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Author: search.filters.author.Hwang, TMSubject: search.filters.subject.self-pulsating laser diodes

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Now showing 1 - 4 of 4
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    Optical chaotic AM demodulation by asymptotic synchronization
    (2000-02-01)
    Juang, C
    ;
    Hwang, TM
    ;
    Juang, J
    ;
    Lin, WW
    ;
    應用數學系
    Synchronization between two identical chaotic systems (drive and response) with different initial conditions can be achieved provided that the conditional Lyapunov exponents are all negative. Adding an AM signal to the drive system, the two systems become asymptotically synchronized. The AM signal can be recovered by utilizing the property of the asymptotic synchronization. Chaotic AM noise is present as a direct result of the chaotic AM demodulation. Signal-to-chaotic-AM-noise ratio is calculated as a function of the signal amplitude.
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    Item type:Item,
    A synchronization scheme using self-pulsating laser diodes in optical chaotic communication
    (2000-03-01)
    Juang, C
    ;
    Hwang, TM
    ;
    Juang, J
    ;
    Lin, WW
    ;
    應用數學系
    A synchronization scheme using self-pulsating laser diodes in optical chaotic communication is proposed. Optical chaotic light can be obtained by injecting a sinusoidal electronic signal into a self-pulsating laser diode. To synchronize between two identical chaotic systems with different initial conditions, a drive and response system model is constructed according to Pecora and Carroll's theory. Synchronization can be achieved for optical simplex and duplex transmissions provided that the conditional Lyapunov exponents for the drive and response systems are all negative. This approach offers a key step toward realizing optical chaotic modulation and demodulation.
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    Item type:Item,
    FM detection from an optical chaotic carrier
    (2001-07-01)
    Huang, ST
    ;
    Hwang, TM
    ;
    Juang, C
    ;
    Juang, J
    ;
    Lin, WW
    To synchronize two identical chaotic systems with different initial conditions, a drive and response system model is constructed according to Pecora and Carroll's theory. The drive and response systems become asymptotically synchronized if an FM signal is added to the drive system. The FM signal can be detected when the drive and response systems are strongly coupled.
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    Item type:Item,
    Subcarrier multiplexing by chaotic multitone modulation
    (2003-10-01)
    Juang, C
    ;
    Huang, ST
    ;
    Liu, CY
    ;
    Wang, WC
    ;
    Hwang, TM
    Subcarrier multiplexing by chaotic multitone modulation is investigated. Optical chaotic light can be achieved by injecting multiple subcarriers into a self-pulsating laser diode. Synchronization between two identical chaotic systems (drive and response) can be implemented provided that the conditional Lyapunov exponents are all negative. By adding amplitude modulation (AM) signals to each subcarrier, the two systems become asymptotically synchronized. The AM signals in each subcarrier can be recovered by the introduction of a filtering process where the Lyapunov exponent of the synchronized error function matches the cutoff frequency of a first order low pass filter.