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Author: search.filters.author.Yupapin, Preecha P.Subject: search.filters.subject.Communication security

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    Novel optical cryptography using PANDA ring resonator for highly secured communication
    (2011-07-01)
    Putthacharoen, Rattipong
    ;
    Juleang, Pakorn
    ;
    Mitatha, Somsak
    ;
    Yupapin, Preecha P.
    We propose a novel method of an optical cryptography using the dark-bright soliton conversion control in a modified adddrop optical filter. By using the control arrangement, the obtained outputs of the dynamic states of dark-bright soliton can be used to form the key suppression for communication security application, in which the key recovery can be obtained by controlling the adddrop filter outputs. The optical cryptography consists of an adddrop filter which is used to generate the encryption and decryption keys from the optical keys (LIP signals). A Mach-Zehnder interferometer is used for multiplexing and de-multiplexing operations. Simulation results obtained shows, that the proposed system can be used to form a high security communication system. © 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
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    Fast and slow light generation using chaotic signals in nonlinear microring resonators for communication security
    (2009-01-29)
    Pornsuwancharoen, Nithiroth
    ;
    Chalyasoonthorn, Sawatsakorn
    ;
    Yupapin, Preecha P.
    We propose a new system of signal security using nonlinear micro ring resonators for optical communication system. When a soliton pulse Is input into the system, the chaotic signal Is generated and multiplexed into the optical link. The chaotic waveform can be canceled using an add/drop device connected into the transmission link. Using the appropriate ring parameters, the original signal can be retrieved. An other application results from the fact that the fast and slow light behaviors can be presented, and can be seen using the add/drop multiplexers. In some cases, we can generate signal to obtain the two identical "signal" and "ghost" signals, which are observed in a different time frame. In this application, communication security can be performed when the required information is multiplexed and performs the link using the chaotic signal, fast and slow light, and signal and ghost signals, where the original signal can be retrieved by the known clients. © 2009 Society of Photo-Optical Instrumentation Engineers.