Generation of unipolar pulses in a circular Raman-active medium excited by few-cycle optical pulses

TL;DR

This paper proposes a theoretical method to generate unipolar rectangular pulses of arbitrary duration using a circular Raman-active medium excited by few-cycle optical pulses, expanding pulse generation techniques.

Contribution

It introduces a novel approach for unipolar pulse generation in a circular Raman medium excited by few-cycle pulses, with potential for long-duration pulse control.

Findings

Unipolar rectangular pulses can be generated with arbitrarily long duration.

The method relies on a circular distribution of Raman-active particles.

The pulse duration can be tuned from a minimum to arbitrarily long values.

Abstract

We study theoretically a new possibility of unipolar pulses generation in Raman-active medium excited by a series of few-cycle optical pulses. We consider the case when the Raman-active particles are uniformly distributed along the circle, and demonstrate a possibility to obtain a unipolar rectangular video pulses with an arbitrarily long duration, ranging from a minimum value equal to the natural period of the low frequency vibrations in the Raman-active medium.