A Temperature-Insensitive Bidimensional Curvature Sensor Employing C-Fiber-Based Fabry–Pérot Air Cavity

Sun, Yuanqi; Zhou, Xue; Yan, Xin; Zhang, Xuenan; Wang, Fang; Cheng, Tonglei

doi:10.1109/tim.2022.3214491

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…Consequently, fiber optic curvature sensors have been widely researched by academic groups and industries worldwide. Several fiber optics sensors have been fabricated using specialty optical fibers such as suspended-core fiber (SCF) [4], dispersion compensation fiber (DCF) [5], seven-core fiber (SCF) [6], C-fiber [7], hollow core fiber (HCF) [8], negative curvature hollow core fiber (NCHCF) [9], and ring core few-mode fiber (RC-FMF) [10]. Not only are specialty fibers used to construct curvature sensors, but SMF is also used.…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer

Martinez-Ramirez,

Hernández-Romano,

Guzmán-Cano

et al. 2024

Photonics

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A fiber curvature sensor based on a Mach–Zehnder Interferometer (MZI) constructed using the waist-enlarged technique to splice a segment of non-zero dispersion-shifted fiber (NZ-DSF) between two segments of single mode fiber (SMF) is proposed and experimentally demonstrated. All fabricated sensors presented an improvement in their curvature sensitivity when they were coated with polydimethylsiloxane (PDMS) polymer. The sensor that exhibited the best performance was 6.5 cm long, with a curvature sensitivity of 8.27 nm/m−1 in a range of 0.69 m−1 (from 1.08 to 1.77 m−1). This sensitivity is 3.22 times higher than that of the sensor without polymer. Additionally, the sensor coated with polymer exhibited cross-sensitivity that is 2.23 times smaller than the sensor without polymer. The easy fabrication and notable performance of this device makes it alluring for structural health monitoring.

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