Journal ArticleDOI
Simultaneous strain and temperature measurement with long-period gratings.
TLDR
The differential modulation of the attenuation bands in a long-period grating is used for simultaneous sensing of axial strain and temperature in a grating fabricated in a conventional optical fiber.Abstract:
The differential modulation of the attenuation bands in a long-period grating is used for simultaneous sensing of axial strain and temperature. A grating fabricated in a conventional optical fiber is demonstrated for concurrent measurements of strain over a range of 2100 µ∊ and temperature over a range of 125 °C, with maximum errors of 58 µ∊ and 1 °C, respectively.read more
Citations
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Journal ArticleDOI
Optical fibre long-period grating sensors: characteristics and application
Stephen W. James,Ralph P. Tatam +1 more
TL;DR: In this paper, the authors reviewed recent research on fiber optic long-period gratings (LPGs) with emphasis placed upon the characteristics of LPGs that make them attractive for applications in sensing strain, temperature, bend radius and external index of refraction.
Journal ArticleDOI
In-fibre Bragg grating sensors
TL;DR: In-fibre Bragg grating (FBG) sensors are one of the most exciting developments in the field of optical fiber sensors in recent years as discussed by the authors, and significant progress has been made in applications to strain and temperature measurements.
Journal ArticleDOI
Strain and temperature sensor using a combination of polymer and silica fibre Bragg gratings
TL;DR: In this article, a sensor scheme consisting of a combination of a polymer fibre Bragg grating and a silica fibre grating was proposed for temperature and strain discrimination. But it was not shown to provide a large sensitivity and dynamic range.
Journal ArticleDOI
Simultaneous temperature and bend sensing with long-period fiber gratings
TL;DR: Long-period gratings written in commercially available boron-codoped fibers operating at wavelengths of <1.1mum are shown to exhibit high temperature and bending sensitivities, and each resonant attenuation band of such LPG's was observed to split in two to allow for simultaneous measurement ofTemperature and bending in smart-structure applications.
Journal ArticleDOI
Simultaneous strain and temperature measurement using a single fibre Bragg grating
TL;DR: In this paper, a new scheme for simultaneous strain and temperature measurement using a single fibre Bragg grating was proposed, which was written on the splice joint between two fibres and has two Bragg wavelengths, which show the same strain dependence but different temperature response and hence can be used for strain/temperature discrimination.
References
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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
Optical fiber long-period grating sensors.
TL;DR: A novel class of highly sensitive sensors based on long-period fiber gratings that can be implemented with simple and inexpensive demodulation schemes are presented.
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.
Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
TL;DR: 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.