Bend sensing by measuring the resonance splitting of long-period fiber gratings

Liu, Y.; Zhang, Lin; Williams, J.A.R.; Bennion, I.

doi:10.1016/s0030-4018(01)01236-6

Cited by 32 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore the splitting will not be affected by (to first order) crosssensitivity to temperature, strain and RI changes [68]. Under temperature drift, the wavelength-distance between the two dips will not change (to first order), only the absolute wavelength of both dips will change [69]. Therefore the absolute wavelength shift can be interrogated for bend/curvature measurements and the splitting can be utilized for temperature compensating.…”

Section: Bend Sensorsmentioning

confidence: 99%

“…Dip 1 is the original transmission dip and dip 2 is the new dip. [18] In the literature the splitting has in several papers [69][70][71] been explained by stating that the fibre-curvature breaks the degeneracy of the cladding modes that are normally coupled to in the straight fibre. These non-degenerate modes, with power concentrated on opposite sides of the fibre core, then propagate with different speeds due to the difference in longitudinal strain above and below the fibre axis.…”

Section: Bend Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Drug-Induced T-Wave Morphology Changesn

Shakibfar¹

2014

Drug-Induced T-Wave Morphology Changes

View full text Add to dashboard Cite

Section: Bend Sensorsmentioning

confidence: 99%

Section: Bend Sensorsmentioning

confidence: 99%

Drug-Induced T-Wave Morphology Changesn

Shakibfar¹

2014

Drug-Induced T-Wave Morphology Changes

View full text Add to dashboard Cite

“…Several papers [61][62][63] have explained the splitting by stating that the fiber-curvature breaks the degeneracy of the cladding modes that are normally coupled to in the straight fiber. These nondegenerate modes, with power concentrated on opposite sides of the fiber core, then propagate with different speeds due to the difference in longitudinal strain above and below the fiber axis.…”

Section: Long-period Gratings As Bend Sensorsmentioning

confidence: 99%

Fiber-optical grating sensors for wind turbine blades: a review

Glavind¹,

Olesen²,

Skipper³

et al. 2013

Opt. Eng

View full text Add to dashboard Cite

Abstract. With the rapid growth of wind turbines and focus on maintenance costs structural measurements are becoming essential. Fiberoptical sensors have physical properties that make them suitable for embedding in wind turbine blades, such as small size and immunity to electrical interferences. Fiber-optical grating sensors can be utilized to provide important information regarding strain, temperature, and curvature of the blades, which can be applied in condition-monitoring to detect fatigue failure and furthermore for optimization of the production from the wind turbine. We provide an overview of the current status and a discussion on research and implementation of fiber Bragg gratings and long-period gratings in wind turbine blade sensors. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

“…6 It splits the cladding modes of Bragg grating. 7 At the same time, bending of optical fiber is required in many sensing applications. 8 No doubt bending cannot be avoided in the real long-span telecommunications optical systems.…”

Section: Introductionmentioning

confidence: 99%

Method for the radial profiling of material dispersion of optical fibers due to mechanically induced optical anisotropy

El-Diasty

Abdel-Wahab

2006

Opt. Eng

View full text Add to dashboard Cite

Multiple-beam Fizeau fringes are applied to study the effect of pure mechanical bending on some of single-mode optical fiber parameters. The induced birefringence and the associated radial refractive index profiles are measured as a function of fringe shift in case of very sharp radii of curvature. For the first time, the measured variation in index profiles incorporation with the minimum variance technique are employed to study some important parameters such as the oscillation energy, dispersion energy, and lattice energy profiles of the fiber cladding material predicting their radial variation with bending. The material dispersion profiles are specified as a function of the evaluated variations of the radial profiles of the oscillation and dispersion energies, respectively. The presented method provides an accurate study of the fiber parameters and their variations due to external effects, avoiding at the same time the complications of the dispersion measurements. Microinterferograms are given for demonstration. © 2006 Society of Photo-Optical Instrumentation Engineers.

show abstract

Bend sensing by measuring the resonance splitting of long-period fiber gratings

Cited by 32 publications

References 6 publications

Drug-Induced T-Wave Morphology Changesn

Drug-Induced T-Wave Morphology Changesn

Fiber-optical grating sensors for wind turbine blades: a review

Method for the radial profiling of material dispersion of optical fibers due to mechanically induced optical anisotropy

Contact Info

Product

Resources

About