Research Projects

· Optical Signal Processing, Femtosecond Pulse Shaping, and Optical Communications
	Spectral Line-by-Line Pulse Shaping Fully Dispersion Compensated ~500 fs Pulse Transmission Over 50 km Single Mode Fiber Hyperfine Wavelength Division Multiplexing (HWDM) based on the Virtually-Imaged Phased-Array (VIPA) Spectrally Phase Coded OCDMA System Testbed Photonic Synthesis of Ultrabroadband Radio-Frequency Waveforms Monitoring & Compensation of Polarization-Mode Dispersion Ultrafast Optical Pulse Sequence Generation Using Integrated Optics Programmable Optical Pulse Burst Manipulation using a Virtually Imaged Phased Array (VIPA) based Fourier Transform Pulse Shaper Direct Space-To-Time Pulse Shaping using the Virtually-Imaged Phased-Array (VIPA) and its Application in Microwave Arbitrary Waveform Generation High Repetition Rate Generation of Arbitrary Lightwave and Millimeter-wave Signals 20-fs Pulse Shaping with a 512-element Phase-only Liquid Crystal Modulator Ultrashort Pulse Spectral Correlator Using Second Harmonic Generation Direct Space-to-Time Pulse Shaper for Femtosecond Pulses Femtosecond Optical Encoding for High-Speed Fiber Communications: Technology and Systems Studies
· Ultrafast Nonlinear Optics
	Ultrasensitive Chromatic Dispersion Monitoring and Frequency-resolved Optical Gating (FROG) Measurement for Ultrashort Pulses by Chirped Quasi-phase Matched (QPM) Lithium Niobate Waveguides at 1.5 mm Ultrasensitive Intensity Autocorrelation Measurements of Ultrashort Optical Pulses with Aperiodically Poled Lithium Niobate (A-PPLN) Waveguides at 1.55mm A Femtosecond Waveform Transfer Technique by Type II Second Harmonic Generation (SHG) Generalized Theory of Optical Second Harmonic Generation Efficiency Femtosecond Second Harmonic Generation in Periodically Poled Lithium Niobate Waveguides Frequency Doubling of Femtosecond Pulses in Thick Nonlinear Crystals
· Novel Materials & Devices
	§ Broadened far-infrared absorption spectra of hydrated and dehydrated myoglobin studied by terahertz time-domain spectroscopy § Coherent control of Bloch oscillations in superlattices by means of optical pulse shaping § Pulse Processing Using Nonlinear Guided Wave Optoelectronic Devices § Holographic Processing of High-Speed Optical Signals using Photorefractive Quantum Wells