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Atmospheric and Ocean Optics

Research on simultaneous measurement of ocean temperature and salinity using Brillouin shift and linewidth

[+] Author Affiliations
Kun Liang

Huazhong University of Science and Technology, Department of Electronics and Information Engineering, Wuhan 430074, China

Yong Ma

Huazhong University of Science and Technology, Department of Electronics and Information Engineering, Wuhan 430074, China

Yin Yu

Huazhong University of Science and Technology, Department of Electronics and Information Engineering, Wuhan 430074, China

Jun Huang

Huazhong University of Science and Technology, Department of Electronics and Information Engineering, Wuhan 430074, China

Hao Li

Huazhong University of Science and Technology, Department of Electronics and Information Engineering, Wuhan 430074, China

Opt. Eng. 51(6), 066002 (Jun 06, 2012). doi:10.1117/1.OE.51.6.066002
History: Received March 1, 2012; Revised April 23, 2012; Accepted April 25, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Kun Liang ; Yong Ma ; Yin Yu ; Jun Huang and Hao Li
"Research on simultaneous measurement of ocean temperature and salinity using Brillouin shift and linewidth", Opt. Eng. 51(6), 066002 (Jun 06, 2012). ; http://dx.doi.org/10.1117/1.OE.51.6.066002


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