基于受激布里渊散射的海水温度和盐度同步反演  

Simultaneous Inversion of Seawater Temperature and Salinity Based on Stimulated Brillouin Scattering

作　　者：徐宁 张博 罗宁宁[1,2] 徐进军[1,2] 何兴道[1,2,3] 史久林[1,2,3] Xu Ning;Zhang Bo;Luo Ningning;Xu Jinjun;He Xingdao;Shi Jiulin(Jiangxi Provincial Key Laboratory of OptoElectronic Information Science and Technology,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China;Key Laboratory of Nondestructive Testing(Ministry of Education),Nanchang Hangkong University,Nanchang 330063,Jiangxi,China;National Engineering Laboratory for Nondestructive Testing and Optoelectric Sensing Technology and Application,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China)

机构地区：[1]南昌航空大学江西省光电信息科学与技术重点实验室,江西南昌330063 [2]南昌航空大学无损检测技术教育部重点实验室,江西南昌330063 [3]南昌航空大学无损检测与光电传感技术与应用国家工程实验室,江西南昌330063

出　　处：《光学学报》2022年第24期214-221,共8页Acta Optica Sinica

基　　金：国家自然科学基金(41666004,41776111);国防基础科研计划项目(JCKY2019401D002)。

摘　　要：为实现海水温度和盐度的同步测量,理论和实验研究了受激布里渊散射(SBS)频移和线宽相结合的数据反演方法。理论上根据经验公式,拟合了SBS频移、线宽随温度、盐度的变化关系。实验上测量了不同温度、盐度下海水的SBS频移和线宽,并利用理论反演模型反演分析了海水的温度和盐度。研究结果表明,利用频移和线宽相结合的方法可实现海水温度和盐度的同步反演,温度反演误差的最小值为0.04℃、最大值为0.41℃,盐度反演误差的最小值为0.09‰、最大值为0.65‰。To realize the synchronous measurement of temperature and salinity of seawater, we study a data inversion method by combining frequency shift and line width of stimulated Brillouin scattering(SBS) theoretically and experimentally. Theoretically, the variations of frequency shift and line width of SBS with the changes in temperature and salinity are fitted by empirical formulas. Experimentally, the frequency shift and line width of SBS in seawater with different temperatures and salinity are measured, and then the temperature and salinity of seawater are analyzed by the theoretical inversion model. The results indicate that the simultaneous inversion of seawater temperature and salinity can be realized by the combination of frequency shift and line width of SBS. The minimum and maximum temperature inversion errors are 0. 04 ℃ and 0. 41 ℃, respectively, and the minimum and maximum salinity inversion errors are 0. 09‰and 0. 65‰, respectively.

关 键 词：散射 受激布里渊散射 频移 线宽 温度 盐度 

分 类 号：O433.1[机械工程—光学工程]