The Analysis of Shift Alternative Repeated Unequally Spaced Channels Allocation for DWDM System
Keywords:
Dense wavelength division multiplexing, four wave mixing, nonlinear, shift alternative repeated unequally spaced, channel allocationAbstract
This paper proposes the new method to improve
the conventional techniques in the channel allocations in order
to reduce transmission loss in the case that a large number of
channels are in close proximity to each other. This phenomenon,
called Four-Wave Mixing (FWM), can be observed in the case
of Dense Wavelength Division Multiplexing (DWDM) which is
the cause of transmission loss due to the nonlinear
characteristic of the fiber. The channel allocations that can be
utilized to resolve this problem are Equally Spaced (ES),
Equally Repeated Unequally Spaced (ERUS) and Base-unit
Repeated Unequally Spaced (BRUS). This paper presents the
new technique of the channel allocation called ―Shift alternative
repeated unequally spaced (SARUS)‖ to avoid the Four-Wave
Mixing. From the simulation results, the new proposed
technique can decrease an average FWM efficiency from -28.19dBm to -32.07dBm and reduce BER from -19.7dBm to -25.1dBm. Furthermore, the number of channels has been
increased to 43 channels in DWDM transmission system
(C–band). These results indicate that SARUS has a lower FWM
efficiency than BRUS and other above mentioned techniques.
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