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    Wyświetlanie 1-5 z 5
    Tytuł:
    Research on the X-ray wavelength division multiplexing technology for blackout region communication
    Autorzy:
    Li, Yao
    Su, Tong
    Sheng, Lizhi
    Xu, Neng
    Zhao, Baosheng
    Powiązania:
    https://bibliotekanauki.pl/articles/1835966.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    X-ray communication
    plasma sheath
    wavelength division multiplexing
    Opis:
    After the concept of X-ray communication was proposed, its application in complex electromagnetic environment has received more attention, such as data transmission in re-enter special electro-magnetic condition. In this article, a new type of X-ray source was introduced firstly, which was expected to generate multiple characteristic lines and achieve wavelength division multiplexing technology in X-ray band. Then an experimental platform was built for analyzing transmission characteristics of X-ray photon in various plasma media. Finally, the calculation model for a link power equation was given. Experiment results show that transmittance of 8–18 keV X-ray signal is relatively stable, atomic numbers from 29 to 42 are the most suitable materials for wavelength division multiplexing, the X-ray communication system is expected to realize about 200 kbps data transmission rate in adjacent space.
    Źródło:
    Optica Applicata; 2020, 50, 4; 619-632
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    100G shortwave wavelength division multiplexing solutions for multimode fiber data links
    Autorzy:
    Cimoli, B.
    Estaran Tolosa, J. M.
    Rodes Lopez, G. A.
    Vegas Olmos, J. J.
    Monroy, I. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/173811.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vertical-cavity surface-emitting laser (VCSEL)
    multimode fiber
    MMF
    wavelength division multiplexing
    WDM
    Opis:
    We investigate an alternative 100G solution for optical short-range data center links. The presented solution adopts wavelength division multiplexing technology to transmit four channels of 25G over a multimode fiber. A comparative performance analysis of the wavelength-grid selection for the wavelength division multiplexing data link is reported. The analysis includes transmissions over standard optical multimode fiber (OM): OM2, OM3 and OM4.
    Źródło:
    Optica Applicata; 2016, 46, 3; 409-419
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance analysis of two-dimensional photonic crystal octagonal ring resonator based eight channel demultiplexer
    Autorzy:
    Kannaiyan, V.
    Dhamodharan, S. K.
    Savarimuthu, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/174789.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    two-dimensional photonic crystals
    photonic band gap
    ring resonator
    waveguide
    demultiplexer
    wavelength division multiplexing
    Opis:
    We proposed a high performance eight channel demultiplexer using two-dimensional photonic crystal octagonal ring resonator for wavelength division multiplexing applications. The performance parameters such as transmission efficiency, Q factor, spectral width, resonant wavelength, crosstalk and channel spacing of the proposed demultiplexers are evaluated. The plane wave expansion method manipulates photonic band gap of periodic and non-periodic structure. Finite-difference time-domain method is used to evaluate the performance parameters of designed two-dimensional photonic crystal structure. The proposed demultiplexer provides overall transmission efficiency, Q factor, spectral width of about 98%, 1968 and 0.8 nm, respectively. The ultra-compact eight channel demultiplexer performs better than the reported one. Hence this work can be implemented for real time applications.
    Źródło:
    Optica Applicata; 2017, 47, 1; 7-18
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crosstalk Noise Aware System For WDM-Based Optical Network on Chip
    Autorzy:
    Jedidi, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/225975.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical network on chip
    wavelength division multiplexing
    crosstalk noise
    detection crosstalk
    waveguide
    optical router
    Opis:
    Network on chip (NoC) is presented as a promising solution to face off the growing up of the data exchange in the multiprocessor system-on-chip (MPSoC). However, the traditional NoC faces two main problems: the bandwidth and the energy consumption. To face off these problems, a new technology in MPSoC, namely, optical network-on-chip (ONoC) has been introduced which it uses the optical communication to guaranty a high performance in communication between cores. In addition, wavelength division multiplexing (WDM) is exploited in ONoC to reach a high rate of bandwidth. Nevertheless, the transparency nature of the ONoC components induce crosstalk noise to the optical signals, which it has a direct effect to the signal-to-noise ratio (SNR) then decrease the performance of the ONoC. In this paper, we proposed a new system to control these impairments in the network in order to detect and monitor crosstalk noise in WDM-based ONoC. Furthermore, the crosstalk monitoring system is a distributed hardware system designed and test with the different optical components according the various network topology used in ONoC. The register-transfer level (RTL) hardware design and implementation of this system can result in high reliability, scalability and efficiency with running time less than 20 ms.
    Źródło:
    International Journal of Electronics and Telecommunications; 2019, 65, 3; 497-505
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    RoFnet - Reconfigurable Radio over Fiber Network Architecture Overview
    Autorzy:
    Medeiros, M.
    Avó, R.
    Laurencio, P.
    Correia, N.
    Barradas, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/308954.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    optical access networks
    optical single sideband
    radio over fiber
    reflective semiconductor optical amplifiers
    wavelength division multiplexing
    Opis:
    This paper introduces the basic operational concepts of the RoFnet - reconfigurable radio over fiber network, which is a project supported by the Portuguese Foundation forScience and Technology. This project proposes an innovative radio over fiber optical access network architecture, which combines a low cost base station (BS) design, incorporating reflective semiconductor optical amplifiers, with fiber dispersion mitigation provided by optical single sideband modulation techniques. Optical wavelength division multiplexing (WDM) techniques are used to simplify the access network architecture allowing for different BSs to be fed by a common fiber. Different wavelength channels can be allocated to different BSs depending on user requirements. Additionally, in order to improve radio coverage within a cell, it is considered a sectorized antenna interface. The combination of subcarrier multiplexing with WDM, further simplifies the network architecture, by using a specific wavelength channel to feed an individual BS and different subcarriers to drive the individual antenna sectors within the BS.
    Źródło:
    Journal of Telecommunications and Information Technology; 2009, 1; 38-43
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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