Abstract:
The transmission distance of any WDM fiber-optic communication system is
eventually limited by fiber losses and it was introduced from fiber attenuation,
connectors, splices, dispersion, interference and bending causes the power
reduction in optical fiber communication. This loss limitation was mostly
overcome using tunable optical filters, devices in which the desired channel
is to be selected at the receiver with negligible crosstalk and small insertion
loss.
In this thesis different kinds of tunable optical filters such as: Fabry-Perot,
Machzehnder and Acuosto-Optic filters are implemented to compensate losses.
From the obtained results, it will be shown that a WDM optical system with
a Machzehnder filter gets the best performance to compensate losses than
Fabry-Perot and acuosto-optic filters in terms of Q-factor, BER, eye height
and threshold when a fiber length, attenuation coefficient and input power
design parameters are changed. Also fabry-perot filter produced better results
at all cases than acuosto-optic filter which has a bad performance than others.
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