Abstract
In this paper, performance of an ultra-high capacity fiber optic dense wavelength division multiplexing (DWDM) system is improved using dual polarization quadrature phase shift keying (DP-QPSK) modulation and symmetrical dispersion compensation techniques. It is a 16 channel DWDM system. The proposed system is analyzed for different advanced modulation schemes such as modified duo-binary return to zero (MDRZ), quadrature phase shift keying (QPSK), dual polarization QPSK (DP-QPSK) technique and simulated with 400 Gbps/channel data rate. It is expected that the projected ultrahigh capacity system is more technically feasible, because it uses advanced modulation format and best dispersion compensation technique. In the modern communication world, the proposed system will be very much helpful for transmitting high-speed digital data with very high spectral efficiency.
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