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Applied Optics

Applied Optics


  • Vol. 43, Iss. 17 — Jun. 10, 2004
  • pp: 3523–3529

Temperature measurements of single droplets by use of laser-induced phosphorescence

Alaa Omrane, Greger Juhlin, Frederik Ossler, and Marcus Aldén  »View Author Affiliations

Applied Optics, Vol. 43, Issue 17, pp. 3523-3529 (2004)

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A novel technique for measuring droplet temperatures has been demonstrated. Laser-induced phosphorescence from thermographic phosphors, seeded to distilled water and iso-octane, was used to measure temperatures of single falling droplets. The phosphors were excited by the fourth and third harmonics of a Nd:YAG laser. The subsequent emission was evaluated by spectral and temporal investigations of the thermographic phosphors Mg4FGeO6:Mn and La2O2S:Eu, respectively. The spectral and the temporal methods permitted temperature measurements of free-falling droplets up to 433 K. Results from both methods, which show an estimated accuracy of better than 1%, are presented.

© 2004 Optical Society of America

OCIS Codes
(120.6780) Instrumentation, measurement, and metrology : Temperature
(160.2540) Materials : Fluorescent and luminescent materials
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

Original Manuscript: August 7, 2003
Revised Manuscript: January 2, 2004
Published: June 10, 2004

Alaa Omrane, Greger Juhlin, Frederik Ossler, and Marcus Aldén, "Temperature measurements of single droplets by use of laser-induced phosphorescence," Appl. Opt. 43, 3523-3529 (2004)

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