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25 March 1996 Laser-based optical fiber array fluorosensor for marine applications
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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.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert G. Milne, Daniel McStay, Patricia M. Pollard, and J. Dunn "Laser-based optical fiber array fluorosensor for marine applications", Proc. SPIE 2705, Fluorescence Detection IV, (25 March 1996);


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