Performance improvement in double-ended RDTS by suppressing the local external physics perturbation and intermodal dispersion

作     者：Jian Li Yang Xu Mingjiang Zhang Jianzhong Zhang Lijun Qiao Tao Wangh 李健;许扬;张明江;张建忠;乔丽君;王涛

作者机构：Key Laboratory of Advanced Transducers and Intelligent Control SystemMinistry of Education and Shanxi ProvinceTaiyuan 030024China College of Physics&OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2019年第17卷第7期

页      面：17-22页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (NSFC) (Nos. 61527819 and 61875146) the Research Project by Shanxi Scholarship Council of China (Nos. 2016-036 and 2017-052) the Key Science and Technology Research Project Based on Coal of Shanxi Province (No. MQ2014-09) the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi the Program for Sanjin Scholar 

主　　题：Performance improvement double-ended RDTS intermodal dispersion 

摘      要：We propose and experimentally demonstrate a novel Raman-based distributed fiber-optics temperature sensor(RDTS) for improving the temperature measurement accuracy and engineering applicability. The proposed method is based on double-ended demodulation with a reference temperature and dynamic dispersion difference compensation method, which can suppress the effect of local external physics perturbation and intermodal dispersion on temperature demodulation results. Moreover, the system can omit the pre-calibration process by using the reference temperature before the temperature measurement. The experimental results of dispersion compensation indicate that the temperature accuracy optimizes from 5.6°C to 1.2°C, and the temperature uncertainty decreases from 16.8°C to 2.4°C. Moreover, the double-ended configuration can automatically compensate the local external physics perturbation of the sensing fiber, which exhibits a distinctive improvement.