Abstract
Recent studies have revealed an important type of optical pulse (similaritons) with parabolic profiles and linear frequency chirps that propagate in optical fiber amplifiers with constant and distributed gain [1]. In recent papers the effect of third-order fiber dispersion (TOD) on similariton pulse propagation has been studied in fibre amplifiers, and in mode-locked lasers [2]. In fact, the impact of TOD on parabolic pulses propagation is to generate optical shock-type instabilities as shown in Fig.1 (a) [3, 4].
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