Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber

Kun Wang; Yosuke Mizuno; Xingchen Dong; Wolfgang Kurz; Maximilian Fink; Martin Jakobi; Alexander W. Koch

doi:10.35848/1347-4065/ac74fe

Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber

Kun Wang, Yosuke Mizuno, Xingchen Dong, Wolfgang Kurz, Maximilian Fink, Martin Jakobi, Alexander W. Koch

Chair of Measurement Systems and Sensor Technology

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A strain-insensitive high-sensitivity temperature sensor based on multimode interference in a specialty fiber with a square core is developed and experimentally investigated. A 25 cm long square-core fiber is used as a multimode fiber (MMF) of a single-mode-multimode-single-mode structure and the temperature dependence of its transmitted spectrum is measured while the strain is applied continually from 0 to 500 μϵ with steps of 100 μϵ. The mean temperature sensitivity is -22.35 pm °C-1, which is ∼3.5 times higher than that of a standard MMF, and it is almost independent of strain with a small standard deviation of 0.44 pm °C-1.

Original language	English
Article number	078002
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	61
Issue number	7
DOIs	https://doi.org/10.35848/1347-4065/ac74fe
State	Published - 1 Jul 2022

Keywords

Multimode interference
Optical fiber sensor
SMS
Square-core fiber
Strain-insensitive
Temperature sensing

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10.35848/1347-4065/ac74fe

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title = "Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber",

abstract = "A strain-insensitive high-sensitivity temperature sensor based on multimode interference in a specialty fiber with a square core is developed and experimentally investigated. A 25 cm long square-core fiber is used as a multimode fiber (MMF) of a single-mode-multimode-single-mode structure and the temperature dependence of its transmitted spectrum is measured while the strain is applied continually from 0 to 500 μϵ with steps of 100 μϵ. The mean temperature sensitivity is -22.35 pm °C-1, which is ∼3.5 times higher than that of a standard MMF, and it is almost independent of strain with a small standard deviation of 0.44 pm °C-1.",

keywords = "Multimode interference, Optical fiber sensor, SMS, Square-core fiber, Strain-insensitive, Temperature sensing",

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T1 - Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber

AU - Wang, Kun

AU - Mizuno, Yosuke

AU - Dong, Xingchen

AU - Kurz, Wolfgang

AU - Fink, Maximilian

AU - Jakobi, Martin

AU - Koch, Alexander W.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - A strain-insensitive high-sensitivity temperature sensor based on multimode interference in a specialty fiber with a square core is developed and experimentally investigated. A 25 cm long square-core fiber is used as a multimode fiber (MMF) of a single-mode-multimode-single-mode structure and the temperature dependence of its transmitted spectrum is measured while the strain is applied continually from 0 to 500 μϵ with steps of 100 μϵ. The mean temperature sensitivity is -22.35 pm °C-1, which is ∼3.5 times higher than that of a standard MMF, and it is almost independent of strain with a small standard deviation of 0.44 pm °C-1.

AB - A strain-insensitive high-sensitivity temperature sensor based on multimode interference in a specialty fiber with a square core is developed and experimentally investigated. A 25 cm long square-core fiber is used as a multimode fiber (MMF) of a single-mode-multimode-single-mode structure and the temperature dependence of its transmitted spectrum is measured while the strain is applied continually from 0 to 500 μϵ with steps of 100 μϵ. The mean temperature sensitivity is -22.35 pm °C-1, which is ∼3.5 times higher than that of a standard MMF, and it is almost independent of strain with a small standard deviation of 0.44 pm °C-1.

KW - Multimode interference

KW - Optical fiber sensor

KW - SMS

KW - Square-core fiber

KW - Strain-insensitive

KW - Temperature sensing

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Strain-insensitive high-sensitivity temperature sensing based on multimode interference in a square-core fiber

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Keywords

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