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    Wyświetlanie 1-6 z 6
    Tytuł:
    All-optical parity generator and checker circuit employing semiconductor optical amplifier-based Mach–Zehnder interferometers
    Autorzy:
    Kaur, S.
    Shukla, M. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/173209.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    optical computing
    semiconductor optical amplifier (SOA)
    semiconductor optical amplifier -based Mach–Zehnder interferometer (SOA-MZI)
    XOR gate
    parity generator
    parity checker
    Opis:
    Checking the parity of the data signal during transmission and reception is one way to ensure errorless transmission of data. In this communication the authors propose a method to implement an all-optical parity generator and checker using semiconductor optical amplifier-based Mach–Zehnder interferometers. The scheme, able to process input signals at the same wavelength, is characterized using return-to-zero modulated signals at 10 Gb/s. Correct logic bit sequences and clear open eye patterns with extinction ratios exceeding 10 dB are achieved. Simple structure and potential for integration make this architecture an interesting approach in photonic computing and optical signal processing.
    Źródło:
    Optica Applicata; 2017, 47, 2; 263-271
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of the SOA Deep Saturation and Power Averaging Effect to Counteract Intra-Channel Crosstalk in DWDM System
    Autorzy:
    Dyc, F. M.
    Mazurek, P.
    Turkiewicz, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/308974.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    cross-gain modulation
    Dense Wavelength Division Multiplexing
    Semiconductor Optical Amplifier
    Opis:
    The Semiconductor Optical Amplifier (SOA) is a key component of cost-effective short/medium range transmission systems. However it can introduce signal distortions. In this paper the authors investigate the possibility to reduce the signal distortions in SOA operating with the multiple wavelength channels. Using numerical simulations the negative influence of the nonlinear effects, namely cross-gain modulation (XGM) and the patterning effect can be reduced in deep SOA saturation regime. The self-healing effect is pronounced for the 4 or more wavelength channels and the transmitted symbol length longer than double of the SOA recovery time.
    Źródło:
    Journal of Telecommunications and Information Technology; 2014, 2; 22-28
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of slow and fast light effect in semiconductor optical amplifier with certain facet reflection
    Autorzy:
    Qin, Cui
    Jiang, Yu
    Zhen, Li
    Powiązania:
    https://bibliotekanauki.pl/articles/2172851.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    semiconductor optical amplifier
    slow light
    fast light
    coherent population oscillation
    Opis:
    In this paper, the slow and fast light (SFL) effects of the semiconductor optical amplifier (SOA) having certain facet reflections are theoretically investigated. The theoretical model is used to account for the SFL phenomenon causing the coherent population oscillation. The influence of the current modulation frequency, the value of the current, the linewidth enhancement factor, facet reflectivity as well as the relative phase of the modulated current on the phase delay in the SOA are studied. It is demonstrated that the SFL effect could be controlled by the modulation frequency, the value and relative phase of the current. Finally, it is shown that the magnitude of the SFL delay could be tuned by a change in the linewidth enhancement factor as well as the facet reflectivity of the SOA.
    Źródło:
    Optica Applicata; 2022, 52, 4; 655--667
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on a scheme of generating ultra-wideband doublet signal based on the cross-gain modulation in a semiconductor optical amplifier
    Autorzy:
    Zhang, K.
    Shao, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/173646.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ultra-wideband
    UWB
    semiconductor optical amplifier
    SOA
    cross-gain modulation
    XGM
    Opis:
    We propose a novel scheme for generating ultra-wideband doublet signal based on the cross-gain modulation effect in a semiconductor optical amplifier. This scheme requires only a semiconductor optical amplifier and an optical source. By using OptiSystem software, we simulate and analyze the effect of the input signal light power and wavelength, the pulse width and injection current on the generated doublet pulse. In addition, the optimal range of parameters are also given in the simulation process.
    Źródło:
    Optica Applicata; 2018, 48, 1; 127-135
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    All-optical vestigial sideband carrier suppressed return-to-zero to non-return-to-zero format conversion based on spectral filtering from a cross-phase modulated signal
    Autorzy:
    Metya, Sanjeev Kumar
    Powiązania:
    https://bibliotekanauki.pl/articles/173795.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cross-phase modulation
    dispersion shifted fiber
    return-to-zero
    semiconductor optical amplifier
    vestigial sideband carrier suppressed
    Opis:
    An all-optical vestigial sideband carrier suppressed return-to-zero to non-return-to-zero format conversion is presented with the help of simulation using cross-phase modulation in a nonlinear dispersion shifted fiber. For comparative analysis, a semiconductor optical amplifier based conversion is also considered. Through the process of spectral filtering, the wavelength converted output signal is recovered from a broadened optical spectrum. Error-free conversion of vestigial sideband carrier suppressed return-to-zero pulses to non-return-to-zero format is presented at 10 Gb/s using a 210 − 1 bit sequence and is able to transmit the recovered data through a distance of 50 km having a power penalty of around 1.38 dB in the case of dispersion shifted fiber, whereas a semiconductor optical amplifier performs abysmally.
    Źródło:
    Optica Applicata; 2019, 49, 2; 275-282
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the configuration and performance limitation parameters in optical amplifiers
    Autorzy:
    Ab-Rahman, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/173365.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    semiconductor optical amplifiers (SOA)
    erbium-doped fibre amplifier (EDFA)
    Raman
    amplifier
    Opis:
    Optical amplifiers are realised in a wide range of applications, such as metro – dense wavelength division multiplexing and cable television networks. These applications require the amplifier to provide a maximum output power level by accepting an input power near the saturation level. To obtain an ideal amplifier according to several parameters, the erbium concentration in the composite core glass, the optimum length of the fibre, the pump saturation and the input signal signaltonoise ratio must be critically studied and addressed. In this paper, we will review the types of optical amplifiers used in communication systems today as well as the parameters that limit the performance of optical amplifiers in the network, such as the noise figure, the gain saturation, the polarisation dependence gain and inhomogeneous broadening effects. Based on the performance limitation factor, we model the amplifier gain profile and the effect of the gain value on the network performance. Finally, we propose various configurations of an optical amplifier, and the advantages of each amplification technique are highlighted.
    Źródło:
    Optica Applicata; 2014, 44, 2; 251-266
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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