Date of Award

Fall 2004

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Electrical & Computer Engineering

Program/Concentration

Electrical Engineering

Committee Director

Sacharia Albin

Committee Member

Hani Elsayed-Ali

Committee Member

Linda L. Vahala

Call Number for Print

Special Collections LD4331.E55 I45 2004

Abstract

Photonic crystal fibers (PCFs) allow guiding light in low-index core. These fibers exhibit properties such as single-mode operation in broad wavelength region. The mode shape and group velocity dispersion can be controlled by designing the microstructures of the cladding. In order to study these properties, a fast, efficient, and highly accurate numerical modeling method is required.

A full-vectorial finite-difference frequency-domain (FDFD) method is implemented. The modal properties of conventional step index fiber and index-guiding PCF are analyzed using this modeling technique. Compared to plane wave expansion and biorthogonal basis methods, FDFD is found to be simple, reliable, and efficient. PCFs with radially dependent indices such as Bragg fibers are modeled using FDFD in one-dimensional cylindrical coordinate system.

Using FDFD modeling technique, an index-guiding PCF is designed for single mode operation over the wavelength region of 0.29itm to 2.3)tm. Further, it is shown that by engineering the cladding structure, finite number of mode operation and specialized dispersion properties can be achieved. In addition, an all-solid silica Bragg fiber with zero-dispersion at wavelength 1.55@m is designed. Finally, the applications of these fibers are discussed.

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DOI

10.25777/fsyr-gq36

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