Abstract :
Dense wavelength division multiplexing (DWDM) is one of the most appropriated
techniques based on sending several information using wavelength channels in a single
optical transmission. The principle of DWDM system is reduced the channel spacing and
enhance bandwidth capacity for long haul optical communications system but it is not robust
with an interference effect called dispersion, especially in high bitrate communication which
is caused by pulses broadending that reduce the system performance. Dispersion
compensating fiber (DCF) is one solution to reduce dispersion because it has negative
dispersion value to compensate the positive dispersion in the system. The purpose of this
research is analyze the performance of DCF schemes in DWDM optical network based on
optical launch power in optical modulation. In this research compared three different
schemes of dispersion compensation (pre compensation, post compensation, and symmetrical
compensation) using DCF to compensate dispersion in DWDM systems. The modeling system
is used 40 Gbps bitrate DWDM optical network and 16 channels with channel spacing 200
GHz for fiber length 300 km and used erbium doped fiber amplifier (EDFA) to overcome the
attenuation. The research scenario is using input power variation for 0, 2, 4, 6, 8, and 10
dBm. The result obtain that using pre compensation and post compensation schemes using 0
meet the standard but for symmetrical compensation schemes is
reached the standard -12 . The result concluded that using
symmetrical compensation schemes to compensate dispersion gives better performance.
Keywords: DWDM, DCF, BER, Q Factor