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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 36 — Dec. 20, 2009
  • pp: 6990–6999

Absorption and scattering of 1.06 μm laser radiation from oceanic aerosols

Richard Fischer, Antonio Ting, Gregory DiComo, John Prosser, Joseph Peñano, Bahman Hafizi, and Phillip Sprangle  »View Author Affiliations


Applied Optics, Vol. 48, Issue 36, pp. 6990-6999 (2009)
http://dx.doi.org/10.1364/AO.48.006990


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Abstract

The absorption and scattering of oceanic aerosols are characterized using low- and high-power lasers in the near IR ( 1.064 μm ). The imaginary part of the refractive index of sea salt inferred from low-power absorption measurements is 200 × less than the commonly accepted value from the literature. The measured absorption coefficients of natural and artificial saltwater are within 5% of the absorption of pure water ( 0.14 cm 1 ). High-power aerosol experiments are consistent with low-power liquid absorption measurements, which yield comparable absorption coefficients for pure water and saltwater. High-power illumination of test aerosols ( Cu SO 4 · 5 H 2 O ) with an absorption coefficient α 0.19 cm 1 and a dwell time of 100 ms results in a consistent reduction in scattering from the aerosol column. The high-power laser scattering measurements are in good agreement with the theory, which accounts for the absorption, heating, and vaporization of the water-based aerosols. The measured absorption of oceanic aerosols in the laboratory is much less than the literature values at 1.064 μm and should result in reduced heating and thermal blooming in open ocean atmospheres.

© 2009 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.7340) Atmospheric and oceanic optics : Water
(290.1090) Scattering : Aerosol and cloud effects
(290.2200) Scattering : Extinction
(290.3030) Scattering : Index measurements

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: February 18, 2009
Revised Manuscript: August 13, 2009
Manuscript Accepted: September 29, 2009
Published: December 14, 2009

Citation
Richard Fischer, Antonio Ting, Gregory DiComo, John Prosser, Joseph Peñano, Bahman Hafizi, and Phillip Sprangle, "Absorption and scattering of 1.06 μm laser radiation from oceanic aerosols," Appl. Opt. 48, 6990-6999 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-36-6990


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