Fabry-Perot cavity based on silica tube for strain sensing at high temperatures

Ferreira, Marta S.; Roriz, Paulo; Bierlich, Jörg; Kobelke, Jens; Wondraczek, Katrin; Aichele, Claudia; Schuster, Kay; Santos, José Lúıs; Frazão, Orlando

doi:10.1364/oe.23.016063

Cited by 37 publications

(13 citation statements)

References 19 publications

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“…FPI high-temperature sensors are also fabricated by various techniques, including diaphragm-based [16,17], special fiber-based [18][19][20][21][22][23][24][25][26][27], multi-fusion splicing-based [28,29], chemical etching-based [30], FIB-based [31,32] and laser micromachining-based [33,34]. The sensors created with the first four techniques are assembly ones, which usually need to assemble multiple separated components together with a fusion splicer.…”

Section: Introductionmentioning

confidence: 99%

Refractive-index-modified-dot Fabry-Perot fiber probe fabricated by femtosecond laser for high-temperature sensing

Chen¹,

Shu²

2018

Opt. Express

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An optical fiber Fabry-Perot probe sensor for high-temperature measurement is proposed and demonstrated, which is fabricated by inducing a refractive-index-modified-dot (RIMD) in the fiber core near the end of a standard single mode fiber (SMF) using a femtosecond laser. The RIMD and the SMF end faces form a Fabry-Perot interferometer (FPI) with a high-quality interference fringe visibility (>20dB). As a high-temperature sensor, such an FPI exhibits a sensitivity of 13.9pm/°C and 18.6pm/°C in the range of 100-500°Cand 500-1000°C,respectively. The fabrication process of this device is quite straightforward, simple, time saving, and the sensor features small size, ease of fabrication, low cost, assembly-free, good mechanical strength, and high linear sensitivity.

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Section: Introductionmentioning

confidence: 99%

Refractive-index-modified-dot Fabry-Perot fiber probe fabricated by femtosecond laser for high-temperature sensing

Chen¹,

Shu²

2018

Opt. Express

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“…Because they are fiberbased, these sensors can tolerate temperature variations, high pressure and strain; they are less affected by corrosion, while still maintaining their physical integrity [1,2]. They are compact and usually have simple configurations [3,4]. Several technologies have been introduced to construct in-fiber FPIs, such as simply placing a coating at the end of the fiber [5], chemical etching [6] and splicing technology [7].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we discuss an in-fiber FPI built by splicing a short section of capillary optical fiber between two single mode fibers to create a cylindrical air-cavity inside the fiber [4]. The in-fiber FPI was tested as a strain sensor, showing desirable high response to axial strain and low temperature sensitivity.…”

Section: Introductionmentioning

confidence: 99%

In-fiber Fabry-Perot interferometer for strain and magnetic field sensing

Costa¹,

Gouvêa²,

Soares³

et al. 2016

Opt. Express

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In this paper we discuss the results obtained with an in-fiber Fabry-Perot interferometer (FPI) used in strain and magnetic field (or force) sensing. The intrinsic FPI was constructed by splicing a small section of a capillary optical fiber between two pieces of standard telecommunication fiber. The sensor was built by attaching the FPI to a magnetostrictive alloy in one configuration and also by attaching the FPI to a small magnet in another. Our sensors were found to be over 4 times more sensitive to magnetic fields and around 10 times less sensitive to temperature when compared to sensors constructed with Fiber Bragg Grating (FBG).

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“…The light that was transmitted to the capillary tube traveled mostly through the hollow core, which was filled with air. Refractive index of the optical cavity can be estimated using (1), where n is the refractive index and L the cavity length [9]…”

Section: Resultsmentioning

confidence: 99%

Fiber Fabry-Perot interferometer for curvature sensing

et al. 2016

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A curvature sensor based on an Fabry-Perot (FP) interferometer was proposed. A capillary silica tube was fusion spliced between two single mode fibers, producing an FP cavity. Two FP sensors with different cavity lengths were developed and subjected to curvature and temperature. The FP sensor with longer cavity showed three distinct operating regions for the curvature measurement. Namely, a linear response was shown for an intermediate curvature radius range, presenting a maximum sensitivity of 68.52 pm/m 1. When subjected to temperature, the sensing head produced a similar response for different curvature radii, with a sensitivity varying from 0.84 pm/℃ to 0.89 pm/℃, which resulted in a small cross-sensitivity to temperature when the FP sensor was subjected to curvature. The FP cavity with shorter length presented low sensitivity to curvature.

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Fabry-Perot cavity based on silica tube for strain sensing at high temperatures

Cited by 37 publications

References 19 publications

Refractive-index-modified-dot Fabry-Perot fiber probe fabricated by femtosecond laser for high-temperature sensing

Refractive-index-modified-dot Fabry-Perot fiber probe fabricated by femtosecond laser for high-temperature sensing

In-fiber Fabry-Perot interferometer for strain and magnetic field sensing

Fiber Fabry-Perot interferometer for curvature sensing

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