Abstract: In this paper, the signal propagation along the fiber, in either absence or presence of the crosstalk interference appearing at different places along the fiber, for both dispersive regime cases, is considered. The optical signal that appears at transmitter output has the envelope in super-Gaussian form.
The crossltalk appears at the transmitter output or along the fiber. The pulse shape at the receiver input is determined using Schr\"odinger equation. The noise sources are the photodetector and resistance in the receiver. The bit error probability of intensity modulation and direct detection (IM-DD) system in the presence of the crosstalk, quantum and thermal noise is determined.
Keywords: Nonlinear Schroedinger equation, IM-DD communication systems, pulse propagation, interferometric noise, bit error probability.