All-optical control of unipolar pulse generation in a resonant medium with nonlinear field coupling

TL;DR

This paper presents a method for generating controllable unipolar half-cycle pulses using a resonant medium with nonlinear coupling, driven by tailored pump pulse sequences, enabling precise pulse shaping.

Contribution

It introduces a general framework for producing unipolar pulses of arbitrary shape through nonlinear optical response control in a resonant medium.

Findings

Unipolar pulses can be generated with arbitrary shape by adjusting pump pulse timing.

Different geometrical configurations affect the medium's response and pulse shaping.

The approach is versatile for controlling pulse form in nonlinear optical systems.

Abstract

We study optical response of a resonant medium possessing nonlinear coupling to external field driven by a few-cycle pump pulse sequence. We demonstrate the possibility to directly produce unipolar half-cycle pulses from the medium possessing an arbitrary nonlinearity, by choosing the proper pulse-to-pulse distance of the pump pulses in the sequence. We examine the various ways of the shaping of the medium response using different geometrical configurations of nonlinear oscillators and different wavefront shapes for the excitation pulse sequence. Our approach defines a general framework to produce unipolar pulses of controllable form.