Strain-insensitive and high temperature fiber sensor based on a Mach–Zehnder modal interferometer

Cao, Zhang; Zhang, Zhao; Ji, Xiaochun; Shui, Tao; Wang, Rui; Yin, Chenchen; Zhen, Shenglai; Lü, Liang; Yu, Benli

doi:10.1016/j.yofte.2013.11.003

Cited by 29 publications

(10 citation statements)

References 9 publications

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“…The dependence on the NA of the MMF 3. The dependence on the length of the MMF This detailed study also shows that the strain sensitivity is relatively small and thus has the potential to develop strain-insensitive temperature sensors with standard MMFs instead of specialty fibers, such as small-core photosensitive fiber [19] and seven-core fiber [20]. According to this study, the strain-insensitive temperature fiber sensor based on MMI implementing standard MMF is verified experimentally.…”

Section: Introductionmentioning

confidence: 72%

Fiber-optic multimode interference sensing: comprehensive characterization and its potential for strain-insensitive temperature sensing

Wang¹,

Mizuno²,

Dong³

et al. 2022

Preprint

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A strain-insensitive temperature sensor based on multimode interference using standard multimode fibers (MMFs) is proposed according to the comprehensive study of the characteristics of the MMFs. The temperature and strain dependences on the core diameter, numerical aperture (NA), and the length of the MMF section in the single-mode-multimodesingle-mode (SMS) fiber structure are investigated experimentally. The results indicate that the larger core diameter of the MMF leads to higher temperature sensitivity but lower strain sensitivity (absolute values); the higher NA does not influence the temperature sensitivity but results in higher absolute value of strain sensitivity; the longer MMF section brings lower temperature sensitivity but does not have an impact on strain sensitivity. These findings also contribute to the theoretical analysis of the length dependence in the SMS fiber sensors. Besides, the results of the characterization study show that the strain sensitivity is relatively low, which brings a possibility to develop a strain-insensitive temperature sensor. The proposed sensor is used for temperature sensing while the strain is constantly applied from 0 to 1100 µε with steps of 100 µε. The measured results are consistent with the comprehensive study. The mean temperature sensitivity is 6.14 pm/ • C with a standard deviation of 0.39 pm/ • C, which proves that the proposed temperature sensor exhibits good stability and is insensitive to strain. We expect that these results will provide a profound guideline to fiber sensors based on multimode interference.

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Section: Introductionmentioning

confidence: 72%

Fiber-optic multimode interference sensing: comprehensive characterization and its potential for strain-insensitive temperature sensing

Wang¹,

Mizuno²,

Dong³

et al. 2022

Preprint

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show abstract

“…The sensitivities of peak A and peak B are obtained by linear fitting, which are 5.91±0.01×10 −5 and 6.55±0.01×10 −4 nm/µε, respectively. The strain sensitivity of peak A decreases one order of magnitude compared with that of the other MZI sensors, which are 0.31 [24] and -0.72 pm/µε [25] respectively.…”

mentioning

confidence: 81%

Hybrid Mach-Zehnder interferometric sensor based on two core-of fset attenuators and an abrupt taper in single-mode fiber

Xu¹,

Han²,

Wang³

et al. 2014

中国光学快报

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This study proposes a new hybrid Mach-Zehnder interferometric (MZI) sensor based on two core-offset attenuators and an abrupt taper in a single-mode fiber fabricated by a fiber-taper machine and electric arc discharge. When the distance between the two core-offset attenuators is stretched to 4500 µm, significant interference signals are detected with a prominent attenuation peak of ∼28 dB. The proposed MZI can be used to measure temperature due to its low refractive index (RI) and strain cross-sensitivity. The temperature sensitivity is 34.95±0.04 and 106.70±0.04 pm/ • C in the temperature ranges of 14−250 and 250−1000 • C, respectively.

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“…[9][10][11][12] Accurate and reliable measurement of temperature is of significance for many chemical, physical, biological, and environmental applications. Compared with the fiber optic temperature sensors using fiber Bragg gratings, 13,14 long-period fiber gratings, 15 Fabry-Perot interferometer, 16 Mach-Zehnder interferometer, 17 microstructured optical fiber taper, 18 and photonic crystal fiber, 19 the SMS fiber optic structure based temperature transducers, taking advantage of the thermo-optic effect (TOE) and thermal expansion effect (TEE) of the employed materials, has superiorities of simple structure, easy fabrication, and big sensitivity with proper materials. 11 Recently, there have been some reports about fiber optic temperature sensor based on the SMS structure.…”

Section: Introductionmentioning

confidence: 99%

Temperature cross-sensitivity characteristics of singlemode–multimode–singlemode fiber structure

Zhang

Liu

Han

et al. 2015

Review of Scientific Instruments

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The temperature cross-sensitivity characteristics of a singlemode-multimode-singlemode (SMS) fiber structure packaged by a shell are studied both theoretically and experimentally. By theoretical investigation, we found that the temperature sensitivity of a SMS structure is mainly determined by the thermo-optic effect (TOE) of the cladding of the multimode fiber (MMF). Meanwhile, the TOE of the MMF core, thermal expansion effects (TEEs) of the MMF core, and the packaging material also influence the ultimate sensitivity, and the magnitude of their effects depends on the refractive index of the MMF cladding. Among them, the TEE of the packaging material, inducing an axial strain, is considered to be the second main factor. A temperature sensor based on a packaged SMS structure is designed and investigated to experimentally verify the theoretical findings. The experimentally measured temperature sensitivity of the sensor is -453.4 pm/°C, which agrees well with the theoretical prediction.

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Strain-insensitive and high temperature fiber sensor based on a Mach–Zehnder modal interferometer

Cited by 29 publications

References 9 publications

Fiber-optic multimode interference sensing: comprehensive characterization and its potential for strain-insensitive temperature sensing

Fiber-optic multimode interference sensing: comprehensive characterization and its potential for strain-insensitive temperature sensing

Hybrid Mach-Zehnder interferometric sensor based on two core-of fset attenuators and an abrupt taper in single-mode fiber

Temperature cross-sensitivity characteristics of singlemode–multimode–singlemode fiber structure

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