Four wave mixing based generation and control of light pulse

TL;DR

This paper demonstrates a scheme for generating, controlling, and storing four-wave mixing signals in rubidium atoms, enabling the preservation and manipulation of arbitrary optical pulse shapes.

Contribution

It introduces a novel method for controlling and storing FWM signals in atomic systems using a time-dependent control field, with potential applications in optical information processing.

Findings

FWM signals clone the temporal shape of probe pulses.

Signals can be stored and retrieved without shape or intensity loss.

The scheme works in an inhomogeneously broadened atomic medium.

Abstract

We present an efficient scheme for the generation and control of a degenerate four-wave mixing (FWM) signal in a N-type inhomogeneously broadened 85Rb atomic system. We observe the propagation dynamics of the generated FWM signal along with the probe pulse under the condition of Electromagnetically Induced Transparency. The FWM signal clones the temporal shape of the probe pulse and travels through the medium without changing its shape and intensity. We have also shown that a time dependent control field permits the storage and retrieval of these optical signals without losing their identity. This work allows us to generate, control, store and retrieve FWM signal of any arbirary shape.