项目名称： 基于偏振优化光频域反射技术的分布式光纤传感机理研究

项目编号： No.61475114

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 刘琨

作者单位： 天津大学

项目金额： 82万元

中文摘要： 本项目针对超长距离光纤海缆监测等重大需求，对基于偏振优化光频域反射技术(P-OFDR)的光纤瑞利散射分布式传感机理进行深入研究，着眼于传感机理、理论模型、解调机制等基础科学问题的解决和机理创新。通过本课题的研究，拟解决这种新型分布式光纤传感技术中的关键科学问题，主要包括噪声产生机制及其抑制、偏振优化及偏振信息提取、基于光频域反射技术的瑞利散射传感机制及提取等。这些科学问题的解决，有助于实现光纤中瑞利散射信息与外界扰动之间相互作用耦合机理方面的理论创新，拟将建立P-OFDR的完整理论模型、信号模型以及噪声模型。并利用基于P-OFDR的瑞利散射提取方法，实现多参量（温度、应力/应变、振动）、长距离（>150km)、高空间分辨率(<1m)全分布式传感。

中文关键词： 光纤传感技术；分布式；光频域反射；偏振控制；瑞利散射

英文摘要： Aiming at the great requirement of long length submarine fiber cable monitoring and so on, this project will devote to the research of Rayleigh scattering distributed sensing mechanism based on polarization optimized optical frequency domain reflectometry (P-OFDR) technology, and focus on the solution of scientific problems and mechanism innovation including sensing principle, theoretical model and demodulation mechanism. Through the study of the project, it is proposed to solve the key scientific problems in this new type of distributed optical fiber sensing technology, including noise generation mechanism and suppression, polarization optimization and polarization information extraction, the mechanism and extraction between Rayleigh scattering and the external disturbance based on P-OFDR. By solving these scientific problems, we will complete the theoretical innovation of interaction coupling mechanism and physical processes between Rayleigh scattering and the external disturbance, by establishing the whole theoretical model including signal model and noise model of P-OFDR. And based on the P-ODFR system and Rayleigh scattering extract algorithm, it will be realized that multiple parameters (temperature, stress / strain, vibration) are implemented by all-fiber sensing experiments with long-distance of more than 150 km, high spatial resolution of less than 1 m.

英文关键词： fiber sensing technique;distributed;optical frequency reflection;polarization control;Rayleigh scattering