Temat: Fiber Bragg Grating - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental determination of the characteristics of a transmission spectrum of tilted fiber Bragg gratings
Autorzy:: Tolegenova, Akmaral
Kisała, Piotr A.
Zhetpisbayeva, Ainur
Mamyrbayev, Orken
Medetov, Bekbolat
Powiązania:: https://bibliotekanauki.pl/articles/221509.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical fiber
phase mask method
tilted fiber Bragg grating
Opis:: In this article, we study tilted fiber Bragg gratings (TFBGs) with tilt angles of 6°and 8°, their transmission spectra, and spectral parameters that have a linear dependence on the refractive index of the environment. It is shown that there can be several such characteristics, such as the minimum, width and energy of the spectrum. The linear dependence of the spectrum width on the refractive index does not depend on the tilt angle. The linear dependence of the spectrum minimum is only observed for a tilt angle of 8°. The results of this work can be used to create a sensor system based on an optical fiber.
Źródło:: Metrology and Measurement Systems; 2019, 26, 3; 581-589
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Physical foundations determining spectral characteristics measured in Bragg gratings subjected to bending
Autorzy:: Kisała, Piotr
Powiązania:: https://bibliotekanauki.pl/articles/2173892.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical fibers
tilted fiber Bragg grating
bending sensors
Opis:: The article presents an analysis of the impact of bending optical fibers with tilted Bragg gratings on their spectral parameters. This article proves that it is possible to a choose TFBG cladding mode and the optical spectrum range related to it that allows the best metrological properties to be obtained when measuring bend. The results contained in the paper explain why the minima in the spectral characteristics, corresponding only to some cladding modes, change their shape during TFBG bending, which is important for application of Bragg gratings as bending sensors. It has been presented that in the case of TFBG we are able to aggregate the knowledge obtained during experiment to the form of a physical model of the fiber bending sensor.
Źródło:: Metrology and Measurement Systems; 2022, 29, 3; 573--584
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Distributed strain reconstruction based on a fiber Bragg grating reflection spectrum
Autorzy:: Detka, M.
Kaczmarek, Z.
Powiązania:: https://bibliotekanauki.pl/articles/220892.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fiber Bragg grating (FBG)
synthesis
distributed sensing
transfer matrix method
Opis:: In this paper, we present a synthesis of the parameters of the fiber Bragg grating (FBG) and the reconstruction of the distributed strain affecting the grating, performed by means of its reflection spectrum. For this purpose, we applied the transition matrix method and the Nelder-Mead nonlinear optimization method. Reconstruction results of the strain profile carried out on the basis of a simulated reflection spectrum as well as measured reflection spectrum of the FBG indicate good agreement with the original strain profile; the profile reconstruction errors are within the single digit percentage range. We can conclude that the Nelder-Mead optimization method combined with the transition matrix method can be used for distributed sensing problems.
Źródło:: Metrology and Measurement Systems; 2013, 20, 1; 53-64
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A novel method of elimination of light polarization cross sensitivity on tilted fiber Bragg grating bending sensor
Autorzy:: Harasim, Damian
Cięszczyk, Sławomir
Powiązania:: https://bibliotekanauki.pl/articles/2173905.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tilted Bragg grating
optical fiber sensor
polarization
bending measurement
Opis:: The article shows the possibility of using TFBG gratings to measure the radius of curvature of fiber bending in conditions of variable polarization of the introduced light. Most of the modern, stable light sources generate light with a high degree of polarization. Due to the spatial asymmetry, the direction of the light polarization plane affects the spectral parameters of individual modes. For this reason, in the measurement systems using TFBGs presented so far it becomes necessary to determine and control the state of light polarization directly in front of the periodic structure. The article presents the determined spectral parameters of the cladding modes which allow bending measurements regardless of the direction of polarization of the introduced light. Thanks to this, the measuring system can be constructed without providing control of the introduced light polarization angle, which makes its construction simpler. When using TFBGs with an angle of 2°, the accuracy of determining the bending radius in the range from 15 mm to 30 mm when changing the angle of the plane of polarization in the full range is 0.318 mm in the case of changes in the transmission coefficient. For changes in the wavelength of the selected cladding mode, the accuracy is 0.3203 mm, with the input light polarization being changed in the range from 0° (P type) to 90° (S type).
Źródło:: Metrology and Measurement Systems; 2022, 29, 4; 737--749
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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