Design Proposal: Mach-Zehnder Interferometer

AbstractThis report describes the design, fabrication and test of a Mach-Zehnder interferometer using silicon-on-insulator fabrication. Simulation results of the initial design are presented. These will be compared against the future experimentally measured results.

Introduction

The Mach-Zehnder Interferometer (MZI) is a basic building block for numerous useful silicon photonic constructs such as modulators, switches and filters.  This paper will detail a design proposal for multiple MZI devices built with silicon-on-insulator (SOI) technology with strip waveguides.

This proposal will consist of 3 further sections, a brief review of the MZI theory.  Model and Simulation results that describe the proposed design.  Finally, a conclusion that presents the next steps for layout, fabrication and test.

Theory

A MZI is constructed with a Y-branch splitter, two waveguides and a Y-branch combiner.  The basic form shown in the figure below is a balanced configuration.  This balanced configuration yields constructive combination at the output Eo.