Simulation of a new method to generate gaussian pulses for UWB systems

Abstract EN

We proposed and demonstrated a novel method to generate Ultra-Wideband (UWB) pulse (monocycle and doublet) using an optically reconfigurable photonic microwave delay-line filter and Optical amplifier (OA).

By using the XGM in the OA, a pair of polarity-reversed optical Gaussian pulses is generated at the output of the OA, to which a Gaussian pulse pump and a continuous-wave probe are applied.

The two polarity-reversed optical pulses are then time delayed by two cascaded fiber Bragg gratings to introduce a time delay difference.

A UWB monocycle pulse with a full width at half-maximum of 35 ps was achieved.

The microwave filter can be reconfigured as a three-tap microwave filter with coefficients of (1, -2, 1).

The function of microwave filter is equivalent to an operation of a second-order difference, which can be approximated as a second-order derivative.