Evaluation of the Performance of a HPON Network Using SNR Changes Resulting from an Increase in the Length of Bidirectional Optical Fiber
A hybrid TDM / DWM PON network with 64 users was designed by a bidirectional optical fiber in this paper. Having analyzed the performance of the hybrid network on the basis of signal to noise ratio (SNR), the parameter was calculated for different fiber lengths. All designing procedures were performed by optisystem software and measured values were represented and evaluated. As expected, the result showed that, due to an increase in the length of the fiber, the amount of noise increased and consequently, the signal to noise ratio decreased. However, it was found that the used topology was able to receive information in both upstream and downstream for fibers with a length up to 30 km and parameters of Q factor, the bit error ratio, and the signal to noise ratio are desired and acceptable for fibers of 30 km length.