Theses and Dissertations from UMD

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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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Author: search.filters.author.Apiratikul, PaveenSubject: search.filters.subject.Nonlinear optics

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    SEMICONDUCTOR WAVEGUIDES FOR NONLINEAR OPTICAL SIGNAL PROCESSING
    (2009) Apiratikul, Paveen; Murphy, Thomas E.; Electrical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    This thesis investigates nonlinear effects in semiconductor waveguides for optical signal processing. Two semiconductor waveguides are studied : nanoporous silicon waveguide and GaAs/AlGaAs waveguide. First, nonlinear optical properties of nanoporous silicon waveguides including two-photon absorption, self-phase modulation and free-carrier effects are characterized and compared with similar measurements conducted on conventional silicon-on-insulator waveguides. Then, we experimentally demonstrate 10-Gb/s wavelength conversion using cross-amplitude modulation, cross-phase modulation and four-wave-mixing in GaAs/AlGaAs waveguides. Finally, we propose an ultrafast optical sampling system based on non-degenerate two-photon absorption in a GaAs photodiode. Using this technique, we successfully demonstrate a background-suppressed measurement of quasi 4-Tb/s eye diagrams.