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Updated: Jul 16, 2026

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
Published on: September 30, 2019
Simultaneous temperature and strain measurements performed by a step-changed arc-induced long-period fiber grating
Gaspar Rego1, Rosane Falate, Oleg Ivanov
1Escola Superior de Tecnologia e Gestão, Avenida do Atlântico, 4900-348 Viana do Castelo, Portugal.
Abstract:
A compact sensor based on step-changed arc-induced long-period fiber gratings was implemented to discriminate between temperature and strain. The proposed sensor consists of a single long-period grating with two sections written consecutively in the SMF-28 fiber using the electric arc discharge technique. The two sections have the same period but different fabrication parameters. The operation of the sensor relies on the existence of a difference between the values of temperature and strain sensitivity of two neighboring resonances observed in the spectrum of the step-changed grating. The temperature and strain resolutions obtained for the sensor are 0.2 degrees C and 35 micro epsilon, respectively.
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