Characterization of non-idealities in optical Nyquist pulses for THz signal sampling metrology

Abstract

Optical sinc-shaped Nyquist pulses can be utilized for high-speed communication with minimal error as it enables orthogonality and rectangular shape in the frequency domain, etc. Nevertheless, for metrological evaluations, the performance of the system is hampered by the presence of non-idealities. In this work, we simulate and examine the impact of two prime non-idealities: the sideband suppression ratio (SSR) and the roll-off factor of sinc-shaped reconfigurable Nyquist pulse sequences based on 3-line optical phase-locked combs at a frequency spacing of 200 GHz. Furthermore, we estimate the root-mean-square (r.m.s.) error for the respective non-idealities.