Brillouin scattering spectrum for liquid detection and applications in oceanography  

作　　者：Yuanqing Wang Jinghao Zhang Yongchao Zheng Yangrui Xu Jiaqi Xu Jiao Jiao Yun Su Hai-Feng Lü Kun Liang 

机构地区：[1]School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,China [2]Beijing Institute of Space Mechanics and Electricity,Beijing 100076,China [3]School of Physics and School of Aeronautics and Astronautics,University of Electronic Science and Technology of China,Chengdu 610054,China [4]State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics,Tsinghua University,Beijing 100084,China

出　　处：《Opto-Electronic Advances》2023年第1期39-48,共10页光电进展（英文）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 62175072, No. 62175072 and No. 12074209);the Open Project of State Key Laboratory of Low-Dimensional Quantum Physics (Grant No. KF202008);support from International Postdoctoral Exchange Fellowship Program (Talent-Introduction Program)。

摘　　要：The Brillouin scattering spectrum has been used to investigate the properties of a liquid medium.Here,we propose an improved method based on the double-edge technique to obtain the Brillouin spectrum of a liquid.We calculated the transmission ratios and deduced the Brillouin shift and linewidth to construct the Brillouin spectrum by extracting the Brillouin edge signal through filtered double-edge data.We built a detection system to test the performance of this method and measured the Brillouin spectrum for distilled water at different temperatures and compared it with the theoretical prediction.The observed difference between the experimental and theoretical values for Brillouin shift and linewidth is less than 4.3 MHz and 3.2 MHz,respectively.Moreover,based on the double-edge technique,the accuracy of the extracted temperatures and salinity is approximately 0.1°C and 0.5‰,respectively,indicating significant potential for application in water detection and oceanography.

关 键 词：Brillouin scattering spectrum double-edge technique TEMPERATURE SALINITY OCEANOGRAPHY 

分 类 号：TN2[电子电信—物理电子学]