Pulse Train Generation Dependence on Initial Pulses’ Chirp in THz Frequency Range

We demonstrate the dependence of the substructure number in the pulse train and the corresponding frequency comb formed by the interference of two phase-modulated THz pulses on the time delay between pulses for linear and nonlinear chirp cases. The limiting time delay between pulses, at which the correlation of the signal temporal and frequency domains preserving, is shown. The results obtained are important for assessing the capabilities of communication networks based on pulsed THz radiation.