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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 20 — Jul. 10, 2009
  • pp: 4049–4055

Determination of velocity of self-mobile phytoplankton using a self-mixing thin-slice solid-state laser

Seiichi Sudo, Takayuki Ohtomo, Yohei Takahashi, Tomohiko Oishi, and Kenju Otsuka  »View Author Affiliations


Applied Optics, Vol. 48, Issue 20, pp. 4049-4055 (2009)
http://dx.doi.org/10.1364/AO.48.004049


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Abstract

We present an analysis of the shoulder-shaped power spectrum observed in the modulated laser output due to feedback light scattered from dynamic changes in self-mobile phytoplankton with flagella in seawater performed using a self-mixing laser Doppler vibrometry system. The power spectrum occasionally has shoulder-shaped broad frequency components superimposed on a Lorentz-type spectrum. This reflects the translational motion of phytoplankton moving across the beam-focus area. The velocity of phytoplankton in the focus area can be obtained by applying a curve fitting procedure to the power spectrum. Moreover, the average velocity and the velocity distribution of phytoplankton can be determined from curve fitting of the long-term power spectrum.

© 2009 Optical Society of America

OCIS Codes
(280.7250) Remote sensing and sensors : Velocimetry
(280.1415) Remote sensing and sensors : Biological sensing and sensors

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: April 28, 2009
Manuscript Accepted: June 24, 2009
Published: July 9, 2009

Virtual Issues
Vol. 4, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Seiichi Sudo, Takayuki Ohtomo, Yohei Takahashi, Tomohiko Oishi, and Kenju Otsuka, "Determination of velocity of self-mobile phytoplankton using a self-mixing thin-slice solid-state laser," Appl. Opt. 48, 4049-4055 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-20-4049

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