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.

引用

页数：7

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