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Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 17 — Sep. 1, 2012
  • pp: 3654–3656

Doppler spectrum-based polar nephelometer

Paul L. Kebabian, Timothy B. Onasch, Joda C. Wormhoudt, and Andrew Freedman  »View Author Affiliations

Optics Letters, Vol. 37, Issue 17, pp. 3654-3656 (2012)

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The particle scattering asymmetry parameter of an ensemble of submicrometer particles, as well as the complete scattering phase function (angular distribution), is determined by measuring the Doppler spectrum of the scattered light. No calibration is required. The monitor incorporates a 532 nm laser with long coherence length, an integrating sphere to collect the scattered light, and a heterodyne (interferometric) detection scheme. Measurements of monodisperse polystyrene latex spheres and polydisperse ammonium sulfate particles indicate that the measured value of the asymmetry parameter is generally within ±0.03 of that calculated using Mie theory.

© 2012 Optical Society of America

OCIS Codes
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: May 15, 2012
Revised Manuscript: July 26, 2012
Manuscript Accepted: July 28, 2012
Published: August 28, 2012

Paul L. Kebabian, Timothy B. Onasch, Joda C. Wormhoudt, and Andrew Freedman, "Doppler spectrum-based polar nephelometer," Opt. Lett. 37, 3654-3656 (2012)

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