Simultaneous Measurement of Transverse Pressure and Temperature Based on Multi-core Fiber Cascaded with Fiber Bragg Grating

You-hua, 蒋友华 Jiang; Haiwei, 傅海威 Fu; Jin-le, 张静乐 Zhang; Zhen′an, 贾振安 Jia; Xueguang, 乔学光 Qiao

doi:10.3788/gzxb20174601.0106002

Cited by 4 publications

(1 citation statement)

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“…Seraji et al [8] completed a measurement of thermal load and hydrostatic pressure by using the reflection wavelength of double-clad FBGs with different coating thicknesses. Based on the structure of FBG-cascaded multi-core optical fiber, Jiang et al [9] measured the transverse pressure and temperature simultaneously. Kaplan et al [10] used optical frequency domain reflectometry (OFDR) and completed measurement of temperature and strain based on high birefringence (HiBi) FBG.…”

Section: Introductionmentioning

confidence: 99%

A temperature and strain sensor based on a cascade of double fiber Bragg grating

Lin

Zhang

et al. 2019

Meas. Sci. Technol.

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Fiber Bragg gratings (FBGs) have become a promising sensor element for measuring temperature, strain and other parameters. However, there exists a cross-sensitivity between temperature and strain. An all-fiber sensing system composed of gold-plated FBGs and acrylic FBGs has been proposed and fabricated, which can achieve simultaneous measurement of axial strain and temperature. Using a spectrometer to monitor the shift in the transmission spectrum in real time, the strain and ambient temperature applied to the sensor can be measured conveniently. The experimental results show that the temperature sensitivity of a gold-plated FBG is 3.2 times of that of an acrylate-plated FBG, which can distinguish the temperature changes efficiently. In other words, its sensitivity is increased 2.2 times compared with ordinary fiber grating. The strain sensitivity of gold-plated FBG and acrylate-plated FBG is the same, which is 1.19 pm/µε. The sensor has the advantages of having a simple structure and high sensitivity and can be used to monitor the running state of rail traffic.

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Section: Introductionmentioning

confidence: 99%