Long-Range High Spatial Resolution Distributed Temperature and Strain Sensing Based on Optical Frequency-Domain Reflectometry

被引：104

作者：

Song, Jia ^{[1
]}

Li, Wenhai ^{[1
]}

Lu, Ping ^{[1
]}

Xu, Yanping ^{[1
]}

Chen, Liang ^{[1
]}

Bao, Xiaoyi ^{[1
]}

机构：

[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

来源：

IEEE PHOTONICS JOURNAL | 2014年 / 6卷 / 03期

关键词：

Optical fiber sensor; rayleigh scattering; OFDR; SIGNAL;

D O I：

10.1109/JPHOT.2014.2320742

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel approach to realize long-range distributed temperature and strain measurement with high spatial resolution, as well as high temperature and strain resolution, is proposed based on optical frequency-domain reflectometry (OFDR). To maintain the high measurement resolution and accuracy while increasing the sensing length, an optimized nonlinearity compensation algorithm is implemented to ensure a large wavelength tuning range. The compensated OFDR trace exhibits improved sensing resolution at a short distance, and the spatial resolution gradually deteriorates at the far end due to accumulated phase noise induced by fast tuning of the laser wavelength. We demonstrated the spatial resolution of 0.3 mm over a single-mode fiber sensing length of over 300 m, and temperature and strain resolution of 0.7 degrees C and 2.3 mu epsilon with spatial resolution of up to 7 cm, respectively.

引用

页数：8

共 19 条

[1] Suppression of nonlinear frequency sweep in an optical frequency-domain reflectometer by use of Hilbert transformation [J].