Experimental and theoretical analysis of curvature sensor based on cladding mode resonance with triple cladding quartz specialty fiber

Fu, Xinghu; Wen, Jing; Zhang, Yuepeng; Wang, Dong; Liu, Fan; Xie, Hongqiang; Fu, Guangwei; Bi, Weihong

doi:10.1016/j.optcom.2018.07.077

Cited by 9 publications

(1 citation statement)

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“…Optical fiber sensors have attracted more and more attention due to their inherent advantages such as simple structure, easy implementation, high sensitivity, chemical corrosion resistance, and are not easily affected by electromagnetic interference [1]. Furthermore, optical fiber sensors have been successfully used in monitoring physical quantities, such as temperature [2], strain [3], pressure [4], rotation [5], magnetic field [6], refractive index (RI) [7], relative humidity [8], and curvature [9][10][11][12][13][14]. The bending curvature of the structure is an important parameter for measuring the deformation of the object, and it is also an important optical parameter for optical fiber sensor.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Measurement of Curvature and Temperature Based on a Simple Cascaded Fiber Interferometer

Wang¹,

Lu²,

Liu³

2022

PIER M

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An optical fiber sensor based on thin-core fiber (TCF) and no-core fiber (NCF) interference structures is presented and experimentally demonstrated to measure the curvature and temperature. The fabrication process of the sensor is simple and convenient, and the sensing part is formed by cascading a TCF and an NCF between two single-mode fibers. The dips at resonant wavelengths are generated in the optical transmission spectrum owing to mode interference. The experimental results indicate that an optical curvature sensitivity of −5.76 nm/m −1 is achieved in the linear range of 0.9895-3.2817 m −1 and that a temperature sensitivity of 0.18 nm/ • C is obtained in the temperature range of 25-55 • C. Additionally, the cross sensitivity problem is solved using the coefficient matrix measurement method, and the cross-sensitivity is as low as 0.0312 m −1 / • C. Therefore, the sensor exhibits a highly reproducible technique and low cross sensitivity, which has a wide range of application prospects in the accurate measurement of mechanical arms and structural health monitoring.

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