In this study, six different types of optical fibers (SMF, HNLF, HNL-DFF, NZDSF, LEAF (step core) and LEAF (ring core)) can be used for different number of channels (16, 32, 64, and 80) at different bit rates to calculate the quality factor for these types of optical fibers at the optimum length for max BER × 10 −9 and min BER × 10 −12 . By using the software Optisystem version 13, the work has been demonstrated and compared with previous study to find the best one under the same operating conditions.