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Tytuł:
A new design of a photonic crystal fiber with a beam shaping effect and flexible management of dispersion and confinement loss
Autorzy:
Huang, Y.
Jiang, P
Yang, H.
Yu, M.
Powiązania:
https://bibliotekanauki.pl/articles/173817.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystal fiber
hollow beam
chromatic dispersion
Opis:
A new design of a guiding-index photonic crystal fiber which possesses a beam shaping effect and flexible control of dispersion has been proposed in this paper. It can shape a Gaussian beam into a circular hollow beam with certain dimension, which can be used in optical communication systems with a Cassegrain antenna to improve transmission efficiency by avoiding the loss of energy caused by the subreflector center reflection. In addition, its dispersion and confinement loss can be changed in a broad range by slightly adjusting structural parameters under condition that the hollow beam dimension remains about the same. Fairly practical properties, zero dispersion or flattened dispersion, can be obtained when structural parameters are set appropriately. A series of models with different parameters are analyzed and compared. Results of numerical simulation show that the ultra-low dispersion of 1.802 ps/km/nm can be obtained when λ = 1.31 μm. Several modest design parameters are given as well.
Źródło:
Optica Applicata; 2014, 44, 3; 375-387
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A polarization filter at 1550 nm based on photonic crystal fiber with symmetry around gold-coated holes
Autorzy:
Zha, F.
Li, J.
Sun, P.
Wang, X.
Powiązania:
https://bibliotekanauki.pl/articles/173897.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystal fiber
polarization filter
finite element method
surface plasmon resonance
Opis:
A polarization photonic crystal fiber based on surface plasmon resonance is proposed in this paper. The photonic crystal fiber with gold coated holes is studied through using the finite element method. The impacts of structural parameters on the resonance characteristics are discussed. Numerical simulations show that the resonance wavelength can be modulated by changing the parameters of the air holes and thickness of gold layer. At the resonance wavelength 1550 nm, the loss is 3.8045 dB/m in x-polarization and the loss is 28464 dB/m in y-polarization by adjusting the size of the gold-coated holes and the place of air holes. Results show that the loss of y-polarized mode is much larger than the loss of x-polarized mode. The y-polarized mode is suppressed, and only x-polarized mode can be guided at the resonance wavelength of y-polarized mode. The results indicate that the mode polarized in one direction can be filtered out selectively by adjusting the diameter of air holes, and the filtering effect in a communication band is achieved.
Źródło:
Optica Applicata; 2018, 48, 4; 609-620
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controllable wavelength conversion based on soliton dynamics in mid-infrared fiber
Autorzy:
Shen, Kangle
Yang, Jian
Zhao, Jiayi
Yang, Xinyu
Yang, Hua
Powiązania:
https://bibliotekanauki.pl/articles/27310109.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
soliton dynamics
photonic crystal fiber
all-optical conversion switches
Opis:
We provide a convenient way to actively control the wavelength conversion of probe waves based on the soliton dynamics in the As2S3 fibers. In this paper, it is found by numerical calculation that wavelength conversion occurs in the frequency domain due to the existence of refractive index barrier. By adjusting the collision position of pump pulse and probe pulse to realize the conversion of probe pulse wavelength, the effect of the power and the incident wavelength of the probe wave on the wavelength conversion are also discussed. This frequency domain conversion is of great use in the mid-infrared region, for example, all-optical conversion switches.
Źródło:
Optica Applicata; 2023, 53, 3; 419--429
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Design of a Novel 1x4 Two-Dimensional Demultiplexer Based on Multicore Photonic Crystal Fiber
Autorzy:
Harrat, Assia Ahlem
Debbal, Mohammed
Ouadah, Mohammed Chamse Eddine
Powiązania:
https://bibliotekanauki.pl/articles/27311973.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Photonic Crystal Fiber
demultiplexer
light coupling
normalized power
light transmission
Opis:
This work suggests a brand-new 1*4 two-dimensional demultiplexer design based on multicore photonic crystal fiber. Numerical models show that the optical signals can be separated in a photonic crystal fiber construction using optical signals with wavelengths of 0.85, 1.1, 1.19, and 1.35 μm injected on the center core and separated into four cores. The innovative design switches different air-hole positions using pure silica layers throughout the length of the fiber to regulate the direction of light transmission between layers. Wavelength demultiplexers are essential parts of optical systemic communications. They serve as a data distributor and can use a single input to produce multiple outputs. The background material is frequently natural silica, and air holes can be found anywhere throughout the length of the fiber as the low-index components. The simulation results showed that after a 6 mm light propagation, the four-channel demux can start to demultiplex.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 469--473
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fosforanowe włókno fotoniczne o powiększonym rdzeniu domieszkowanym jonami Yb3+ do zastosowań laserowych
Yb3+ doped phosphate LMA photonic crystal fiber for laser applications
Autorzy:
Franczyk, M.
Stępień, R.
Pysz, D.
Kujawa, I.
Buczyński, R.
Powiązania:
https://bibliotekanauki.pl/articles/192050.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
Tematy:
światłowód fotoniczny
włókno aktywne
LMA PCF
światłowód o powiększonym rdzeniu
światłowód ze szkła fosforanowego
iterb
photonic crystal fiber
laser fiber
extended mode area fiber
phosphate fiber
ytterbium
Opis:
W publikacji przedstawiono prace wykonane w Instytucie Technologii Materiałów Elektronicznych dotyczące wytworzenia światłowodu fotonicznego wykonanego ze szkła fosforanowego z przeznaczeniem do konstrukcji lasera włóknowego. Wykonane zostały wytopy szkieł domieszkowanych i niedomieszkowanych. Na podstawie przeprowadzonych pomiarów spektralnych przeprowadzono analizę własności absorpcyjnych i emisyjnych wytworzonego szkła domieszkowanego. Zweryfikowano parametry dopasowania szkieł domieszkowanego i niedomieszkowanego pod kątem właściwości reologicznych i współczynnika załamania. Wytworzone zostało włókno laserowe ze szkła fosforanowego o strukturze dwupłaszczowej (double-clad) w pełni wykonanej w technologii fotonicznej. Poprzez zastosowanie włókna o powiększonej średnicy rdzenia uzyskano znaczne zwiększenie absorpcji promieniowania pompy i skrócenie długości lasera. Ponadto stosując płaszcz powietrzny osiągnięto rekordową wartość apertury numerycznej falowodu pompy we włóknie typu double-clad ze szkła fosforanowego wynoszącą 0,91. Maksymalna moc generacji w laboratoryjnym układzie lasera we włóknie o długości 19 cm wyniosła 12,4 W przy sprawności różniczkowej 42,8 %.
This paper presents the research work on a Yb3+ doped photonic crystal fiber laser with an extended mode area made of phosphate glass carried out at ITME. By increasing the mode area we obtained the laser with a higher power level and a shorter fiber length than before. The doped and undoped glass was manufactured and subsequently the measurements of optical and rheological properties were done. The analysis of both absorption and emission of the doped glass was performed. The fiber with the extended mode area was manufactured and its passive properties were examined. The numerical aperture of the pump waveguide was found to be very high and equaled 0.91, which is a record-breaking value for phosphate photonic structures and, at the same time, one of the highest values obtained for structures made of silica. We achieved laser generation from the 19 cm fiber with the maximum power of 12.4 W and the slope efficiency of 42.8 %.
Źródło:
Materiały Elektroniczne; 2013, T. 41, nr 3, 3; 3-8
0209-0058
Pojawia się w:
Materiały Elektroniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fotonika w systemach teleinformatycznych nowych generacji
Photonics for new generation of data transmission systems
Autorzy:
Szczepański, P.
Powiązania:
https://bibliotekanauki.pl/articles/317400.pdf
Data publikacji:
2009
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
fotonika
kryształy fotoniczne
krzemowe podzespoły
photonics
photonic crystal fiber
silicon components
Opis:
Omówiono wybrane aspekty związane z rozwojem badań nad przyrządami i zintegrowanymi systemami fotonicznymi, przeznaczonymi w szczególności do współpracy z przezroczystymi sieciami optycznymi nowych generacji, transmisją i przetwarzaniem danych.
The paper presents selected areas of research on devices and integrated photonic systems, in particular those intended for use in new generation transparent optical networks, data transmission and processing.
Źródło:
Telekomunikacja i Techniki Informacyjne; 2009, 3-4; 127-141
1640-1549
1899-8933
Pojawia się w:
Telekomunikacja i Techniki Informacyjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fusion Splicing and Testing of Photonic Crystal Fibers
Autorzy:
Borzycki, K.
Powiązania:
https://bibliotekanauki.pl/articles/308962.pdf
Data publikacji:
2009
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
fusion splicing
measurements
mechanical testing
photonic crystal fiber
polarization mode dispersion
temperature cycling
Opis:
Properties of two different photonic crystal fibers (PCF) were characterized, enabling comparisons. Properties investigated included spectral attenuation, polarization mode dispersion (PMD), optical time domain reflectometer characteristics, elastooptic factor describing transmission delay induced by axial strain plus effects of temperature cycling and fiber twist on PMD and loss. In particular, temperature and twist dependence of PMD was different for each fiber tested. For optical measurements, fibers were fusion spliced to pigtails with standard telecom single mode fibers. PCF splicing procedures and solutions adopted to minimize collapse of holes during arc fusion and splice loss are presented. It was found that fusion splicing procedure must be individually tailored to each combination of fibers.
Źródło:
Journal of Telecommunications and Information Technology; 2009, 1; 72-81
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fusion splicing: the penalty of increasing the collapse length of the air holes in ESM-12B photonic crystal fibers
Autorzy:
Adnan, S. A.
Abdulwahhab, A. W.
Ismail, S.N.
Powiązania:
https://bibliotekanauki.pl/articles/174083.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
photonic crystal fiber
PCF
collapse length
mode field diameter
MFD
fusion splicing
guiding mechanisms
Opis:
For optimum fusion splicing process of a photonic crystal fiber, the collapsing of the air holes at any photonic crystal fiber is the key point of either increasing or decreasing the total splice loss. In this paper, an experimental study has been carried out to investigate the relation between total splice loss or total fiber attenuation due to splice loss and the length of the collapsed region of the air holes. This is done by splicing ESM-12B photonic crystal fiber between two equal lengths of single mode fibers and measuring the attenuation at different arc times and arc powers. The results showed that the increase in the length of the collapsed air holes region results in higher loss, therefore, higher fiber attenuation.
Źródło:
Optica Applicata; 2016, 46, 2; 265-275
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-loss connection of hybrid fibre optic systems with low sensitivity to wavelength
Autorzy:
Skorupski, K.
Powiązania:
https://bibliotekanauki.pl/articles/220977.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
photonic-crystal fiber
measurement of mode-field diameter
fiber characterization
beam combining
Opis:
This paper proposes a method for adjusting light waves propagating in systems composed of photonic fibers, light sources and detection elements. The paper presents the properties of these connections in terms of the loss of signal transmission. Different fiber core areas were analyzed, and measurements of the mode-field diameters (MFDs) of selected fiber structures are presented. The study analyzed two types of LMA (Large Mode Area) fiber structures, and the mode-field diameters of these structures were measured on the basis of the radiation distribution obtained under near-field conditions. The results are compared to the values obtained for a SMF-28 single-mode fiber. The LMA structures analyzed in the paper are characterized by low sensitivity of the MFD parameter to the length of transmitted waves, which creates the possibility of their use as intermediate fibers when connecting optical fibers of different diameters. In the wavelength range from 800 nm to 1600 nm, a 3.5% MFD change was observed for the first investigated LMA structure, and a 1% change was observed for the second. In addition, measurements of the mode-field diameters were also made using the transverse offset method for comparison of the results.
Źródło:
Metrology and Measurement Systems; 2013, 20, 4; 697-704
0860-8229
Pojawia się w:
Metrology and Measurement Systems
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
Tytuł:
Microarray-core based circular photonic crystal fiber for high chemical sensing capacity with low confinement loss
Autorzy:
Asaduzzaman, S.
Ahmed, K.
Powiązania:
https://bibliotekanauki.pl/articles/174575.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
circular photonic crystal fiber
confinement loss
elliptical core
chemical sensor
relative sensitivity
Opis:
In this article, a circular photonic crystal fiber based chemical sensor has been presented where core region is designed with an array of elliptical holes. The proposed structure is numerically investigated by using a full vectorial finite element method. From the numerical results, it is observed that introducing an array of elliptical holes helps to obtain the high relative sensitivity and realizes a low confinement loss. In addition, the increase in the value of the diameter of holes in the innermost ring enhances the relative sensitivity. Moreover, the increase in the value of the diameter of holes in the outermost ring reduces the confinement loss. In this work, we have considered an industrially valuable chemical ethanol. Simulation results disclose that the highest relative sensitivity of proposed photonic crystal fiber is 29.25% for ethanol and the confinement loss is 7.68 × 10–7 dB/m at the wavelength 1.5 µm.
Źródło:
Optica Applicata; 2017, 47, 1; 41-49
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
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:
Multi-parameter measurement under fiber bending based on directional resonance coupling in photonic crystal fibers
Autorzy:
Tan, C.
Wang, Q.
Ding, Y.
Li, H.-W.
Wang, M.
Liu, H.
Powiązania:
https://bibliotekanauki.pl/articles/174320.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fiber bending
multi-parameter measurement
photonic crystal fiber
fiber sensing
Opis:
A multi-parameter sensor with enhanced sensitivity based on magnetic fluids infiltrated photonic crystal fiber is proposed. The sensing performances are investigated using the mode coupling theory and finite element method. Four symmetrical defective channels are assembled into the photonic crystal fiber to produce two resonant transmission dips λCV and λCH in vertical and horizontal directions, respectively. Each dip can be split into two relatively shallow dips (λCV1, λCV2 or λCH1, λCH2) when the photonic crystal fiber is bent. Interestingly, the values of (λCH2 – λCH1) and (λCV2 – λCV1) are associated with corresponding bend-curvature but almost unaffected by external temperature or magnetic field. On the contrary, the values of (λCH2 + λCH1)/2 and (λCV2 + λCV1)/2 are sensitive to temperature or magnetic field regardless of the bending condition. Based on above characteristics and the dependence of the magnetic fluids refractive index on temperature and magnetic field, the proposed sensor can measure not only the bend-curvature and bend-direction, but also the temperature and magnetic field.
Źródło:
Optica Applicata; 2018, 48, 3; 449-462
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
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