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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 23 — Nov. 12, 2007
  • pp: 15493–15499

Fluorescence ratio thermometry in a microfluidic dual-beam laser trap

Susanne Ebert, Kort Travis, Bryan Lincoln, and Jochen Guck  »View Author Affiliations


Optics Express, Vol. 15, Issue 23, pp. 15493-15499 (2007)
http://dx.doi.org/10.1364/OE.15.015493


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Abstract

The dual-beam laser trap is a versatile tool with many possible applications. In order to characterize its thermal properties in a microfluidic trap geometry we have developed a non-intrusive fluorescence ratio technique using the temperature sensitive dye Rhodamine B and the temperature independent reference dye Rhodamine 110. We measured temperature distribution profiles in the trap with submicron spatial resolution on a confocal laser-scanning microscope. The maximum heating in the center of the trap amounts to (13 ± 2) °C/W for a wavelength of λ = 1064 nm and scales linearly with the applied power. The measurements correspond well with simulated temperature distributions.

© 2007 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.6780) Instrumentation, measurement, and metrology : Temperature
(140.6810) Lasers and laser optics : Thermal effects
(140.7010) Lasers and laser optics : Laser trapping
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: January 24, 2007
Revised Manuscript: October 29, 2007
Manuscript Accepted: October 29, 2007
Published: November 7, 2007

Virtual Issues
Vol. 2, Iss. 12 Virtual Journal for Biomedical Optics

Citation
Susanne Ebert, Kort Travis, Bryan Lincoln, and Jochen Guck, "Fluorescence ratio thermometry in a microfluidic dual-beam laser trap," Opt. Express 15, 15493-15499 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-23-15493


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