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    Wyświetlanie 1-7 z 7
    Tytuł:
    Eight-Channel Optical Add Drop Multiplexer Based on Ring Resonator Using LNOI Channel Waveguides
    Autorzy:
    Kumar, H.
    Janyani, V.
    Buryy, O.
    Ubizskii, S.
    Sugak, D.
    Singh, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030850.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.Sz
    Opis:
    In this paper we report on an eight-channel optical add drop multiplexer based on ring resonator using lithium niobate on insulator channel waveguides. It is suitable for a DWDM-GPON network with channel spacing of 100 GHz in C-band and data rate is 10 Gbps. The insertion loss at the drop port is maximum 1.2 dB and the Q-factor is 1636. It can be used as multiplexer as well as demultiplexer in 8-channel DWDM systems.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 997-999
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two-Wave Multi/Demultiplexer on the Base οf Gradient Index Multimode Interference Structures Made by $Ag^{+}-Na^{+}$ Ion Exchange
    Autorzy:
    Błahut, M.
    Bazan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795784.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.Sz
    42.82.Et
    Opis:
    The paper presents optimizing investigations by the beam propagation method method of two-wave multi/demultiplexer which uses gradient index multimode interference structures made by $Ag^{+}-Na^{+}$ ion exchange in BK-7 glass. We have discussed the influence of the structure geometry and technological process parameters for selected wavelength combinations within the range of 635÷ 850 nm. We have described operating parameters of the multiplexers - excess losses and contrasts. We have also presented the way of finding approximate MMI section widths and lengths which satisfy the multiplexing condition.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 264-267
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of Nonlinear Crosstalk in Optical Fibre Wavelength-Division Multiplexed Telecommunication Systems
    Autorzy:
    Szczęsny, W.
    Marciniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2008299.pdf
    Data publikacji:
    1999-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.-i
    42.79.Sz
    Opis:
    Nonlinear effects in optical fibres play an important role for transmission parameters in wavelength-division multiplexed telecommunication systems. Those effects cause an additional attenuation, distortion and inter-channel interference of the multi-wavelength optical signal. Therefore, it is important to optimise inter-channel wavelength span in a wavelength-division multiplexed system, and also the optical power and transmission bit-rate. Another drawback is a limitation of the number of the transmitted optical channels and network nodes. The paper reports the results of the analysis and computer simulations of the wavelength-division multiplexed transmission through fibre link in a presence of nonlinear effects: self-phase modulation, cross-phase modulation, Raman scattering, four-wave mixing. The analysis enables network designers to evaluate the system performance and to optimise transmission parameters.
    Źródło:
    Acta Physica Polonica A; 1999, 95, 5; 859-867
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Secure Communication with a Publicly Known Key
    Autorzy:
    Beige, A.
    Englert, B.-G.
    Kurtsiefer, Ch.
    Weinfurter, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2030467.pdf
    Data publikacji:
    2002-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.67.Dd
    42.79.Sz
    Opis:
    We present a scheme for direct and confidential communication between Alice and Bob, where there is no need for establishing a shared secret key first, and where the key used by Alice even will become known publicly. The communication is based on the exchange of single photons and each and every photon transmits one bit of Alice's message without revealing any information to a potential eavesdropper.
    Źródło:
    Acta Physica Polonica A; 2002, 101, 3; 357-368
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polarization Sensitive Optical Coherence Tomography with Spectroscopic Analysis
    Autorzy:
    Strąkowski, M.
    Pluciński, J.
    Kosmowski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493325.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.-e
    42.87.-d
    42.79.Sz
    42.79.Ta
    Opis:
    The optical coherence tomography is an optical measurement technique used for investigation of wide range of scattering or semitransparent materials. The optical coherence tomography enables surface and subsurface examination of different types of materials to be performed in non-contact and non-destructive way. Our research have been concentrated on optical coherence tomography systems with polarization sensitive analysis. Such a combination of optical measurements methods improves optical coherence tomography visualization contrast and also delivers some extra information about investigated devices. However, applying polarization sensitive analysis is associated with problems related to the use of ultra broadband optical sources. We have managed studies on the improvement of signal processing method. According to obtained results the problem of signal processing method in polarization sensitive optical coherence tomography can be solved by the use of the spectroscopic analysis. In this paper we present a brief discussion about the polarization sensitive optical coherence tomography measurements supported by spectroscopic analysis of backscattered light from investigated device.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 785-788
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cavity Enhanced Absorption Spectroscopy Sensor
    Autorzy:
    Nowakowski, M.
    Wojtas, J.
    Bielecki, Z.
    Mikołajczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807740.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.50.Qx
    42.79.Sz
    43.60.-c
    07.07.Df
    Opis:
    The paper presents opportunities of cavity enhanced absorption spectroscopy technique application in nitrogen oxides (NO_{x}) detection. In this method the concentration of an absorbing gas is determined by measure of decay time of the light pulse trapped in an optical cavity. The measurements are not sensitive to fluctuation of both laser power and photodetector sensitivity. The cavity enhanced absorption spectroscopy technique is a modification of cavity ring down spectroscopy technique where the off-axis adjustment of the resonator is used. NO_{x} detection is carried out in the visible and infrared range. The signal is registered with a developed low noise photoreceiver. Features of the presented sensor show that it is possible to build a portable trace gases sensor. Its sensitivity could be comparable with chemical detectors. Such a system has several advantages: relatively low price, small size and weight, and detection possibility of other gases.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 363-367
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Possibility of Developing Matched Acousto-Optical Light Filtering Method for Incoherent Telecommunications and Earth Remote Investigations
    Autorzy:
    Proklov, V.
    Byshevski-Konopko, O.
    Lugovskoi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1377946.pdf
    Data publikacji:
    2015-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.Jq
    43.58.Kr
    42.30.-d
    42.79.Sz
    42.79.Qx
    84.40.Ua
    Opis:
    This is a systematic study of the possibility of creating multi-frequency matched acousto-optic light filters and constructing on new basic principles of the non-coherent optical transmission systems with optical code division multiple accesses and hyperspectral sensors for remote sensing using pre-detector optimal filtering of optical information.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 1; 29-35
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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