Date of Award


Document Type


Degree Name

Doctor of Philosophy (PhD)


Electrical Engineering and Computer Science

First Advisor

Syed Murshid

Second Advisor

Gnana Bhaskar Tenali

Third Advisor

Brian A. Lail

Fourth Advisor

Chul-Ho Lee


This dissertation delves into exploring and advancing spatial domain / space division multiplexing (SDM) technologies within single-core optical fibers, a frontier in optical fiber communications poised to meet the burgeoning global demand for data transmission. At the heart of this research is the pursuit to significantly enhance the capacity and efficiency of optical fiber communication systems without necessitating additional fiber infrastructure. This work unveils a new paradigm in optical fiber communications characterized by a pioneering 4-channel SDM system through a meticulous process encompassing theoretical modeling, computational simulations, design innovations, and rigorous experimental validations. Theoretical contributions include the development of refined mathematical models such as the ray theory model and the application of the Bessel-Gaussian (BG) beam model external to the confines of the optical fiber, which have been instrumental in enhancing the understanding of SDM output behavior, thereby bridging the gap between theoretical concepts and practical implementations. Computational simulations facilitated system design optimization, guiding the development of innovative multiplexer and de-multiplexer components tailored to integrate multiple data channels within a single fiber efficiently. Experimental validations underscore the feasibility and efficiency of the proposed 4-channel SDM system, demonstrating its potential to increase data transmission capacity substantially. This research journey, while challenging, has resulted in significant advancements in the field of optical fiber communications, contributing both to the academic body of knowledge and the technological capabilities of optical fiber systems. In conclusion, this dissertation not only highlights the critical role of SDM in advancing optical fiber communication technologies but also sets the stage for future explorations aimed at overcoming the limitations of current fiber optic networks, paving the way for the next generation of high-capacity, efficient, and scalable communication systems.


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