Analysis of Optical Waveguides and Multimodenterference Devices Using the Finite-Differencerequency-Domain Method
Date Issued
2009
Date
2009
Author(s)
Pai, Ying-Shuo
Abstract
In this research, the ?nite-di®erence frequency- domain (FDFD) method is adoptedo analyze optical waveguides with di®erent cross-sections and related multi-modenterference (MMI) devices. The perfectly matched layer (PML) is employed as thebsorbing boundary of the computing window in the FDFD solver. Several opticalaveguides including channel waveguides, rib waveguides, optical ?bers, photonicires, and two kinds of low loss fabricated waveguides are analyzed. The conceptnd phenomena of the MMI are introduced, and we utilize the modal propagationnalysis and the FDFD mode solver to analyze and design the MMI. The MMIhenomena for di®erent input positions are also investigated. Finally, we try toesign simple MMI power splitter devices using the structure of a photonic wire and low loss etchless waveguide, respectively, and discuss the imaging length and theoupling e?ciency versus the width of the multi-mode waveguide.
Subjects
multimode interference
finite difference frequency domain
Type
thesis
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