Table 2: Comparison of BER at different fiber length for different dispersion compensation techniques.

LENGTH (Km) DCF PRE FBG PRE DCF POST FBG POST DCF SYMM FBG SYMM
5 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00
10 5.5539300E-132 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00
15 1.7451700E-40 0.0000000E+00 0.0000000E+00 0.0000000E+00 1.3497400E-34 0.0000000E+00
20 7.1810300E-92 3.6689200E-142 2.2567100E-98 4.3174600E-233 7.2709200E-16 0.0000000E+00
25 1.7999800E-65 8.1989800E-89 4.1848300E-23 9.0540600E-134 3.0516800E-11 0.0000000E+00
30 2.5051100E-91 1.9351600E-18 8.5952600E-23 7.2240800E-130 9.4386000E-10 3.4093100E-244