Optical fiber strain sensor with high and tunable sensitivity

We demonstrate a fiber-optic strain sensor with high and tunable sensitivity by constructing a Fabry–Perot interferometer with tunable stretching length. By improving the ratio of stretching length to interference length for the proposed sensor, the measured strain sensitivity is up to 1932 pm/με, w...

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Veröffentlicht in:Review of scientific instruments 2023-11, Vol.94 (11)
Hauptverfasser: Yang, Shiwei, Zhang, Qiang, Li, Xiaobo, Wang, Quansen, Li, Yongmin
Format: Artikel
Sprache:eng
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Zusammenfassung:We demonstrate a fiber-optic strain sensor with high and tunable sensitivity by constructing a Fabry–Perot interferometer with tunable stretching length. By improving the ratio of stretching length to interference length for the proposed sensor, the measured strain sensitivity is up to 1932 pm/με, which is an order of magnitude higher than the maximum value of reported fiber-optic strain sensors so far. The sensitivity for a prepared sensor could be also tuned conveniently by changing the stretching length, and experimental results show that the sensitivity could be tuned from 1932 to 978 pm/με by reducing the stretching length from 12 to 6 mm. Furthermore, the proposed device is economical, straightforward, robust, and reproducible. The advantages make the proposed device promising in practical applications.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0154895