Parabolic pulse generation with active or passive dispersion decreasing optical fibers

Abstract

We experimentally demonstrate the possibility to generate parabolic pulses via a single dispersion decreasing optical fiber with normal dispersion. We numerically and experimentally investigate the influence of the dispersion profile, and we show that a hybrid configuration combining dispersion decrease and gain has several benefits on the parabolic generated pulses.

Active Mamyshev regenerator

“…This would provide also very promising perspectives for optical regenerators out of the range of the conventional band of telecommunication when no efficient EDFA are available 42) . Let us finally note that the presence of a physical gain is not a mandatory condition to observe the parabolic dynamics and that similar behavior can be also experienced in a passive normally dispersive fiber where a longitudinal decrease of the dispersion value may mimic the effect of distributed Raman gain 43,44) . …”

Study of parabolic self-similar optical pulse generation in single mode fibers using variational approximation for the LP mode

“…T is the time in co-propagating frame and z is the distance of propagation. It is to be mentioned here that the gain g as given in equation (11) is provided through the process of Raman amplification [29] as adopted in previous works [24,36]. After suitable steps of coordinate transformation, the NLSE is reduced to the following form [35]…”

“…In the recent years, interest has grown in the study of the generation of selfsimilar parabolic pulses [22][23][24] in the fibers due to their potential applications in supercontinuum generation [25], femtosecond lasers [26], pulse reshaping [27] and many more. An optical pulse propagating through a normally dispersive fiber experiences the undesirable effects of optical wave breaking which seriously degrades the performance of the system.…”

Generation of parabolic pulses and applications for optical telecommunications

“…Several specific techniques have been recently experimentally demonstrated. Based on the observation that a longitudinal decrease of the normal dispersion is formally equivalent to optical gain, it has for example been proposed to use continuously tapered dispersion decreasing [8,9] or comb-like fibers [10]. For a given set of input parameters, it has been shown that only two carefully chosen normally dispersive optical fiber segments were required [11][12][13] (Fig.…”