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

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2019,（7）
• 页码范围: 17-22
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL201917.070602

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℃ to 1.2℃,and the temperature un certainty decreases from 16.8℃ to 2.4℃.Moreover,the double-ended configuration can automatically compensate the local external physics perturbation of the sensing fiber,which exhibits a distinctive improvement.