Real-time optical fiber sensing of phytoplankton for studies in size distribution, concentration, and biomass

Robert Kai-Yiu Chan; Ce Chen; S. K. Cheng

doi:10.1117/12.221757

29 September 1995 Real-time optical fiber sensing of phytoplankton for studies in size distribution, concentration, and biomass

Robert Kai-Yiu Chan, Ce Chen, S. K. Cheng

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Proceedings Volume 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII; (1995) https://doi.org/10.1117/12.221757
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

An optical fiber laser-doppler system has ben developed to detect both the laser-induced- fluorescence (LIF) signal and the laser doppler signal of phytoplankton traversing through a measurement volume. From the two measurement, the size distribution, concentration, biomass, and the amount of chlorophyll present can be determined. Our apparatus have demonstrated successfully that it can resolve distinctly the size distribution of two species of phytoplankton (Chlorella and Scenedesmus). For phytoplankton, these two species do not have mark differences in size, one being less than 10 micrometers while the other is approximately 25 micrometers , and yet our measurement gave very satisfactory results. The result obtained clearly indicates that our optical system can produce accurate and liable size measurement and is suitable to be further develop into a practical in situ field instrument.

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Robert Kai-Yiu Chan, Ce Chen, and S. K. Cheng "Real-time optical fiber sensing of phytoplankton for studies in size distribution, concentration, and biomass", Proc. SPIE 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII, (29 September 1995); https://doi.org/10.1117/12.221757

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KEYWORDS

Signal processing

Doppler effect

Particles

Signal detection

Optical fibers

Laser induced fluorescence

Laser scattering

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