Q1. What are the contributions in this paper?
A fibre optic sensor capable of discriminating between temperature and strain, using a single fibre Bragg grating, is presented.
Temperature and strain discrimination using a single tilted fibre Bragg grating
Reads0
Chats0
TLDR
In this article, the core and cladding modes exhibit different thermal sensivities, while the strain sensivities are approximately equal, while monitoring the core-core mode coupling resonance and the corecladding modes coupling resonance of the TFBG spectrum allows the separation of the temperature and strain induced wavelength shifts.About:
This article is published in Optics Communications.The article was published on 2007-07-15 and is currently open access. It has received 130 citations till now. The article focuses on the topics: Fiber Bragg grating & Cladding mode.read more
Figures
Figure 3 (a) strain and (b) temperature sensitivity of the resonance features of a TFBG with tilt angle 1.5º, fabricated in hydrogen loaded boron-germanium co-doped optical fibre of cut off wavelength 1213 nm. ♦ (red): core-core (Bragg) mode resonance and ■ (blue): core-cladding mode resonance. The lines are best fits to data points. 
Figure 1. Schematic diagram of a TFBG. grating period, and blaze angle. Dashed arrows represent the forward propagating core mode. 
Figure 2 (a) reflection and (b) transmission spectra of a TFBG with tilt angle 1.5º, fabricated in hydrogen loaded boron-germanium co-doped optical fibre of cut off wavelength 1213 nm.
Citations
More filters
Journal ArticleDOI
Tilted fiber Bragg grating sensors
TL;DR: In this paper, a tilt of the grating fringes causes coupling of the optical power from the core mode into a multitude of cladding modes, each with its own wavevector and mode field shape.
Journal ArticleDOI
Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications.
TL;DR: Recent research and applications in structural health monitoring of composite aircraft structures using FOS have been critically reviewed, considering both the multi-point and distributed sensing techniques.
Journal ArticleDOI
Fiber Bragg grating sensors toward structural health monitoring in composite materials: challenges and solutions.
TL;DR: The main challenges arising from the use of FBGs in composite materials are reviewed, with a focus on issues related to temperature-strain discrimination, demodulation of the amplitude spectrum during and after the curing process as well as connection between the embedded optical fibers and the surroundings.
Journal ArticleDOI
Strain measurements of composite laminates with embedded fibre Bragg gratings : criticism and opportunities for research
TL;DR: A monitoring scheme is introduced which shows the different steps necessary to relate the output of an embedded FBG to the strain of the structure in which it is embedded, and temperature compensation methods which should not be ignored in terms of in-situ measurement of strains with fibre Bragg gratings.
Journal ArticleDOI
Simultaneous measurement for strain and temperature using fiber Bragg gratings and multimode fibers
TL;DR: An all-fiber sensor capable of simultaneous measurement of temperature and strain is newly presented, and can be used to improve the strain and temperature resolution by suitably choosing the multimode fiber.
References
More filters
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
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
Tilted fiber phase gratings
Turan Erdogan,John E. Sipe +1 more
TL;DR: In this paper, a detailed theoretical treatment of the effects of grating tilt on the spectral characteristics of a tilted optical-fiber phase grating is presented, compared with experimentally measured spectra of strong gratings.
Journal ArticleDOI
Simultaneous independent temperature and strain measurement using in-fibre Bragg grating sensors
TL;DR: In this article, two Bragg gratings with closely spaced center wavelengths are written either side of a splice between two fibres of different diameter, showing similar temperature sensitivities but different strain responses to an applied stress.
Tilted short-period fibre-Bragg-grating-induced coupling to cladding modes for accurate refractometry
TL;DR: In this paper, the authors investigate the changes in the transmission spectrum of long period fibre gratings and tilted short-period fibre Bragg gratings versus the refractive index of the surrounding medium.