Chinese Optics Letters, 2019, 17 (7): 070602, Published Online: Jul. 12, 2019
Performance improvement in double-ended RDTS by suppressing the local external physics perturbation and intermodal dispersion Download: 831次
060.2370 Fiber optics sensors 120.5820 Scattering measurements 280.4788 Optical sensing and sensors 290.5860 Scattering, Raman
Abstract
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.
Jian Li, Yang Xu, Mingjiang Zhang, Jianzhong Zhang, Lijun Qiao, Tao Wang. Performance improvement in double-ended RDTS by suppressing the local external physics perturbation and intermodal dispersion[J]. Chinese Optics Letters, 2019, 17(7): 070602.