Measurement of magnetic field and temperature using single bending-ring cascaded with FBG structure Mach-Zehnder interferometer

Wang, Zhaoxiang; Liu, Yueming; Tu, Fan; Feng, Senlin

doi:10.1016/j.ijleo.2023.170856

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…), bent fibers are simple in structure, high in mechanical strength, and easy to fabricate. Due to the growing popularity of optical fiber communication networks worldwide, FOTSs based on bent optical fibers have been published, and the bending loss characteristics of optical fibers have also been extensively investigated [ 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. In 2009, Ginu et al [ 27 ] exposed a layer of material outside the cladding by removing the original coating layer, which was used to eliminate the whispering-gallery mode (WGM), thus effectively reducing the influence of other factors when performing temperature measurements.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Balloon-like Fiber Interferometer Based on Ethanol Coated for Temperature Measurement

Ding,

Lin,

Liu

et al. 2024

Sensors

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A highly sensitivity balloon-like fiber interferometer based on ethanol coating is presented in this paper. The Mach–Zehnder interferometer is formed by bending a single-mode fiber to a balloon-like structure and nested in the Teflon tube. Then, an ethanol solution was filled into the tube of the balloon-like fiber interferometer by the capillary effect. Due to the high sensitivity of the refractive index (RI) of ethanol solutions to temperature, when the external temperature varies, the optical path difference changes. The change in temperature can be detected by the shift in the interference spectrum. Limited by the size of the balloon-like structure, three kinds of these structures with different sensitive lengths were prepared to select the best parameters. The sensitive lengths were 10, 15 and 20 mm, respectively, and the RI detection performance of each structure in 10~26% NaCl solutions was investigated experimentally. The results show that when the sensitive length is 20 mm, the RI sensitivity of the sensor is the highest, which is 212.88 nm/RIU. Ultimately, the sensitive length filled with ethanol is 20 mm. The experimental results show that the temperature sensitivity of the structure is 1.145 nm/°C in the range of 28.1 °C~35 °C, which is 10.3 times higher than that of an unfilled balloon-like structure (0.111 nm/°C). The system has the advantages of low cost and easy fabrication, which can potentially be used in high-precision temperature monitoring processes.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive Balloon-like Fiber Interferometer Based on Ethanol Coated for Temperature Measurement

Ding,

Lin,

Liu

et al. 2024

Sensors

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“…However, due to the bending loss not having a linear variation pattern under small bent radius, simply using the bending loss of single-mode fibers is not suitable for measuring the variation in bent radius. It is necessary to use the coherent characteristics inside bent fibers for the measurement of small radius changes [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Spectral Characteristics and Displacement Sensing of U-Shaped Single-Mode–Multimode–Single-Mode Fiber Structure

Tian,

Chen,

Ren

et al. 2024

Sensors

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The U-shaped fiber configuration represents the elementary form of micro-displacement sensing, characterized by its exceptional freedom and flexibility. The study proposes the U-shaped bent single-mode–multimode–single-mode (SMS) fiber structure that integrates the multimode interference (MMI) effect for enhanced mode dispersion and the Mach–Zönder interference (MZI) effect for spectral sensitivity improvement. The transmission spectral properties of the U-shaped SMS fiber structure with a bent radius over 1 cm are experimentally measured as the change in displacement varied within the range of 5 mm in this work. As the radius decreases, the spectrum shows redshift, which is related to the central wavelength of the peak or dips—a smaller wavelength results in a stronger redshift for the same displacement change. The average sensitivity of micro-displacement measurement within a range of 5 mm is 5.41 pm/μm, and the linearity is 99.62%. The maximum sensitivity of U-shaped SMS fiber structure is 34.46 pm/μm, with the minimum displacement change of approximately 5.804 nm. The transmission spectral properties of the U-shaped SMS fiber structure within the ranges of 50 μm, 500 μm, and 5 mm are experimentally measured in this work. This experiment observed a relatively uniform spectral drift pattern in a large range of micro-displacement sensing. The measurement range is limited by the limited spectral range of the light source and the discontinuous variation in the effective refractive index. This provides an experimental reference for further understanding the characteristics of U-shaped fiber structures and applying its application in micro-displacement sensing.

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Advances in fibre Bragg grating technology for magnetic field sensing: A review

Rostami,

Wahaab,

Soleimani

et al. 2023

Measurement

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Measurement of magnetic field and temperature using single bending-ring cascaded with FBG structure Mach-Zehnder interferometer

Cited by 3 publications

References 10 publications

Highly Sensitive Balloon-like Fiber Interferometer Based on Ethanol Coated for Temperature Measurement

Highly Sensitive Balloon-like Fiber Interferometer Based on Ethanol Coated for Temperature Measurement

Spectral Characteristics and Displacement Sensing of U-Shaped Single-Mode–Multimode–Single-Mode Fiber Structure

Advances in fibre Bragg grating technology for magnetic field sensing: A review

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