Temporal aspects of fluorescence: in-situ analysis with a bistatic submarine lidar

Uwe Stute; Michel Le Haitre; Olga Lado-Bordowsky

doi:10.1117/12.458453

28 February 2002 Temporal aspects of fluorescence: in-situ analysis with a bistatic submarine lidar

Uwe Stute, Michel Le Haitre, Olga Lado-Bordowsky

Proceedings Volume 4678, Eighth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; (2002) https://doi.org/10.1117/12.458453
Event: Eighth Joint International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2001, Irkutsk, Russian Federation

Abstract

For a long time fluorescence techniques have provided interesting information in oceanography. Lidar (LIght Detection And Ranging) has been used to have fast profiling tools over several meters especially in high dynamic water masses. While fluosensors provide the fluorescence response to a well defined excitation in a small volume, remote sensing operates over several meters and their power to excite fluorescence at a range R depends on optical properties of the medium during the light propagation. In order to study the influence of the propagation properties of the aquatic medium on spectra from fluorescence Lidar a new ranging concept was realized. The presented study is focused on the bistatic design of Lidar combined with a spectral analysis of the backscattered signal for tomoscopic applications. The data were obtained with a frequency doubled Nd:YAG ((lambda) equals 532 nm) and a gated angular resolved detection. While the time base of the system can be compared to ranging by other on-axis Lidar, the spatial dimension of the signal brings complementary information of the light flux distribution as a function of the angle of incidence. The bistatic configuration of this Lidar permits geometrical ranging by a set of detection channels, detecting simultaneously the spectrum (532 nm - 720 nm) with the same system time base. The analysis of fluorescence by the bistatic angular resolved detection is focused on the temporal aspects of fluorescence in near field data of this Lidar. First sea trials with this Lidar have shown the potential for the investigation of fluorescence profiles even in very turbid estuaries.

Citation Download Citation

Uwe Stute, Michel Le Haitre, and Olga Lado-Bordowsky "Temporal aspects of fluorescence: in-situ analysis with a bistatic submarine lidar", Proc. SPIE 4678, Eighth International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, (28 February 2002); https://doi.org/10.1117/12.458453

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