The Impact of Dispersion Fluctuation on the Optimization of Parametric Wavelength Exchange

The optimized parameters of wavelength exchange vary from fiber to fiber due to zero-dispersion wavelength fluctuation. This problem can be solved by reducing wavelength separation between signal and idler at the expense of reduced tunability. Parametric wavelength exchange (PWE) relies on four-wave mixing (FWM) phenomenon, where a signal wavelength at signal and an idler wavelength at idler exchange their power periodically while two strong pumps at p1 and p2 are co-propagating in highly-nonlinear dispersion-shifted fibers (HNL-DSF) [1]. Four waves are arranged symmetrically with respect to the zero-dispersion wavelength (ZDW) 0 of the fiber, such that the angular frequencies i, (i = 1 – 4) satisfy 1