Temat: optical - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development of optical fiber technology in Poland
Autorzy:: Wójcik, W.
Romaniuk, R. S.
Powiązania:: https://bibliotekanauki.pl/articles/227013.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical fiber technology
manufacturing/fabrication of optical fibers
photonics
optoelectronics
photonic optical fibers
microstructured optical fibres
polymer optical fibers
optical polymers
silica glass
optical fiber glass
Opis:: Optical fiber technology is an important branch of science and technology, but also economy. Together with related disciplines it creates wider areas like optoelectronics and photonics. Optical fiber technology is developed in this country rather dynamically, proportionally to the available funds designed locally for research and applications. Recently this development was enhanced with considerable funds from European Operational Funds Innovative Economy POIG and Human Capital POKL. The paper summarizes the development of optical fiber technology in Poland from academic perspective during the period of last 2-3 years. Probably the digest is not very not full. An emphasis is put on development of optical fiber manufacturing methods. This development was illustrated by a few examples of optical fiber applications.
Źródło:: International Journal of Electronics and Telecommunications; 2010, 56, 1; 99-104
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Instrumentation optical fibres for wave transformation, signal processing, sensors, and photonic functional components, manufactured at Białystok University of Technology in Dorosz Fibre Optics Labolatory
Autorzy:: Romaniuk, R. S.
Powiązania:: https://bibliotekanauki.pl/articles/202181.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical fibres
specialty optical fibres
soft glass optical fibres
nontelecom optical fibres
optical fibre photonics
multicore optical fibres
optical fibre microoptics
optical capillaries
photonic fibres
structural optical fibres
signal processing in optical fibres
Białystok University of Technology
Opis:: Tailored, specialty optical fibres, made of complex glasses, called collectively as a non-telecommunications or instrumentation family, serve for various optical wave transformations for particular functional purposes and optical signal processing, rather than for long distance lossless and dispersionless, undistorted transmission. Research work on these fibres started during the late seventies of the last century in ITME/Warsaw and in Białystok University of Technology at the Faculty of Electrical Engineering. The initiator of this research at Glass Works Białystok [39] and Białystok University of Technology [4] was, then a very young engineer, Jan Dorosz. Over 35 years of development of the technological team, under his skilful management, resulted in a top laboratory which today does research at the cutting edge of the photonics science. The Białystok Optical Fibre Technology Laboratory (OFTL) is now a pearl in the crown of his Alma Mater. The paper opens this special issue of the PAS Bulletin on Technical Sciences, devoted to professor Jan Dorosz, and shows some of the developments in the area of optical fibre photonics, which were carried out at his active laboratory.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 607-618
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fiber diameter influence on optical transport of dielectric particles along subwavelength optical fibers
Autorzy:: Zhang, Y.
Lei, H.
Li, B.
Powiązania:: https://bibliotekanauki.pl/articles/173195.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: optical transport
optical scattering force
optical gradient force
subwavelength optical fiber
evanescent field
Opis:: We investigate a fiber diameter influence on optical transport of dielectric particles along subwavelength optical fibers using a near infrared laser of 1.55 μm wavelength. Theoretical analysis indicates that at 1.55 μm, the evanescent field at the fiber surface increases at first and then decreases with an increase of the fiber diameter from 600 nm to 1.6 μm, exhibiting a maximum at the fiber diameter of 950 nm. Based on three-dimensional finite-difference time-domain simulations, optical scattering forces acted on the dielectric particles and transport velocities of the particles were calculated for two fibers in the diameters of 930 nm and 1.5 μm. To support the theoretical analysis, experiments were performed using the two fibers to transport SiO2 particles (sizes of 530 nm and 1.5 μm) and TiO2 particles (size of 1.5 μm). The results show that with the same laser power launched into the two fibers, larger transport velocities can be obtained along the 930 nm diameter fiber.
Źródło:: Optica Applicata; 2013, 43, 4; 707-718
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Opportunities for the out of the 1550 nm Window transmission
Możliwości wykorzystania transmisji poza pasmem 1550 nm
Autorzy:: Turkiewicz, Jarosław Piotr
Powiązania:: https://bibliotekanauki.pl/articles/408278.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: optical communication
optical fibre
optical amplifier
komunikacja optyczna
światłowód
wzmacniacz optyczny
Opis:: In this paper, opportunities for transmission in the 850 nm and 1310 nm windows are reviewed. In particular, the mentioned windows can be utilized for the data centre related transmission.
W artykule dokonano analizy możliwości wykorzystania okien transmisyjnych 850 nm i 1310 nm. Rozważane okna można wykorzystać do realizacji transmisji dla potrzeb centrów danych.
Źródło:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2019, 9, 2; 4-7
2083-0157
2391-6761
Pojawia się w:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Creating the optical bistable switch in the dielectric slab doped with asymmetric semiconductor quantum wells
Autorzy:: Nasehi, R.
Powiązania:: https://bibliotekanauki.pl/articles/174447.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: optical bistability
optical multistability
dielectric slab
Opis:: We have investigated the optical switching in a dielectric slab with a novel configuration of solid-state medium. This new scheme combines the attractive features of all-optical switching in dielectric medium doped with asymmetric quantum well nanostructure with the ability to convert the optical bistability to multistability (or vice versa) by using the strength of Fano interference and the energy splitting effect. The dependence of optical bistability behavior on the intensity of the strong coupling field and the slab thickness is also given.
Źródło:: Optica Applicata; 2016, 46, 4; 541-551
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Pęseta optyczna jako narzędzie współczesnej bioinżynierii
Optical tweezers as a tool of modern bioengineering
Autorzy:: Bacia, M.
Drobczyński, S.
Masajada, J.
Kopaczyńska, M.
Powiązania:: https://bibliotekanauki.pl/articles/262117.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
Tematy:: pęseta optyczna
pułapki optyczne
nanomanipulator optyczny
optical tweezer
optical trapping
optical nanomanipulator
Opis:: Pęseta optyczna jest dość nowym narzędziem pozwalającym na wszechstronną manipulację obiektami w mikro- i nanoskali. Manipulacja odbywa się wewnątrz odpowiednio ukształtowanej zogniskowanej wiązki laserowej. Wykorzystując technikę holograficzną, można za pomocą pęsety optycznej utworzyć kilkanaście niezależnych pułapek optycznych, zdolnych do chwytania mikroobiektów. Urządzenie to wykorzystuje się między innymi do pomiaru sił z rozdzielczością pojedynczych pikoniutonów, segregacji komórek, pomiaru właściwości mechanicznych błon komórkowych, nici DNA lub do badania procesów biochemicznych na poziomie komórkowym. W niniejszej pracy przedstawiano krótki opis techniczny zbudowanych w zespole układów, jak również omówiono przykładowe zastosowania pęsety optycznej.
Optical tweezers are a quite new tool for versatile manipulation of objects in micro and nanoscale. Optical tweezers may be used in various fields, for example in microbiology. The observation and measurement take place inside the specially focused laser beam. The holographic methods enables generating several optical traps that can be driven, independently. The possible applications include the force measurement between molecules and cells (at the level of piconewtons), cells segregation and transport, cells activity analysis, DNA mechanical properties analysis and many others. In this paper, short technical data on the systems constructed in our group, along with the description of potential applications, are presented.
Źródło:: Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2013, 19, 3; 114-122
1234-5563
Pojawia się w:: Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Polygonal micro-whirlpools induced in ferrofluids
Autorzy:: Bacia, M
Lamperska, W
Masajada, J
Drobczynski, S
Marc, M
Powiązania:: https://bibliotekanauki.pl/articles/173951.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: ferrofluid
hexagonal whirlpool
optical vortex
optical tweezers
Opis:: We report on the observation of the polygonal whirlpools in the thin layer of ferrofluid under illumination with a laser beam carrying optical vortex and in the presence of a vertical magnetic field. This kind of structures have attracted attention after discovering a hexagonal storm in Saturn’s atmosphere. Our polygonal whirlpools were created in a closed system (no free surfaces) in micro-scale (whirlpool diameter <20 μm) by the use of holographic optical tweezers. The polygonal shape was changed by varying the magnetic field strength or value of the optical vortex topological charge.
Źródło:: Optica Applicata; 2015, 45, 3; 309-316
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Output-input properties of incident light on a defect dielectric slab with quantum dot nanostructure
Autorzy:: Jafarzadeh, Hossein
Powiązania:: https://bibliotekanauki.pl/articles/174095.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: quantum dot nanostructure
optical bistability
optical multistability
Opis:: We demonstrate output-input properties of incident light in a defect slab doped by three-level quantum dot nanostructure via quantum coherence and Fano-interference phenomena. Here, we will show that the output-input properties of the system can be adjusted by the Fano-interference strength, amplitude and the relative phase of the driving fields, respectively. Also, we consider the thickness effect of defect medium on controlling the output-input behaviors of probe light. Moreover, we realize that it is possible to switch between optical bistability and optical multistability by optimizing the conditions which are more practical in all-optical switching based nanoscale devices.
Źródło:: Optica Applicata; 2019, 49, 1; 101-113
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Optical Fiber Technology 2012
Autorzy:: Romaniuk, R. S.
Wójcik, W.
Powiązania:: https://bibliotekanauki.pl/articles/226186.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: lightguide
optical fiber
photonics
optical fiber photonics
optoelectronics
optical fiber technology
optical fiber glasses and polymers
active optical fibers
photonic optical fibers
microstructured optical fibres
microoptics
photonic materials and metamaterials
fiber lasers
Opis:: The Conference on Optical Fibers and Their Applications, Nałęczów 2012, in its 14th edition, which has been organized since more than 35 years, has summarized the achievements of the local optical fiber technology community, for the last year and a half. The conference specializes in developments of optical fiber technology, glass and polymer, classical and microstructured, passive and active. The event gathered around 100 participants. There were shown 60 presentations of 20 research and application groups active in fiber photonics, originating from academia and industry. Topical tracks of the Conference were: photonic materials, planar waveguides, passive and active optical fibers, propagation theory in nonstandard optical fibers, and new constructions of optical fibers. A panel discussion concerned teaching in fiber photonics. The conference was accompanied by a school on Optical Fiber Technology. The paper summarizes the chosen main topical tracks of the conference on Optical Fibers and Their Applications, Nałęczów 2012. The papers from the conference presentations will be published in Proc. SPIE, including a conference version of this paper. The next conference of this series is scheduled for January 2014 in Białowieża.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 2; 131-140
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Design of all-optical time-division multiplexing scheme with the help of microring resonator
Autorzy:: Rakshit, J K
Roy, J N
Powiązania:: https://bibliotekanauki.pl/articles/173771.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: all-optical multiplexing
all-optical signal processing
optical logic gate
optical time-division multiplexing (OTDM)
microring resonator
Opis:: Optical time-division multiplexing is a natural multiplexing technique leading to terabit/s transmission capacity for many services that will be found in near future optical telecommunication networks. In this paper we have conducted a theoretical study of all-optical time-division multiplexing switching using GaAs-AlGaAs based microring resonator together with performances characteristics. The proposed circuit is more compact, simple and will be helpful in designing all-optical telecommunication circuits in near future. Numerical simulation results confirming described methods are given in this paper.
Źródło:: Optica Applicata; 2014, 44, 1; 39-54
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Brillouin backscattering analysis in recent generation of telecom optical fibers
Autorzy:: Lakomski, Mateusz
Tosik, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/2172828.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: Brillouin backscattering
optical fibre
optical fibre application
optical fibre sensor
strain measurement
Opis:: This paper reports on examination of the latest generation of telecom optical fibers for the Brillouin backscattering strain sensor application. Over 30 fibers from 5 different manufactures have been tested in terms of their ability to create a stable and accurate strain sensor. It has been proved that fibers that belong to the same standard, according to ITU-T (International Telecommunication Union), and even if provided by one manufacturer, demonstrate fundamentally different Brillouin backscattering response. It has been shown that unimodal Brillouin spectrum cannot be treated as the main parameter for fiber selection. In order to achieve accurate and reproducible results of strain measurement, it is necessary to perform initial examination of the fibers over the range of laser pulse width.
Źródło:: Optica Applicata; 2022, 52, 3; 405--416
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Readout System and Data Processing for OCT Pachymetry
Autorzy:: Dziewiecki, M.
Domański, G.
Frey, W.
Konarzewski, B.
Kurjata, R.
Marzec, J.
Smolnik, A.
Zaremba, K.
Ziembicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/226782.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical coherence tomography
pachymetry
optical signal detection
Opis:: A complete system for measurement control, signal acquisition and data processing for an OCT pachymeter is described. Moreover, dedicated data processing algorithm used for noise reduction is presented. A simple OCT scanner was built and some measurements were performed to examine the capabilities of the system.
Źródło:: International Journal of Electronics and Telecommunications; 2010, 56, 3; 223-230
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Labeling of signals in optical networks and its applications
Autorzy:: Borzycki, K.
Powiązania:: https://bibliotekanauki.pl/articles/308136.pdf
Data publikacji:: 2004
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: optical fiber transmission
transparent optical network
pilot tone
network management
overhead data channel
optical fiber dispersion
optical label
Opis:: The paper is a review and comparative analysis of most common techniques proposed to attach additional data or identification information to digital signals in optical fiber networks by purely optical means. Such "labels" or "headers" can be attached either to continuous bit streams, e.g., in SDH networks or to optical packets. They enable to monitor, route and identify signals in transparent optical networks, especially those with optical wavelength multiplexing, allow management and supervision of remote optical amplifiers and can be used in optical switching systems. Other applications of this relatively unknown technology include monitoring of optical path dispersion, equalization of channels in DWDM systems and detection of intrusion or jamming in highly secure networks.
Źródło:: Journal of Telecommunications and Information Technology; 2004, 2; 73-88
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Analysis of optical-microwave mixing process in electro-optical modulators
Autorzy:: Galwas, B.A.
Szczepaniak, Z.R.
Powiązania:: https://bibliotekanauki.pl/articles/308368.pdf
Data publikacji:: 2001
Wydawca:: Instytut Łączności - Państwowy Instytut Badawczy
Tematy:: electro-optical modulator
nonlinear effects
microwave-optical mixing
Opis:: The principle of operation and the general parameters of the electro-optical Mach-Zehnder modulators are reminded in the paper. With the use of the mathematical relationships describing the transmission of the optical signal through the modulator, the theoretical model of the optical signal transmission with two modulating signals at two frequencies will be presented. The theoretical relationships describing the efficiency of the optical-microwave mixing and frequency multiplying in the two-tone operation will be derived. The analysis and the simulations will be performed for different operating points, where the nonlinearity of the transmission characteristic is specially strong.
Źródło:: Journal of Telecommunications and Information Technology; 2001, 2; 57-63
1509-4553
1899-8852
Pojawia się w:: Journal of Telecommunications and Information Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Optical multiple-image encryption in discrete multiple-parameter fractional Fourier transform scheme using complex encoding, theta modulation and spectral fusion
Autorzy:: Luan, Guangyu
Zhong, Zhi
Shan, Mingguang
Powiązania:: https://bibliotekanauki.pl/articles/1835767.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: optical security
optical encryption
multiple images
multiplexing
crosstalk
Opis:: We present a novel encryption method for multiple images in a discrete multiple-parameter fractional Fourier transform scheme, using complex encoding, theta modulation and spectral fusion. All pairs of original images are encoded separately into a complex signal. The spectrum of each complex signal can then be scattered into various positions in the spectral plane and multiplexed into one spectral image with a combination of theta modulation and spectral fusion. After Fourier transforming back to the spatial domain, the multiplexed signal is encrypted in the discrete multiple-parameter fractional Fourier transform domain. Information about the original images can only be successfully decrypted given the possession of all correct keys. The parameters of chaotic pixel scrambling for the proposed method enlarge the key space. Moreover, the proposed method solves the crosstalk problem of multiple images and improves the multiplexing capacity. Numerical simulations demonstrate the effectiveness of the proposed method.
Źródło:: Optica Applicata; 2021, 51, 1; 121-134
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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