Current limiting effects on laser compression by resonant backward Raman scattering

TL;DR

This paper investigates how plasma wave effects, specifically pump chirp and wavebreaking, limit the efficiency and pulse duration in laser pulse compression via resonant backward Raman scattering.

Contribution

It identifies key physical effects that currently constrain the efficiency of laser pulse amplification in Raman scattering experiments.

Findings

Efficiency is mainly limited by pump chirp and plasma wave wavebreaking.

Current experimental setups face fundamental limits due to these effects.

Understanding these effects can guide improvements in laser pulse compression techniques.

Abstract

Through resonant backward Raman scattering, the plasma wave mediates the energy transfer between long pump and short seed laser pulses. These mediation can result in pulse compression at extraordinarily high powers. However, both the overall efficiency of the energy transfer and the duration of the amplified pulse depend upon the persistence of the plasma wave excitation. At least with respect to the recent state-of-the-art experiments, it is possible to deduce that at present the experimentally realized efficiency of the amplifier is likely constrained mainly by two effects, namely the pump chirp and the plasma wave wavebreaking.