Recovering a fiber Bragg grating axial strain distribution from its reflection spectrum

Rodŕıguez-Cobo, Luis; Cobo, A.; López‐Higuera, J. M.

doi:10.1364/ol.38.002327

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…(9,10) Recently, Rodriguez-Coboa et al have proposed a new processing scheme based on a comparison metric, geometrical processing, and a blind optimization technique, particle swarm optimization (PSO), to resolve axial perturbation applied to FBGs. (11) The simulation results were consistent with those of experiments. In this paper, the strain-distribution sensing method based only on the Fabry-Perot-like reflective spectra of FBGs is presented.…”

Section: Introductionsupporting

confidence: 84%

Measurement of Arbitrary Strain Profiles of Fiber Bragg Gratings in Fabry-Perot-like Transmission Spectra Using a Real-Coded Genetic Algorithm

2014

Sensors and Materials

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Respiratory diseases in calves are the primary cause of infantile death since calves have low resistance to viruses or bacteria and are vulnerable to respiratory diseases such as pneumonia. An effective method used successfully for the early detection of respiratory diseases is to measure the rectal temperature of a calf using a thermometer. However, this method can only be conducted infrequently since it requires significant time and effort from farmers during group feeding. In order to minimize the time and effort required, we developed wearable wireless sensor nodes to automatically measure the body temperature of a calf. In our previous study, we succeeded in measuring the body temperature via wireless sensor nodes attached to a calf's tail, and correlated it with the rectal temperature. However, the wireless sensor nodes developed in that study would often indicate a lower temperature. The cause was due to a gap, which was attributed to the 7 mm thickness of the sensor nodes, between the measurement location on the calf and the temperature sensor. In order to address these problems, we designed new sensor nodes that were best suited to measure the temperature of the base of a calf's tail. As a result, we could accomplish measurement stability for the temperature sensor.

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Section: Introductionsupporting

confidence: 84%

Measurement of Arbitrary Strain Profiles of Fiber Bragg Gratings in Fabry-Perot-like Transmission Spectra Using a Real-Coded Genetic Algorithm

2014

Sensors and Materials

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“…Among heuristic bounded methods without starting point, the PSO method is widely used for optical applications. [31][32][33] The PSO method was proposed in 1995 by Kennedy and Eberhart. 34 It was used for the optimization of gold nanoshells using discrete dipole approximation (DDA) and Mie models for photothermal therapy, 35 and more general problems of plasmonics including the optimization of nanostructures and the resolution of the inverse problem.…”

Section: Combined Constrained Pso With Nelder-mead Algorithmmentioning

confidence: 99%

Fitting the optical constants of gold, silver, chromium, titanium, and aluminum in the visible bandwidth

2014

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The fitting of metal optical properties is a topic that has applications in advanced simulations of spectroscopy, plasmonics, and optical engineering. In particular, the finite difference time domain method (FDTD) requires an analytical model of dispersion that verifies specific conditions to produce a full spectrum in a single run. Combination of Drude and Lorentz models, and Drude and critical points models, are known to be efficient, but the number of parameters to be adjusted for fitting data can prevent accurate results from simulated annealing or Nelder-Mead. The complex number relative permittivities of Au, Ag, Al, Cr, and Ti from either Palik or Johnson and Christy experimental data in the visible domain of wavelengths are successfully fitted by using the result of the particle swarm optimization method with FDTD constraint, as a starting point for the Nelder-Mead method. The results are well positioned compared to those that can be found in the literature. The results can be used directly for numerical simulations in the visible domain. The method can be applied to other materials, such as dielectrics, and to other domain of wavelengths. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Research on non-uniform strain profile reconstruction along fiber Bragg grating via genetic programming algorithm and interrelated experimental verification

Zheng

Zhang

Xia

et al. 2014

Optics Communications

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Recovering a fiber Bragg grating axial strain distribution from its reflection spectrum

Cited by 6 publications

References 7 publications

Measurement of Arbitrary Strain Profiles of Fiber Bragg Gratings in Fabry-Perot-like Transmission Spectra Using a Real-Coded Genetic Algorithm

Measurement of Arbitrary Strain Profiles of Fiber Bragg Gratings in Fabry-Perot-like Transmission Spectra Using a Real-Coded Genetic Algorithm

Fitting the optical constants of gold, silver, chromium, titanium, and aluminum in the visible bandwidth

Research on non-uniform strain profile reconstruction along fiber Bragg grating via genetic programming algorithm and interrelated experimental verification

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