution induced by the localized heating produced in an optical trap and infer the temperature distribution. We have determined a peak temperature rise in water of 4 K in the focus of a 985-nm-wavelength 55-mW laser beam. The localized heating is directly proportional to power and the absorption coefficient. The temperature distribution is in excellent agreement with a model based on the heat equation.

© 2000 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation

Original Manuscript: December 13, 1999
Revised Manuscript: March 20, 2000
Published: July 1, 2000

Peter M. Celliers and Jérôme Conia, "Measurement of localized heating in the focus of an optical trap," Appl. Opt. 39, 3396-3407 (2000)

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