Date of Award


Degree Name

Doctor of Philosophy


Electrical and Computer Engineering

First Advisor

Sayeh, Mohammad


This dissertation concentrates on the investigation and design a new model and implementing of Optical Binary Delta-Sigma Modulator (Proteretic Switch) to improve the bandwidth limitation toward THz modulation frequency in the optical domain. The presented design of Proteretic Optical Binary Delta-Sigma Modulator contains two essential components, the leaky integrator and inverted bi-stable device with positive feedback which were designed and implemented according to the switching performance, to reach higher frequency by using ring laser technology, and semiconductor optical amplifier (SOA) based on cross-gain or phase gain modulation. All optical devices have been tested through VPI photonics circuit maker application, which could be fabricated on a single integrated photonic chip. The new bi-stable switch “Proteresis” model using active elements such as semiconductor optical amplifier (SOA) and passive elements such as optical bandpass filter, optical isolator, and coupler. The bi-stable switch “proteretic” properties model and parameters are studied, and simulation tested to confirm its performance. The contribution of this dissertation can help the communication technology that needs high-speed signal processing, high resolution, less noise, and the design showed the capability of achieving this objective.

Available for download on Thursday, October 22, 2020




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