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Optical Engineering

Research on simultaneous measurement of ocean temperature and salinity using Brillouin shift and linewidth
Author(s): Kun Liang; Yong Ma; Yin Yu; Jun Huang; Hao Li
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Paper Abstract

The Brillouin backscattered signal of LIDAR can be used in remote sensing of ocean parameters such as temperature. Current methods for measuring ocean temperature are based on the monotropic function between Brillouin shift and ocean temperature, while the effect of the ocean salinity, which influences the measurement of temperature, is neglected. However, the variations in salinity will also lead to nonignorable change of the temperature. Neglecting it will result in an inaccurate measurement of temperature. We first propose a new model that takes both Brillouin shift and linewidth as independent variables, and then establish the multi-valued equations of these variables and ocean parameters. With a data fitting procedure the ocean temperature and salinity can be measured simultaneously. The accuracy of this model and the uncertainty of the measurement are analyzed. Theoretical and experimental analysis showed that the ocean temperature and salinity can be simultaneously obtained by measured Brillouin frequency shift and linewidth.

Paper Details

Date Published: 6 June 2012
PDF: 10 pages
Opt. Eng. 51(6) 066002 doi: 10.1117/1.OE.51.6.066002
Published in: Optical Engineering Volume 51, Issue 6
Show Author Affiliations
Kun Liang, Huazhong Univ. of Science and Technology (China)
Yong Ma, Huazhong Univ. of Science and Technology (China)
Yin Yu, Huazhong Univ. of Science and Technology (China)
Jun Huang, Huazhong Univ. of Science and Technology (China)
Hao Li, Huazhong Univ. of Science and Technology (China)


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