Simultaneous and quasi-independent strain and temperature sensor based on microstructured optical fiber

A. Lopez-Aldaba; J.-L. Auguste; R. Jamier; P. Roy; M. Lopez-Amo

doi:10.1117/12.2265052

23 April 2017 Simultaneous and quasi-independent strain and temperature sensor based on microstructured optical fiber

A. Lopez-Aldaba, J.-L. Auguste, R. Jamier, P. Roy, M. Lopez-Amo

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103233I (2017) https://doi.org/10.1117/12.2265052
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

In this paper, a new sensor system for simultaneous and quasi-independent strain and temperature measurements is presented. The interrogation of the sensing head has been carried out by monitoring the FFT phase variations of two of the microstructured optical fiber (MOF) cavity interference frequencies. This method is independent of the signal amplitude and also avoids the need to track the wavelength evolution in the spectrum, which can be a handicap when there are multiple interference frequency components with different sensitivities. The sensor is operated within a range of temperature of 30°C-75°C, and 380με of maximum strain were applied; being the sensitivities achieved of 127.5pm/°C and -19.1pm/με respectively. Because the system uses an optical interrogator as unique active element, the system presents a cost-effective feature.

Citation Download Citation

A. Lopez-Aldaba, J.-L. Auguste, R. Jamier, P. Roy, and M. Lopez-Amo "Simultaneous and quasi-independent strain and temperature sensor based on microstructured optical fiber", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103233I (23 April 2017); https://doi.org/10.1117/12.2265052

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