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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 24 — Aug. 20, 2007
  • pp: 6142–6150

Optical properties of micrometer size water droplets studied by cavity ringdown spectroscopy

S. Rudić, R. E. H. Miles, A. J. Orr-Ewing, and J. P. Reid  »View Author Affiliations


Applied Optics, Vol. 46, Issue 24, pp. 6142-6150 (2007)
http://dx.doi.org/10.1364/AO.46.006142


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Abstract

Optical extinction by homogeneous, pure water droplets of 30 to 70 μ m diameter produced by a vibrating orifice aerosol generator has been studied by pulsed cavity ringdown (CRD) spectroscopy at λ = 560   nm under ambient conditions. Experimental sensitivity of better than 1% achieved in measurements of CRD times enabled detection of changes in laser light losses per pass due to changes in the number and size of particles within the laser beam volume. By systematically changing the droplet size in the cavity while recording the CRD time, a periodic modulation in the value of the loss per pass was observed. The modulation is caused by the oscillatory nature of the extinction efficiency, which was subsequently inferred and compared with the results of theoretical calculations based on Mie theory.

© 2007 Optical Society of America

OCIS Codes
(010.1100) Atmospheric and oceanic optics : Aerosol detection
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(290.4020) Scattering : Mie theory
(300.6360) Spectroscopy : Spectroscopy, laser

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: May 14, 2007
Manuscript Accepted: June 25, 2007
Published: August 14, 2007

Citation
S. Rudić, R. E. H. Miles, A. J. Orr-Ewing, and J. P. Reid, "Optical properties of micrometer size water droplets studied by cavity ringdown spectroscopy," Appl. Opt. 46, 6142-6150 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-24-6142


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