“…Many technics were previously investigated in order to reduce or to quite cancel these effects such as dispersion management technic, an experimental grouping wavelength method, the use of weak random dispersion in second term of dispersion and recently in frequency-division multiplexing systems [5]. However, the FWM has been discovered to be also useful, for example when looking for the values of the third-order nonlinearindex assuming a FWM-Based technic [5]. In addition, the FWM has also been important when looking for the ratio of the third over fourth order dispersion coefficients, making parametric oscillators, ultrafast signal processing, FWM-induced quadrature squeezing and other applications [5].…”