Dispersion Compensation in a 64-Channel Dense Wavelength Division Multiplexing Network

In optical fiber communication, information is relayed from the transmitter and received at the receiver where optical signals are converted into electrical signals. In recent years the demand for bandwidth has increased enormously. To meet the demand of increasing bandwidth with higher data rates led to dense wavelength division multiplexing (DWDM), an advanced multiplexing technique in which multiple signals can be transmitted simultaneously for various wavelengths in the same channel. Pulse broadening due to dispersion results in signal quality deterioration. Dispersion should be minimized during long haul communication. This paper reviews a 64 channel optical communication DWDM network which is simulated and analyzed for transmission lengths up to 300km, and for Signal Powers from -2dBm to 6dBm using various compensating schemes, broadly using Dispersion Compensating Fibers and Fiber Bragg Grating types of compensation schemes. Modified Duobinary Return to Zero (MDRZ) encoding format is used in the transmitter. The software used for simulation purposes is Optisystem 16 and other software used are OriginPro8 and Visio. The simulated results of the maximum Q-factor and Minimum Bit Error Rate (BER) value indicate that a combination of symmetric compensating fibers and Fiber Bragg Grating (FBG) result in better performance at larger transmission distances when parameters mentioned above and eye diagrams are compared.