NDLI: Temperature-independent strain sensor system using a tilted fiber Bragg grating demodulator

Content Provider	IEEE Xplore Digital Library
Author	Sung Chul Kang Se Yoon Kim Sang Bae Lee Seo Won Kwon Sang Sam Choi Byoungho Lee
Copyright Year	1989
Abstract	We experimentally demonstrate a new approach for the demodulation of a fiber Bragg grating (FBG) strain sensor by combining a tilted FBG demodulator with a temperature-independent property and a dual head FBG sensor with a temperature-discriminating property. This technique guarantees a stable measurement independent of temperature perturbation at both sides of sensor and demodulator without any additional temperature-isolation or temperature-referencing process and has the minimum resolvable strain of 10 /spl mu/strain. The ranges of operating temperature at the sensor and at the demodulator which guarantee a dynamic range of 1800 /spl mu/strain corresponding to the wavelength difference 2.2 nm between two notches of the tilted FBG spectrum are from room temperature to 180/spl deg/C and 140/spl deg/C, respectively.
Sponsorship	IEEE Lasers and Electro-Optics Society
Starting Page	1461
Ending Page	1463
Page Count	3
File Size	76173
File Format	PDF
ISSN	10411135
Volume Number	10
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitive sensors Sensor systems Optical fiber sensors Temperature sensors Demodulation Fiber gratings Bragg gratings Strain measurement Temperature measurement Temperature distribution
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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