CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

Broadway, Christian; Kinet, Damien; Theodosiou, Antreas; Kalli, Kyriacos; Gusarov, A.; Caucheteur, Christophe; Mégret, Patrice

doi:10.3390/s19132853

Cited by 33 publications

(21 citation statements)

References 25 publications

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“…Furthermore, the CYTOP is approximately transparent material for wavelengths (0.2-2 µm). It has a minimum dispersion and maximum abbe number values among the optical polymer [16][17][18][19][20][21]. Moreover, the CYTOP material has excellent stability of mechanical and optical features in humidity circumstances, so this is the reason behind involve it in humidity sensor applications [22].…”

Section: Introductionmentioning

confidence: 99%

Pressure Sensitivity Improvement of Fiber Bragg Grating Sensor Using Cytop Fiber

Alshaikhli

Alhasan

Numan

et al. 2021

Preprint

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Recent demand for using FBG as a pressure sensor in a different industrial application makes several types of research to be conducted to enhance the pressure sensitivity. This paper demonstrates a combination method to enhance pressure sensitivity. Firstly, in this work FBG with polymer fiber named perfluorinated monomer (CYTOP) was used with specific parameters. Secondly, this FBG was covered by a patch of thin polymer material. However, the strain, temperature, and pressure sensitivity were recorded and compared with bare silica FBG. The temperature effect was reduced by using the cascade FBG technique. By applying force on the grating and changing of refractive index; the Bragg wavelength was shifting, making the CYTOP FBG responds more efficiently than silica FBG. This responsivity was leading to an improvement in pressure sensitivity. Experimental results illustrate that the enhanced CYTOP FBG based pressure sensor achieves pressure sensitivity up to 93.5 pm/KPs with a resolution of 0.005 KPa, which was 1500 times higher than bare FBG. The advanced CYTOP FBG based pressure sensor can be functionalized in a technical application for instance, structural health monitoring, pressure of oil wells application, explosion wave, and prevention of erosion.

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Section: Introductionmentioning

confidence: 99%

Pressure Sensitivity Improvement of Fiber Bragg Grating Sensor Using Cytop Fiber

Alshaikhli

Alhasan

Numan

et al. 2021

Preprint

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“…fiber sensors an intrinsic safe solution for harsh and explosive environments [2]. For these reasons, optical fiber sensors have been widely used in medicine [3], healthcare [4], industrial applications [5], structural health monitoring [6] and in radioactive environments [7].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Linearity and Sensitivity of 3D-Printed Diaphragms With Chirped FBGs in CYTOP Fibers

et al. 2020

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We report the development of an optimization approach for diaphragm-embedded optical fiber sensors, which was applied on the pressure, force and liquid level assessment using chirped fiber Bragg gratings (CFBGs) inscribed in cyclic transparent optical polymer (CYTOP) fibers. The inscription was performed using the plane-by-plane method with a femtosecond laser, whereas the diaphragm optimization was performed through the multi-objective particle swarm optimization (MOPSO). The objective functions for the optimization were obtained from numerical simulation using the finite element method of diaphragms with different thickness and diameters. The MOPSO resulted in a set of solutions with thickness and diameter aiming the optimization of sensitivity and linearity of diaphragm-embedded CFBG sensors. Three configurations were chosen with different values sensitivity and linearity. Experimental analysis was performed in each configuration for temperature and pressure variations, where the results confirmed the different sensitivity and linearity levels for each chosen configuration. Two applications were analyzed for the proposed configurations with higher sensitivity and linearity: one for force estimation over a 200-N range and the other for sub-millimeter assessment of liquid level over a 50-cm range. In order to obtain a highly reliable and accurate system, a novel data integration method for chirped FBGs was proposed. In this case, the estimation of force, pressure or liquid level was performed considering the contributions of both wavelength shift and full width half maximum (FWHM) variations. The proposed approach resulted in error improvement of 60% for all cases and for all parameters analyzed.

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“…Fiber Bragg gratings (FBG) are routinely used for making static and dynamic strain and temperature measurements up to the kHz range [ 1 , 2 , 3 ]. Significant improvements have also been made to FBGs to improve strength and versatility [ 4 , 5 , 6 ] while also improving sensitivity [ 7 , 8 ]. Such measurements have been used in industry for many years, for example, in testing strain in airplanes [ 9 ] and bridges [ 10 ] or automotive traffic [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings

Gilbertson

Pickrell

Castano

et al. 2020

Sensors

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Dynamic elastic strain in ~1.8and 1.0 m diameter containment vessels containing a high explosive detonation was measured using an array of fiber Bragg gratings. The all-optical method, called real-time localized strain measurement, recorded the strain for 10 ms after detonation with additional measurements being sequentially made at a rate of 1.7 MHz. A swept wavelength laser source provided the repetition rate necessary for such high-speed measurements while also providing enough signal strength and bandwidth to simultaneously measure 8 or more unique points on the vessel’s surface.The data presented here arethen compared with additional diagnostics consisting of a fast spectral interferometer and an optical backscatter reflectometer to show a comparison between the local and global changes in the vessel strain, both dynamically and statically to further characterize the performance of the localized strain measurement.The results are also compared with electrical resistive strain gauges and finite element analysis simulations.

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CYTOP Fibre Bragg Grating Sensors for Harsh Radiation Environments

Cited by 33 publications

References 25 publications

Pressure Sensitivity Improvement of Fiber Bragg Grating Sensor Using Cytop Fiber

Pressure Sensitivity Improvement of Fiber Bragg Grating Sensor Using Cytop Fiber

Optimizing Linearity and Sensitivity of 3D-Printed Diaphragms With Chirped FBGs in CYTOP Fibers

High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings

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