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Browsing by Author "Shih Po Tsung"

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    Item type:Item,
    Adjustable optical signal delay module and method thereof
    (2011-11-15)
    Chen Jye hong
    ;
    Kao Wei-Che
    ;
    Peng Peng-Chun
    ;
    Lin Chun-Ting
    ;
    Wu Fang Ming
    An adjustable optical signal delay module which adjusts power of an amplified spontaneous emission generated by a semiconductor optical amplifier and feeds the adjusted amplified spontaneous emission back to the semiconductor optical amplifier in a direction opposite to an optical signal being amplified by the semiconductor optical amplifier is provided. The feedback of the adjusted amplified spontaneous emission varies a group refractive index of the semiconductor optical amplifier and delays the transmission of an optical signal through the semiconductor optical amplifier. By that arrangement, the adjustable optical delay module obviates the need for the pump laser conventionally required by a coherent population oscillation mechanism. The feedback optical loop includes a variable optical attenuator, an optical filter, and optical circulators. A user can control the delay timing of optical signals via adjusting optical power in the feedback optical loop.
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    Item type:Item,
    Modulation device for generating optical signal with quadruple frequency and method thereof
    (2011-11-15)
    Chen Jye Hong
    ;
    Lin Chun-Ting
    ;
    Shih Po Tsung
    ;
    Peng Peng-Chun
    ;
    Dai Sheng Peng
    The present invention discloses a modulation device for generating an optical signal with quadruple frequency and the modulation method thereof. The modulation device in the present invention utilizes a commercial integrated modulator, a RF signal generator and a phase shifter to generate an optical signal with quadruple frequency. When the RF signal generator generates a first modulation signal, and the phase shifter shifts the first modulation signal by 90 degrees to generate a second modulation signal, the integrated modulator is biased to transmit the optical signal in maximum value and to modulate the first and second modulation signal so as to generate a output optical signal with quadruple frequency.
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    Item type:Item,
    Optical modulation device
    (2012-10-30)
    Chen Jye hong
    ;
    Lin Chun-Ting
    ;
    Jiang Wen-Jr
    ;
    Peng Peng-Chun
    ;
    Shih Po Tsung
    The present invention discloses an optical modulation device, which comprises an electric signal generator generating an electric signal carrying a data signal; a first sinusoidal signal generator generating a first sinusoidal signal; an optical signal generator generating an input source optical signal; and an optoelectronic modulator (Mach-Zehnder modulator) receiving the input source optical signal, the electric signal and the first sinusoidal signal, biased to modify a transmission performance of the input source optical signal, modulating the input source optical signal with the electric signal and the first sinusoidal signal, and then sending out an output source optical signal carrying the electric signal and the first sinusoidal signal. The present invention realizes frequency multiplication, enables an optical signal to carry vector signals, and promotes the efficiency of broadband systems.