Range Elongation of Distributed Discrimination of Strain and Temperature in Brillouin Optical Correlation-Domain Analysis Based on Dual Frequency Modulations

被引：24

作者：

Zou, Weiwen ^{[1
]}

He, Zuyuan ^{[1
]}

Hotate, Kazuo ^{[2
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Adv Opt Commun Syst & Networks, Dept Elect Engn, Shanghai 200240, Peoples R China

[2] Univ Tokyo, Dept Elect Engn & Informat Syst, Tokyo 1130033, Japan

来源：

IEEE SENSORS JOURNAL | 2014年 / 14卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Brillouin fiber-optic sensor; strain-temperature discrimination; distributed sensing; POLARIZATION-MAINTAINING FIBER; ORDER SPATIAL-RESOLUTION; DYNAMIC GRATING SPECTRUM; SCATTERING; BIREFRINGENCE;

D O I：

10.1109/JSEN.2013.2282639

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 scheme of dual frequency modulations are proposed for one-laser Brillouin optical correlation-domain distributed discrimination of strain and temperature. A lower frequency modulation is additionally applied to the laser source, which is originally modulated by a higher one for distributed generation and detection of Brillouin dynamic grating. This scheme can suppress the unwanted correlation peaks due to the higher frequency modulation so as to elongate the measurement range with keeping the high spatial resolution. In this experiment, the measurement range is increased from similar to 5 to 34 m with the spatial resolution maintained to be 10 cm.

引用

页码：244 / 248

页数：5

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