NDLI: The Development of an <inline-formula> <tex-math notation=LaTeX>$Phi $ </tex-math></inline-formula>-OTDR System for Quantitative Vibration Measurement

Content Provider	IEEE Xplore Digital Library
Author	Guojie Tu Xuping Zhang Yixin Zhang Fan Zhu Lan Xia Nakarmi, B.
Copyright Year	1989
Abstract	Phase sensitive optical time domain reflectometry is suitable for vibration detection due to its high sensitivity. However, for conventional amplitude-measuring method, the strain-amplitude relation is nonlinear and the monotonic interval of strain-amplitude transfer function is very small (corresponding to less than 2π phase shift in light duration). Thus, the vibration detection is qualitative and it is difficult to distinguish different kinds of vibrations. In this letter, a quantitative vibration measurement by analyzing the differential phase in the interrogated fiber separation is proposed. A statistics calculating method is present to suppress the uncertainty in phase-measuring. Dynamic strain of 400 nε (peak-to-peak, corresponding to phase shift of 17 rad) was reproduced with high quality by proposed method.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1349
Ending Page	1352
Page Count	4
File Size	1256916
File Format	PDF
ISSN	10411135
Volume Number	27
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-15
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vibrations Strain Optical fiber sensors Optical fibers Optical reflection vibration measurement distributed optical fiber sensor phase-sensitive optical time-domain reflectometry (Φ-OTDR) Distributed optical fiber sensor phase-sensitive optical time-domain reflectometry ( $\Phi $ -OTDR)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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