The channels contributed in creating new pulse during the four-wave
mixing (FWM) process are a subject of two features: the first is the fact that
all channels are not working with probability
%100 , but with
p
probability. Second, the bits transmitted are not all "1". Therefore, the
equation of power generated using these features should be corrected. On
the other hand, the use of equally spaced channels wavelength divisionmultiplexing
(ESC
WDM)
system
cause
an
increase
in
the
number
of
new
components
generated that interfere with the active channels and increase the bit error rate. In order to reduce these interferences, we have provided
an unequally spaced channels wavelength division-multiplexing (USC WDM) system composed of several sets. Each set consists of only four
channels, which locations have been selected to cause no interferences between them. Neighboring sets are separated by a frequency spacing which
should be large enough to reduce the interferences between the sets, andsmall enough to increase the total number of channels of the system.
Effect of Four Wave Mixing in WDM Systems for Higher number of Channels