An Investigation of Attenuation and Dispersion in Optical Fiber
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Date
2013-06
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Addis Ababa University
Abstract
Study of non-linearity in optical ber material has attracted tremendous attention
over last two decades. Despite many experimental and theoretical e orts to nd
the origin of non-linearity and to quantify the loss due to non-linearity still a debable
issue. The aim of this project work is to nd a mechanism and to quantify
non-linearity that causes attenuation and dispersion in optical ber. We speci -
cally calculated solution to non-linear envelope equation (non-linear Schr odinger
equation ) from Maxwell is theory choosing appropriate envelope function. Our
calculation are in agreement with other researchers as far as loss and non-linearity
are con cerned. We found the Soliton solution which is very interesting result that
can be further looked at in detail to observe the non-linear e ect in ber material.
It is found that the non linearity balances dispersion and a stable pulse is formed
which does not alter its shape during propagation. This simple calculation gives
understanding for the mechanism of the origin of non-linearity. Moreover, it helps
to control non-linearity by tuning some of the componsion of ber material
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Keywords
Dispersion in Optical Fiber