Measurement and Control of Main Spatio-Temporal Couplings in a CPA Laser Chain

TL;DR

This paper introduces a simple method to control key spatio-temporal couplings in a CPA laser chain using a specially designed chromatic doublet, enhancing the laser's performance by managing spatial chirp and longitudinal chromatism.

Contribution

The paper presents a novel, straightforward approach employing a chromatic doublet to effectively control spatio-temporal couplings in a CPA laser chain.

Findings

Effective control of spatial chirp achieved

Wide dynamic range for longitudinal chromatism control

Simple measurement method using an ultrafast pulse shaper

Abstract

We report a straightforward method to control main spatio-temporal couplings in a CPA laser chain system using a specially designed chromatic doublet in a divergent beam configuration. The centering of the doublet allows for the control of the spatial chirp of the CPA laser chain, while its longitudinal position in the divergent beam enables the control of the amount of longitudinal chromatism in a wide dynamic range. The performance of this technique is evaluated by measuring main spatio-temporal couplings with a simple method, based on an ultrafast pulse shaper, which allows for a selection of narrow windows of the spectrum.