Petkie, Douglas Todd
MIT Lincoln Laboratory
This project involved the characterization and modeling of state-of-the-art photodiodes fabricated at MIT Lincoln Laboratory in the Integrated Nanosystems Group. A preliminary literature review correlated photodiode design with the optimization of 3-dB bandwidth, responsivity, and current-handling. The measurement of the responsivity as a function of wavelength revealed unexpected oscillations as a function of device length, caused by a reflective cavity in the photodiode. Applying an anti-reflective coating to the devices successfully eliminated these oscillations. Characterization of current-handling and responsivity demonstrated that the photodiodes could be fabricated to improve overall performance and realize a high-power, high-speed device for microwave photonic applications.
Worcester Polytechnic Institute
Major Qualifying Project
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