Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
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TLDR
In this paper, the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating was used to discriminate between strain induced and temperature induced wavelength shifts.Abstract:
We demonstrate a novel sensor which uses the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating to discriminate between strain and temperature induced wavelength shifts. Sensor interrogation is performed entirely on the fiber Bragg grating reflection signals. Strain and temperature were simultaneously measured to /spl plusmn/9 /spl mu/strain and /spl plusmn/1.5/spl deg/C over a wide range of conditions.read more
Citations
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Proceedings ArticleDOI
Peritectic Behavior Detection in the Fe-C-Mn-Al-Si Steel System using Fiber Optic Temperature Mapping
Journal ArticleDOI
High Temperature Accurate Monitoring Based on Phase-Shifting Grating and Photoelectric Oscillation
TL;DR: In this paper, a high temperature real-time accurate monitoring system based on photoelectric oscillation had been proposed and demonstrated using the narrow bandwidth characteristics of phase-shifting fiber Bragg grating (PS-FBG).
Proceedings ArticleDOI
Bending characteristics of long-period fiber grating with an over-coupled resonant wavelength
TL;DR: In this paper, a CO2-induced LPG with an over-coupled resonant dip is fabricated and the bending characteristics of proposed LPG are experimentally studied in detail.
Journal ArticleDOI
Simultaneous Measurement of Strain and Temperature Distributions Using Optical Fibers with Different GeO2 and B2O3 Doping
TL;DR: In this paper , the authors focused on the change in sensitivity due to differences in GeO2 and B2O3 doping and verified the accuracy when measuring the strain and temperature distributions simultaneously.
Dissertation
Structural health monitoring of composite materials with FBG sensors: damage detection and remaining useful life prediction
TL;DR: In this article, the authors evaluated the feasibility of fiber optic based sensors for monitoring the state or structural health of the composite materials from manufacturing phase to service phase continuously, and they used ingress/egress technique to embed the fiber optic sensors.
References
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Journal ArticleDOI
Formation of Bragg gratings in optical fibers by a transverse holographic method
G. Meltz,W W Morey,W. H. Glenn +2 more
TL;DR: Bragg gratings have been produced in germanosilicate optical fibers by exposing the core, through the side of the cladding, to a coherent UV two-beam interference pattern with a wavelength selected to lie in the oxygen-vacancy defect band of germania, near 244 nm.
Long-period fiber grating as band-rejection filters
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
Journal ArticleDOI
Long-period fiber gratings as band-rejection filters
Ashish Madhukar Vengsarkar,Paul Joseph Lemaire,J. B. Judkins,Vikram Bhatia,Turan Erdogan,John E. Sipe +5 more
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
Journal ArticleDOI
Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry–Perot wavelength filter
TL;DR: The use of a fiber Fabry–Perot filter for detecting the wavelength shift of a Fiber Bragg grating sensor or network of sensor elements along a common fiber path is described.
Journal ArticleDOI
Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors
TL;DR: In this paper, the spectral properties of two superimposed fiber gratings having different Bragg wavelengths (850 and 1300 nm) with respect to strain and temperature were studied, and it was shown that the ratio of sensitivity at two Bragg wavelength is dependent on strain, which can be used for simultaneous measurement of these parameters.