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High sensitivity, low temperature-crosstalk strain sensor based on a microsphere embedded Fabry- Perot interferometer

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posted on 2020-06-10, 13:16 authored by Ke Tian, Meng Zhang, Jibo Yu, Yuxuan Jiang, Haiyan Zhao, Xin Wang, Dejun Liu, Guoyong Jin, Elfed LewisElfed Lewis, Gerald Farrell, Pengfei Wang
In this article, a high sensitivity, low temperature-crosstalk strain sensor based on a microsphere embedded Fabry–Perot interferometer (FPI) is reported and experimentally demonstrated. The sensor is fabricated by embedding a microsphere inside a tapered hollow-core fiber (HCF) whose ends are enclosed by two standard single-mode fibers (SMFs). The reflections occurring at the SMF/HCF interface and the surfaces of the microsphere, result in a three-beam interference. The cavity length of the formed FPI can be flexibly changed by controlling the diameter of the tapered HCF and the size of the embedded microsphere, and the maximum extinction ratio (ER) of the reflection spectrum is greater than 11 dB. This novel microsphere embedded FPI structure significantly enhances the sensing performance of traditional FPIs for strain measurement, providing a high strain sensitivity of 16.2 pm/με with a resolution of 1.3 με. Moreover, it is demonstrated that this strain sensor has a very low temperature-strain cross-sensitivity of 0.086 με/oC, which greatly enhances the potential for applications in the field of precision strain measurement

History

Publication

Sensors and Actuators A: Physical;310, 112048

Publisher

Elsevier

Note

peer-reviewed The full text of this article will not be available in ULIR until the embargo expires on the 15/05/2022

Other Funding information

National Natural Science Foundation of China, SFI

Rights

This is the author’s version of a work that was accepted for publication in Sensors and Actuators A.Physical Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Sensors and Actuators A Physical, 310, 112048 2020, High sensitivity, low temperature-crosstalk strain sensor based on a microsphere embedded Fabry- Perot, https://doi.org/10.1016/j.sna.2020.112048

Language

English

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