Distributed vibration sensing with high frequency response by using WDM based integrated scheme

被引：14
|
作者：
Sun, Zhenshi [1 ,2 ]
Liu, Kun [1 ,2 ,3 ]
Jiang, Junfeng [1 ,2 ,3 ]
Ma, Pengfei [1 ,2 ]
Wang, Shuang [1 ,2 ,3 ]
Xu, Zhongyuan [1 ,2 ]
Guo, Hairuo [1 ,2 ]
Zhou, Zichun [1 ,2 ]
Xu, Tianhua [1 ,2 ,3 ]
Liu, Tiegen [1 ,2 ,3 ]
机构：
[1] Tianjin Univ, Sch Precis Instruments & Opto Elect Engn, Tianjin 300072, Peoples R China
[2] Minist Educ, Key Lab Opto Elect Informat Technol, Tianjin 300072, Peoples R China
[3] Tianjin Univ, Inst Opt Fiber Sensing, Tianjin Opt Fiber Sensing Engn Ctr, Tianjin 300072, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2020年 / 53卷 / 15期
关键词：
optical fiber; vibration sensing; high frequency; integrated structure; FIBER-OPTIC SENSORS; SYSTEM; OTDR;
D O I：
10.1088/1361-6463/ab6bee
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Distributed vibration sensing measurement with high frequency response is still a challenging task in distributed optical fiber vibration sensing systems. In this paper, a WDM based integrated scheme is proposed to directly demodulate the high frequency vibration signal with high spatial resolution by merging the phase sensitive optical time-domain reflectometry and the Sagnac interferometer. A maximum frequency response of similar to 2.5 MHz and a spatial resolution of 20 m have been achieved in a 4 km sensing fiber link. Comparison to conventional sensing structure, the proposed scheme shows great application potential in the field of distributed vibration sensing system.
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收藏
页数：7
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