Phytoplankton monitoring by laser induced fluorescence

This paper describes some laboratory experiments carried out on different microalgae species, which were irradiated at different visible wavelengths, in order to optimize the excitation wavelength for fluorescence lidar operation in field. As excitation sources, an Ar+ cw and a He-Ne cw lasers were used. The fluorescence spectra were detected with a resolution of about 1nm. The different algae species showed different spectral signatures, allowing their identification. finally, some results on fluorescence behaviour of a light -stressed degrading sample are presented and discussed.