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Browsing by Author "Liang, Wei-Hong"

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    Pulse Shaper Assisted Characterization of Single-cycle Optical Pulses
    (2009)
    Hsieh, Zhi-Ming
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    Lai, Chien-Jen
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    Liang, Wei-Hong
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    Tang, Tsung-Ta
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    Chen, Wei-Jan
    Shaper-assisted autocorrelation is developed to characterize single-cycle pulses. The correlation signal show significantly improved signal-to-noise ratio and thus accuracy in pulse characterization when compared to cross-correlation obtained by splitting the spectral components of the pulse. (C) 2009 Optical Society of America
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    Spatial Light Modulator for Pulse-Shaping of Single-Cycle Optical Pulses
    (2009)
    Liang, Wei-Hong
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    Hsieh, Zhi-Ming
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    Tang, Tsung-Ta
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    Kung, A. H.
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    Pan, Ci-Ling
    A liquid crystal spatial light modulator that operates from the ultraviolet (350nm) to the mid-infrared (2400nm) is described The modulator is suitable for shaping the electromagnetic wave form of multioctave optical pulses
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    Synthesis and Measurement of Ultrafast Waveforms from Five Discrete Optical Harmonics
    (2011-03-04)
    Chan, Han-Sung
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    Hsieh, Zhi-Ming
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    Liang, Wei-Hong
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    Kung, A. H.
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    Lee, Chao-Kuei
    Achieving the control of light fields in a manner similar in sophistication to the control of electromagnetic fields in the microwave and radiofrequency regimes has been a major challenge in optical physics research. We manipulated the phase and amplitude of five discrete harmonics spanning the blue to mid-infrared frequencies to produce instantaneous optical fields in the shape of square, sawtooth, and subcycle sine and cosine pulses at a repetition rate of 125 terahertz. Furthermore, we developed an all-optical shaper-assisted linear cross-correlation technique to retrieve these fields and thereby verified their shapes and confirmed the critical role of carrier-envelope phase in Fourier synthesis of optical waveforms.
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    Synthesis of Attosecond Waveforms Using Raman-generated Frequency Combs
    (2010)
    Chan, Han-Sung
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    Hsieh, Zhi-Ming
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    Liang, Wei-Hong
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    Kung, A. H.
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    Lee, Chao-Kuei
    Attosecond optical waveforms of arbitrary shape are synthesized and verified using a Raman-generated comb of frequencies that have a controlled and stable carrier-envelope phase. (C)2010 Optical Society of America