Slope-assisted Raman distributed optical fiber sensing  

作　　者：JIAN LI XINXIN ZHOU YANG XU LIJUN QIAO JIANZHONG ZHANG MINGJIANG ZHANG 

机构地区：[1]College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China [2]Key Laboratory of Advanced Transducers and Intelligent Control Systems(Ministry of Education and Shanxi Province),Taiyuan University of Technology,Taiyuan 030024,China

出　　处：《Photonics Research》2022年第1期205-213,共9页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61875146,62075151,62075153,62105234);Key R&D Program(high-tech field)of Shanxi Province(201803D121064,201803D31044,201903D121177);Patent Promotion and Exploitation Program of Shanxi Province(20200734);Sanjin Scholar;Shanxi“1331 Project”Key Innovative Research Team;Transformation of Scientific and Technological Achievements Programs of Higher Education Institutions in Shanxi。

摘　　要：Raman distributed optical fiber sensing is required to achieve accurate temperature measurements in a micro-scale area.In this study,we first analyze and demonstrate the pulse transmission feature in the temperature variation area and the superposition characteristics of Raman optical time-domain reflectometry(OTDR)signals by numerical simulation.The equations of superimposed Raman anti-Stokes scattered signals at different stages are presented,providing a theoretical basis for the positioning and physical quantity demodulation of whole optical fiber systems based on the OTDR principle.Moreover,we propose and experimentally demonstrate a slope-assisted sensing principle and scheme in a Raman distributed optical fiber system.To the best our knowledge,this is the first experimental demonstration of Raman distributed optical fiber sensing in a centimeter-level spatial measurement region.

关 键 词：FIBER OPTICAL OTDR 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]