Interaction of a Pair of Parabolic Self-similar Pulses in Nonlinearity Varying Chalcogenide Fibers (NVCFs)

Generation of a self-similar parabolic pulse (PP) in presence of virtually gained normal dispersion tapered chalcogenide fibers is presented in this work. The variations of group velocity dispersion and mainly nonlinearity along the fiber length produce the proposed nonlinearity varying chalcogenide fibers (NVCFs) which can induce sufficient amount of virtual gain leading to obtain desired PPs at smaller optimum length. While studying the interaction among such pair of PPs, it is observed that an oscillating pulse train is created in the overlapping zone. The so generated beat frequency can be tuned in a range of 575– 832 GHz when a lengthwise variation of fiber is considered.