Constructed fiber-optic FPI-based multi-parameters sensor for simultaneous measurement of pressure and temperature, refractive index and temperature

Zhang, Ting; Liu, Yinggang; Yang, Danqing; Wang, Yuxi; Fu, Haiwei; Jia, Zhang; Gao, Hong

doi:10.1016/j.yofte.2019.02.007

Cited by 23 publications

(10 citation statements)

References 13 publications

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“…For example, Zhang et al proposed a multi-parameter measurement sensor consisting of a fiber Bragg grating (FBG) and the Fabry-Perot interferometers (FPIs). The FPIs are composed of a small single-mode fiber, an ultraviolet band solidification adhesive and other components [16]. The sensor's resolution for the temperature, pressure and liquid parameter sensing sensitivity can reach 0.07 °C, 6 kPa and 3.0 × 10 −4 RIU, respectively.…”

Section: Structure and Principle Of Sensormentioning

confidence: 99%

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Luo

Liu

et al. 2019

Coatings

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To effectively control the critical thickness of a polydimethylsiloxane (PDMS) film and enhance the sensitivity characteristics of the fiber pressure sensor, we propose a new method to optimize the thickness of the PDMS film in a fiber tube. It is characterized by analyzing the relationship between the diffusion rate of the PDMS and its viscosity, and using an oven to solidify the PDMS to a certain extent to accurately control the diffusion rate and diffusion length of the PDMS in the fiber tube. We also used multiple transfer methods to control the volume of the PDMS in the fiber tube to minimize the thickness of the formed PDMS film. Fabry-Perot interference occurs when the surface of the PDMS film layer filled into the fiber tube and the adjacent single mode fiber/fiber tube form a joint surface. This method forms a new fiber-optic Fabry-Perot pressure sensor that is very sensitive to external pressure parameters. The experimental results show that the optimized film thickness will be reduced to an order of 20 μm. Correspondingly, the fiber-optic pressure sensor has a sensitivity of up to 100 pm/kPa, which is about 100 times that reported in the literature. The structure also has better resistance to temperature interference. To our knowledge, this is the first in-depth study of the effects of the PDMS viscosity coefficient, diffusion rate, and fiber pressure sensitivity in fiber. The film thickness optimization method has some advantages, including a low cost, good controllability, and good application value in high sensitivity pressure and sound wave detection.

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Section: Structure and Principle Of Sensormentioning

confidence: 99%

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Luo

Liu

et al. 2019

Coatings

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“…. (11) In fact, since the sensor is connected to the structure through the welding layer, the stretching or compression of the tested structure results in the transfer of strain from the structure to the sensor. Therefore, there is a strain transfer coefficient between the strain measured by the sensor and the actual strain of the tested structure, which is determined by the welding layer.…”

Section: Sensor Fabricationmentioning

confidence: 99%

“…Due to the thermal expansion effect of the cavity material, a linear relationship between the optical path difference and temperature variation can be obtained. The equation can be written as 11 12 The sensor measurement range and measurement accuracy can be designed by adjusting the thickness of the MEMS optical reflective micromirrors (silicon) diaphragm. The cavity length of the FP is 31.2 um, and the reflectivity fringe finesse F R = 10.…”

Section: Sensor Fabricationmentioning

confidence: 99%

“…As a basic physical parameter, the strain can be successfully measured by sensors including the fiber Bragg grating [3,4], interferometric fiber-optic sensor [5][6][7] and distributed fiber sensor [8,9]. Among them, the Fabry-Perot (FP) sensors are an attractive choice, owing to their compact structure, and especially their advantages in terms of sensitivity and high-temperature resistance [10][11][12]. Previous studies have proposed FP force sensors; the theory of the axial contact force sensor reported by [13] corroborated that the wavelength of interference dip will have a shift as the applied axial force increases.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Structural Loads Using a Novel MEMS Extrinsic Fabry–Perot Strain Sensor

et al. 2019

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In this paper, microelectromechanical systems (MEMS) technology was used to fabricate a novel extrinsic fiber Fabry–Perot (EFFP) strain sensor; this fiber sensor is applied to measure load with higher precision for a small structure. The sensor cavity consists of two Fabry–Perot (FP) cavity mirrors that are processed by surface micromachining and then fused and spliced together by the silicon–glass anode bonding process. The initial cavity length can be strictly controlled, and the excellent parallelism of the two faces of the cavity results in a high interference fineness. Then, the anti-reflection coating process is applied to the sensor to improve the clarity of the interference signal with the cavity, with its wavelength working within the range of the C + L band. Next, the sensor placement is determined by the finite element software Nastran. Experimental results indicate that the sensor exhibits a good linear response (99.77%) to load changes and a high repeatability. Considering the strain transfer coefficient, the sensitivity for the tested structure load is as high as 35.6 pm/N. Due to the miniaturization, repeatability, and easy-to-batch production, the proposed sensor can be used as a reliable and practical force sensor.

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“…While several configurations that are based on optical fiber sensors were able to detect two or even three parameters, the simultaneous measurement of multiple measurands often requires the implementation of extra sensing elements or complex configurations that result in an increase of the total sensor length as well as the interrogation complexity [2][3][4][5][6]. Heretofore the number of multiparameter (3+) fiber sensors is rather diminutive when compared with simple or hybrid optical fiber sensors [7]. Since then, more multiparameter sensors have been developed, though for most cases, cascaded structures were employed, and a transmission scheme was used.…”

Section: Introductionmentioning

confidence: 99%

Multiparameter sensor based on hollow square core optical fiber

Santos

Pereira

Bierlich

et al. 2023

European Workshop on Optical Fibre Sensors (EWOFS 2023)

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A Fabry Perot (FP) based fiber sensor for multiparameter measurement is proposed. The sensor is constituted by a short section of a hollow square core fiber (HSCF) spliced between a single mode fiber and a long section of a silica capillary tube. In a reflection scheme, several FP cavities are enhanced in different areas of the HSCF. In a single 439 μm long sensing head, three FP cavities are excited. Using the Fourier band-pass filter method, each cavity was individually monitored towards variations of pressure, temperature, and curvature. The maximum sensitivities of (3.23 ± 0.04) nm/MPa, (9.6 ± 0.3) pm/°C, and (-32 ± 1) pm/m-1 were obtained for pressure, temperature, and curvature, respectively within a measurement range of 0.4 MPa, 110°C, and 9 m-1. The distinct responses of the FP cavities to the measurands allow for a triple-hybrid application of the sensor towards simultaneous measurement of pressure, temperature, and curvature. The proposed sensor is robust with simple fabrication and small dimensions, revealing promising to be employed in a wide range of applications where the measurement of several physical parameters is required.

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Constructed fiber-optic FPI-based multi-parameters sensor for simultaneous measurement of pressure and temperature, refractive index and temperature

Cited by 23 publications

References 13 publications

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Measurement of Structural Loads Using a Novel MEMS Extrinsic Fabry–Perot Strain Sensor

Multiparameter sensor based on hollow square core optical fiber

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