Strain-optic coefficients of individual cladding modes of singlemode fibre: theory and experiment

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Strain-optic coefficients of individual cladding modes of singlemode fibre: theory and experiment

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The different strain-optic coefficients for the effective indices of the core and cladding modes of a standard telecom singlemode fibre are measured by stretching a fibre in which a 4°-tilted fibre Bragg grating has been written. The origin of the modal dependence of the strain-optic coefficient differences is analysed and discussed. Good agreement between theoretical and experimental values of these coefficients is reported.

Inspec keywords: piezo-optical effects; optical fibre theory; Bragg gratings; optical fibre cladding

Other keywords: cladding modes; strain-optic coefficients; core modes; tilted fibre Bragg grating; single mode fibre; strain sensitivity

Subjects: Gratings, echelles; Fibre optics; Optical fibre fabrication, cladding, splicing, joining

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