Figure 1: Design of 4 channel DWDM Network in NRZ format with higher extinction ratio There are two simulation conducted for two different values of fiber length corresponding to high and low extinction ratio in the given optical fiber topology (figure 1). Figure 4: Eye Diagram of eye height 0.00498795 for total length 250 km SMF Sy OEE IIS! INAS We get the standard graphical relation as shown in the figure 4, by increasing the extinction ratio and asymmetrical distribution of input powers in this DWDM network, bit error rate decreases with higher quality factor which is shown by the maximal eye opening in figure 4. Table-2 BER of simulations at 193.075 THz Now it is crystal clear from the obtained data of the Table 2 that establishing the relation between dispersions and the corresponding quality factors. Further as per the same parameters of table 1 simulation executed for the different fiber length with the same extinction ratio as shown in the table 3,4& 5. Table-4 Output at particular value of fiber length and High Extinction Ratio Table-3 Variation of Quality factor with ER and Fiber length Again, all the parameters are kept constant at the Low Extinction Ratio with the different fiber length Table-5 Output at particular value of fiber length and Low Extinction Ratio
