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Wyszukujesz frazę "photonic sensors" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Coupled energy measurements in multi-core photonic-crystal fibers
Autorzy:
Klimek, J.
Powiązania:
https://bibliotekanauki.pl/articles/221407.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photonic crystal fibers
multi-core fibers
optical fiber measurements
photonic sensors
Opis:
This paper outlines a measurement method of properties of microstructured optical fibers that are useful in sensing applications. Experimental studies of produced photonic-crystal fibers allow for a better understanding of the principles of energy coupling in photonic-crystal fibers. For that purpose, fibers with different filling factors and lattice constants were produced. The measurements demonstrated the influence of the fiber geometry on the coupling level of light between the cores. For a distance between the cores of 15 μm, a very low level (below 2%) of energy coupling was obtained. For a distance of 13 μm, the level of energy transfer toneighboring cores on the order of 2-4% was achieved for a filling factor of 0.29. The elimination of the energycoupling penomenon between the cores was achieved by duplicating the filling factor of the fiber. The coupling level was as high as 22% in the case of fibers with a distance between the cores of 8.5 μm. Our results can be used for microstructured-fiber sensing applications and for transmission-channel switching in liquid-crystal multi-core photonic fibers.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 689-696
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotation and twist measurement using tilted fibre Bragg gratings
Autorzy:
Kisała, P.
Skorupski, K.
Cięszczyk, S.
Panas, P.
Klimek, J.
Powiązania:
https://bibliotekanauki.pl/articles/221822.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photonic sensors
fibre Bragg gratings
twist measurements
rotation measurements
Opis:
The paper presents a method of measuring the angle of rotation and twist using a tilted fibre Bragg grating (TFBG) periodic structure with a tilt angle of 6°, written into a single-mode optical fibre. It has been shown that the rotation of the sensor by 180° causes a change in the transmission coefficient from 0.5 to 0.84 at a wavelength of 1541.2 nm. As a result of measurements it was determined that the highest sensitivity can be obtained for angles from 30° to 70° in relation to the basic orientation. The change in the transmission spectrum occurs for cladding modes that change their intensity with the change in the polarization of light propagating through the grating. The same structure can also be used to measure the twist angle. The possibility of obtaining a TFBG twist by 200° over a length of 10 mm has been proved. This makes it possible to monitor both the angle of rotation and the twist of an optical fibre with the fabricated TFBG.
Źródło:
Metrology and Measurement Systems; 2018, 25, 3; 429-440
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Optical Fiber Technology in Poland
Autorzy:
Dorosz, J.
Romaniuk, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/226479.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optical fibers
optical communication systems
photonic sources and detectors
photonic sensors
integrated optics
photonics applications
photonic materials
Opis:
In this paper, the authors, chairmen of the 13th Conference on Optical Fibers and Their Applications OFA 2011, and editors of the conference proceedings summarize the development of optical fiber technology in Poland (during the period of 2009-2011) on the basis of papers presented there and consecutively published in this volume. The digest is thus not full but covers the periodically presented material every 18 months during the meetings on optical fibers in Białystok-Białowieża and Lublin-Krasnobród.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 2; 191-197
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixtures of selected n-alkanes and Au nanoparticels for optical fiber threshold temperature transducers
Autorzy:
Przybysz, N.
Marć, Paweł
Tomaszewska, E.
Grobelny, Jarosław
Jaroszewicz, Leszek R.
Powiązania:
https://bibliotekanauki.pl/articles/1818228.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
optical fiber sensors
temperature treshold sensors
gold nanoparticles
n-alkanes
photonic crystal transducers
Opis:
Thermo-optic properties enhancement of the bi-stable temperature threshold sensors based on a partially filled photonic crystal fiber was reported. Previously tested transducers filled with a selected group of pure n-alkanes had in most cases differences between switching ON and OFF states. Therefore, the modification of filling material by using additional crystallization centers in the form of gold nanoparticles was applied to minimize this undesirable effect. The evaluation of the thermodynamic properties of pentadecane and its mixtures with 14 nm spherical Au nanoparticles based on the differential scanning calorimetry measurements was presented. Optical properties analysis of sensors prepared with these mixtures has shown that they are bounded with refractive index changes of the filling material. Particular sensor switches ON before melting process begins and switches OFF before crystallization starts. Admixing next group of n-alkanes with these nanoparticles allows to design six sensors transducers which change ON and OFF states at the same temperature. Thus, the transducers with a wider temperature range for fiber-optic multi-threshold temperature sensor tests will be used.
Źródło:
Opto-Electronics Review; 2020, 28, 4; 220--228
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mixtures of selected n-alkanes and Au nanoparticels for optical fiber threshold temperature transducers
Autorzy:
Przybysz, N.
Marć, P.
Tomaszewska, E.
Grobelny, J.
Jaroszewicz, L. R.
Powiązania:
https://bibliotekanauki.pl/articles/1818233.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
optical fiber sensors
temperature treshold sensors
gold nanoparticles
n-alkanes
photonic crystal transducers
Opis:
Thermo-optic properties enhancement of the bi-stable temperature threshold sensors based on a partially filled photonic crystal fiber was reported. Previously tested transducers filled with a selected group of pure n-alkanes had in most cases differences between switching ON and OFF states. Therefore, the modification of filling material by using additional crystallization centers in the form of gold nanoparticles was applied to minimize this undesirable effect. The evaluation of the thermodynamic properties of pentadecane and its mixtures with 14 nm spherical Au nanoparticles based on the differential scanning calorimetry measurements was presented. Optical properties analysis of sensors prepared with these mixtures has shown that they are bounded with refractive index changes of the filling material. Particular sensor switches ON before melting process begins and switches OFF before crystallization starts. Admixing next group of n-alkanes with these nanoparticles allows to design six sensors transducers which change ON and OFF states at the same temperature. Thus, the transducers with a wider temperature range for fiber-optic multi-threshold temperature sensor tests will be used.
Źródło:
Opto-Electronics Review; 2020, 28, 4; 220--228
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetooptic effect of photonic crystal fiber in blue region of visible spectrum
Autorzy:
Barczak, K.
Powiązania:
https://bibliotekanauki.pl/articles/201952.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetooptic effects
optical fiber current sensors
photonic crystal fiber
efekt magnetooptyczny
światłowód
czujniki prądu
włókno fotoniczne kryształów
Opis:
The phenomenon of optical birefringence in optical fibers is caused by external factors and stress induced by the manufacturing process. This optical birefringence makes it difficult to apply optical fibers as a polarimetric sensors head. Author of this paper, proposes the application of index guiding photonic crystal fibers because stress values in a fiber core caused by internal and external factors are lower. In this paper investigation results extended in comparison with the previous author’s investigations are presented. This extension relies on investigation of magnetooptic for wavelength 405 nm. On the basis of experimental results optimal work points of optical sensing fibers were determined.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 683-689
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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