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Proceedings Paper

Laser-based optical fiber array fluorosensor for marine applications
Author(s): Robert G. Milne; Daniel McStay; Patricia M. Pollard; J. Dunn
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Paper Abstract

A recently developed Argon laser based system, deploying an optical fiber array of 12 silica fiber sensors each 75 m in length, with a core diameter of 200 micrometers, capable of giving real time measurements of marine phytoplankton populations of 0.1 micrograms/l is reported. The laser light is amplitude modulated and a phase sensitive detection system is used. A series of sea trials in the North Sea were conducted on board the Royal Research Vessel 'Challenger' during May 1995, to demonstrate the reliability of the system under extreme weather conditions, and that the system was capable of giving realtime fluorescence measurements. Initial tests using Fluorescein dye for calibration purposes were carried out in the laboratory. Results from the laboratory and sea trials have shown that the system is relatively insensitive to down-welling light, has long term stability and does not suffer from fouling. Also the results obtained from the laser system are generally in good agreement with results obtained by conventional phytoplankton sampling methods, giving confidence in the validity of the realtime data from the laser system.

Paper Details

Date Published: 25 March 1996
PDF: 8 pages
Proc. SPIE 2705, Fluorescence Detection IV, (25 March 1996); doi: 10.1117/12.236193
Show Author Affiliations
Robert G. Milne, Robert Gordon Univ. (United Kingdom)
Daniel McStay, Robert Gordon Univ. (United Kingdom)
Patricia M. Pollard, Robert Gordon Univ. (United Kingdom)
J. Dunn, Scottish Office Agriculture and Fisheries Dept./Marine Lab. Aberdeen (United Kingdom)


Published in SPIE Proceedings Vol. 2705:
Fluorescence Detection IV
E. Roland Menzel; Abraham Katzir, Editor(s)

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