Publication

Characterization of the response of fibre Bragg grating sensors subjected to a two-dimensional strain field

Hans Georg Limberger, John Botsis, Federico Bosia, Philippe Giaccari
2003
Journal Articles

Abstract

In this paper, the behaviour of fibre Bragg grating sensors subjected to transversal as well as axial strains is characterized, both in the case of low-birefringent and polarization-maintaining single-mode optical fibres. Two configurations are considered. Firstly, diametrical compression is studied and the results compared to those previously obtained in the literature. Secondly, the sensors are embedded in an epoxy specimen and their response monitored when the latter is subjected to biaxial loading. In both cases, the experimental results are compared to those obtained by means of finite-element simulations and an appropriate analytical description of the opto-mechanical response of polarization-maintaining fibres.

Official source

https://infoscience.epfl.ch/entities/publication/9767ab52-7986-4fba-bd9c-93febf32491e

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Hans Georg Limberger, John Botsis, Federico Bosia, Philippe Giaccari
2003
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9767ab52-7986-4fba-bd9c-93febf32491e

About this result

Related concepts (29)

Birefringence

Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with non-cubic crystal structures are often birefringent, as are plastics under mechanical stress.

Infinitesimal strain theory

In continuum mechanics, the infinitesimal strain theory is a mathematical approach to the description of the deformation of a solid body in which the displacements of the material particles are assumed to be much smaller (indeed, infinitesimally smaller) than any relevant dimension of the body; so that its geometry and the constitutive properties of the material (such as density and stiffness) at each point of space can be assumed to be unchanged by the deformation.

Optical fiber

An optical fiber, or optical fibre in Commonwealth English, is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data transfer rates) than electrical cables.

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Characterization of the response of fibre Bragg grating sensors subjected to a two-dimensional strain field

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