Structural bending sensor with temperature insensitivity based on a single polarization fiber

Min-Seok Yoon; Oh-Jang Kwon; Hyun-Joo Kim; Suho Chu; Young-Geun Han

doi:10.1117/12.884457

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17 May 2011 Structural bending sensor with temperature insensitivity based on a single polarization fiber

Min-Seok Yoon, Oh-Jang Kwon, Hyun-Joo Kim, Suho Chu, Young-Geun Han

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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77535D (2011) https://doi.org/10.1117/12.884457
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

We propose the temperature-insensitive bending sensor based on a hole-assisted single polarization fiber (SPF). Without fiber grating structures, the SPF-based sensing probe can provide the sensing technique to measure the bending change. If bending is applied to the SPF, two cutoff wavelengths are shifted to shorter wavelengths and the transmission power is diminished because the structural deformation of the SPF induced by bending changes birefringence depending on principle axes of the SPF. However, the applied temperature variation has no effect on the birefringence change severely and two cutoff wavelengths are not shifted by changing temperature. Therefore, the proposed SPF-based sensing probe with temperature insensitivity can measure the bending change effectively.

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Min-Seok Yoon, Oh-Jang Kwon, Hyun-Joo Kim, Suho Chu, and Young-Geun Han "Structural bending sensor with temperature insensitivity based on a single polarization fiber", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77535D (17 May 2011); https://doi.org/10.1117/12.884457

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