2020-01-31T14:37:35Z (GMT) by
The left panels represent the pulses propagating along two concatenated fibers for three different initial delays. The right panels show the accumulated FWM spectrum. The pulse parameters are the same as in the experiments, and the fiber parameters are those of Figure 6. The first (130 ps) and third (390 ps) delays correspond to cases where the pulses overlap on the first and second fiber, respectively. In the case of the second delay (263. 5 ps) the peak of the pulses cross at the transition between the two fibers, generating a spectrum with two peaks of equal heights.