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Open AccessArticle
System Design of Ocean Temperature Measurement System Using Brillouin Lidar Based on Dual Iodine Cells
by
Fu Yang
Fu Yang 1,
Wenhao Chen
Wenhao Chen 1,2,
Luqiang Liang
Luqiang Liang 1,
Chunqi Fang
Chunqi Fang 3 and
Yan He
Yan He 4,*
1
College of Science, Donghua University, Shanghai 201620, China
2
Avic Shanghai Aviation Electric Co., Ltd., Shanghai 201101, China
3
Nanjing Institute of Advanced Laser Technology, Nanjing 210038, China
4
Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2024, 16(15), 2748; https://doi.org/10.3390/rs16152748 (registering DOI)
Submission received: 10 May 2024
/
Revised: 19 July 2024
/
Accepted: 23 July 2024
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Published: 27 July 2024
Abstract
Ocean temperature profile information plays a key role in understanding the marine environment. The passive remote-sensing technique can provide sea surface temperature measurements over large areas. However, it is sensitive to the atmospheric environment and cannot provide seawater temperature profile information. The lidar technique is the only way to carry out seawater temperature profile measurements over large areas. However, it is insufficient for measuring speed, the receiving field, stability, spectral integrity, simple system structures, and so on. Therefore, we propose a Brillouin lidar method combining two iodine cells at different temperatures to realize temperature measurements, where one iodine cell is used as a filter to absorb the elastic scattering and the other as an edge detection discriminator to obtain the seawater temperature measurement. The system has a fast measurement speed, a large receiving field, a simple system structure, and high stability. The system feasibility was verified via principle simulation and real iodine absorption curve measurements. For an ocean temperature of [5 °C, 15 °C], a laser wavelength of 532.10495 nm was more appropriate, corresponding to the iodine pool temperature combinations of 50 °C and 78 °C. For an ocean temperature of [15 °C, 32 °C], a laser wavelength of 532.10518 nm was more appropriate, corresponding to the iodine cell temperature combinations of 60 °C and 78 °C. When the laser intensity reached a measurement precision of 1‰, the temperature could be predicted with an accuracy of up to 0.2 K. This work shows promise as a potential solution for seawater temperature profile measurement.
Share and Cite
MDPI and ACS Style
Yang, F.; Chen, W.; Liang, L.; Fang, C.; He, Y.
System Design of Ocean Temperature Measurement System Using Brillouin Lidar Based on Dual Iodine Cells. Remote Sens. 2024, 16, 2748.
https://doi.org/10.3390/rs16152748
AMA Style
Yang F, Chen W, Liang L, Fang C, He Y.
System Design of Ocean Temperature Measurement System Using Brillouin Lidar Based on Dual Iodine Cells. Remote Sensing. 2024; 16(15):2748.
https://doi.org/10.3390/rs16152748
Chicago/Turabian Style
Yang, Fu, Wenhao Chen, Luqiang Liang, Chunqi Fang, and Yan He.
2024. "System Design of Ocean Temperature Measurement System Using Brillouin Lidar Based on Dual Iodine Cells" Remote Sensing 16, no. 15: 2748.
https://doi.org/10.3390/rs16152748
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