物理学报Issue(8)：083302-1-083302-5,5.DOI:10.7498/aps.63.083302
相干瑞利散射海水水下温度测量技术的理论研究
Theoretical study on measuring underwater temp erature based on coherent Rayleigh scattering
摘要
Abstract
The rapid measuring of the underwater temperature on a large scale is very important for marine monitoring, and it has vital significances in the civilian and military fields. In this paper, a new coherent Rayleigh scattering method to measure underwater temperature is presented. A wide-band photodetector is used to receive the heterodyne signal combined by the local oscillator laser and water Rayleigh backscattering light, and the water Rayleigh scattering spectrum can be acquired by transform analysis, then the water temperature can be obtained. Firstly, theoretical study and simulation are made on the basic principles of measuring underwater temperature based on Rayleigh scattering. Secondly, theoretical analysis and simulation are made on how to measure water Rayleigh scattering spectrum using coherent detection. Finally, the water temperature measurement accuracy based on Rayleigh scattering is analyzed, showing that for 1 MHz measurement accuracy of Rayleigh scattering spectrum half-width, about 0.35 K temperature measurement accuracy can be achieved.关键词
水下温度/瑞利散射/相干探测Key words
underwater temperature/Rayleigh scattering/coherent detection引用本文复制引用
任秀云,田兆硕,杨敏,孙兰君,付石友..相干瑞利散射海水水下温度测量技术的理论研究[J].物理学报,2014,(8):083302-1-083302-5,5.基金项目
国家自然科学基金(批准号:41306092)、山东省自然科学基金(批准号：ZR2013DQ026)、山东省科技攻关(批准号:2011GHY11514)和中央高校基本科研业务费(批准号：HIT.NSRIF.2013139)资助的课题.@@@@ Project supported by the National Natural Science Foundation of China (Grant No.41306092), the Natural Science Founda-tion of Shandong Province, China (Grant No. ZR2013DQ026), the Science and Technology Planning of Shandong Province, China (Grant No.2011GHY11514), and the Fundamental Research Fund for the Central Universities, China (Grant No. HIT.NSRIF.2013139) （批准号:41306092）
