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Author: search.filters.author.Pornsuwancharoen, N.Subject: search.filters.subject.Continuous variable

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    Continuous variable quantum key distribution via a simultaneous optical-wireless up-down-link system
    (2010-09-01)
    Suchat, S.
    ;
    Pornsuwancharoen, N.
    ;
    Yupapin, P. P.
    We propose a remarkably simple system of a continuous variable quantum key distribution using chaotic signals generated by a soliton pulse within a nonlinear micro-ring resonator system. By using the appropriate soliton input power and micro-ring parameters, continuous signals are generated spreading over the spectrum. Polarized photons are formed incorporating the polarization control unit into the micro-ring system, which allows different time slot entangled photons to be randomly formed. Two different frequency bands for up-down-link converters can be selected (filtered) and performed, which is available for the simultaneous up-down-link application in the telephone networks. Results obtained have shown that the application of such a system for continuous variable quantum cryptography via optical-wireless up-down-link converters within a single system is plausible. © 2009 Elsevier GmbH. All rights reserved.
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    Quantum key distribution using the localized soliton pulses via a wavelength router in the optical network
    (2010-01-01)
    Pornsuwancharoen, N.
    ;
    Dunmeekaew, U.
    ;
    Yupapin, P. P.
    We propose a new system of a continuous variable quantum key distribution via a wavelength router in the optical networks. A large bandwidth signal is generated by a soliton pulse propagating within the micro ring resonator, which is allowed to form the continuous wavelength with large tunable channel capacity. There are two forms of localized soliton pulses proposed. Firstly, the required information is transmitted via the localized temporal soliton pulse. Secondly, the continuous variable quantum key distribution is formed by using the localized spatial soliton pulse via a quantum router and networks, which is formed by using and optical add/drop multiplexer incorporating in the network. The localized soliton pulses are available for add/drop signals to/from the optical network, where the high security and capacity information can be performed. © 2009 Elsevier GmbH. All rights reserved.