propagation of electromagnetic waves in bragg waveguide having unconventional materials

Abstract

In the present age of communication, people continuously have desired new techniques and technologies for communicating their ideas, needs, and desires to others. Thus, many forms of increasingly complex communication systems have appeared over the years. The basic motivations behind each new one were to improve the transmission fidelity so that fewer errors occur in the received message, to increase the transmission capacity of a communication link so that more information could be send, or to increase the transmission distance between relay stations so that messages can be sent farther without the need to restore the signal fidelity periodically along its path. newlineIn today s age of teraflops, the need for fast, accurate and reliable communication systems with minimum loss feature provided by optical fibers (waveguides), currently concepts for Bragg waveguide are vigorously investigated. This thesis introduces Bragg waveguide having unconventional materials (plasma). It is well known that in the conventional optical fibers, light is confined and guided by total internal reflection, which requires that the core has a slightly higher refractive index than that of cladding. Total internal reflection is perfect in that it causes no loss other than the intrinsic absorption and scattering losses of the materials themselves. Such losses can be reduced much in the case of a Bragg waveguide where guidance of light takes place via Bragg reflection and central core has lower refractive index (air) than that of surrounding cladding regions. In this way Bragg waveguides and fibers are much superior to conventional optical waveguides and fibers in many ways. newlineHere, in the present thesis the author has chosen Unconventional optical Bragg waveguides having plasma in the central core region. newlineThe motivation for proposing this type of Unconventional Bragg waveguides stems from the work on standard Bragg fiber and unconventional optical Bragg waveguide investigated in different review papers by using a simple analytical method