Propagation of a peak-truncated Gaussian pulse in an inverted coupled-resonator-induced transparency system

Abstract

Using controllable anomalous dispersion in an inverted coupled-resonator-induced transparency (inverted-CRIT) system, we experimentally explored the propagation of a peak-truncated Gaussian-shaped temporal pulse. A smooth pulse peak related to the Gaussian pulse was regenerated at the output port without any deformation, even when the input pulse lacked the peak. A unique feature of this inverted-CRIT peak is that the peak is not attenuated (or amplified), and thus exhibits an intensity identical to that of the original input pulse before truncation. We discuss pulse propagation in inverted-CRIT in relation to pulse propagation in a normal-CRIT system, i.e., a slow-light system, in which the output pulse lacks a peak even when the incident pulse has one.