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4 March 2019 Hybrid sensor based on microstructured hollow-core fiber for simultaneous measurement of strain and temperature
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Proceedings Volume 10925, Photonic Instrumentation Engineering VI; 109250Z (2019) https://doi.org/10.1117/12.2508288
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
A hybrid sensor based on microstructured hollow core fiber is proposed for the simultaneous measurement of strain and temperature. The fiber, consisting of four silica capillaries with wall thickness of ~1 μm and a cladding with a thickness of ~26 μm, is spliced between two sections of single mode fiber. Using a low arc discharge power to splice the two fibers, a Fabry-Perot interferometer is formed. In this situation, light travels in the hollow core and the behavior of a twowave interferometer is observed. However, when the power of the arc discharge is increased, the structure near the splice area changes, generating new interferometric paths and giving rise to a different spectral response. In this work, sensors with a single degenerated area are analyzed. In such case, both Fabry-Perot and Michelson interferometers are created and different sensitivities to strain and temperature are obtained. The different spectral frequencies are analyzed, enabling the discrimination between the two parameters. For a sensor with a length of ~385 μm, strain sensitivities of 2.46 pm/με and -0.52 pm/με are obtained for the Fabry-Perot and for the Michelson interferometer, respectively. Regarding temperature, a sensitivity of 1.81 pm/°C was attained for the former, whereas for the last the sensitivity was of 42.23 pm/°C. Keywords: Hyb
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. S. Ferreira, J. Bierlich, J. Kobelke, J. L. Pinto, K. Schuster, and K. Wondraczek "Hybrid sensor based on microstructured hollow-core fiber for simultaneous measurement of strain and temperature", Proc. SPIE 10925, Photonic Instrumentation Engineering VI, 109250Z (4 March 2019); doi: 10.1117/12.2508288; https://doi.org/10.1117/12.2508288
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