Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
Reads0
Chats0
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
More filters
Proceedings ArticleDOI
High-sensitivity cryogenic temperature sensors using pressurized fiber Bragg gratings
Meng-Chou Wu,Stanton L. DeHaven +1 more
TL;DR: In this article, the authors used a pressurized fiber Bragg grating (PFBG) to measure the temperature of room temperature to liquid helium temperature and found that the PFBG has a total Bragg wavelength shift of about 470 pm, 10 times more than the regular FBG.
Journal ArticleDOI
Dynamic interrogation for optical fibre sensors based on long-period gratings
TL;DR: An electrical dynamic interrogation technique for long-period grating sensors relying on the modulation of fibre Bragg gratings located in the readout unit that attenuates the effect of the 1/f noise of the photodetection, amplification and processing electronics on the sensing head resolution is reported in this paper.
Journal ArticleDOI
Sensitivity measurement of fibre bragg grating sensor
TL;DR: In this paper, a pass-through type fibre Bragg grating (FBG) temperature sensor system has been designed, developed, simulated, and experimentally investigated in harsh environments exposed under direct sunlight, rain, and wind.
Journal ArticleDOI
In-series singlemode thin-core diameter fibres for simultaneous temperature and strain measurement
Jie Shi,Shilin Xiao,Meihua Bi +2 more
TL;DR: In this paper, a fiber optic sensor capable of simultaneous measurement of temperature and strain is proposed and experimentally demonstrated, where the sensor head is formed by cascading two sections of singlemode thin-core diameter fibres that act as two different inter-modal interferometers (IMIs).
Proceedings ArticleDOI
Temperature stabilization of fiber Bragg grating vibration sensor
TL;DR: In this paper, a temperature-stabilized fiber-Bragg-grating (FBG) vibration sensor consisting of a broad-spectrum light and two FBGs (one is for sensing and other for an optical source) is examined.
References
More filters
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.