Spectral-temporal measurement capabilities of third-order correlators

We present a method extending scanning third-order correlator temporal pulse evolution measurement capabilities of high power short pulse lasers to spectral sensitivity within the spectral range exploited by typical chirped pulse amplification systems. Modelling of the spectral response achieved by angle tuning of the third harmonic generating crystal is applied and experimentally validated. Exemplary measurements of spectrally resolved pulse contrast of a Petawatt laser frontend illustrate the importance of full bandwidth coverage for the interpretation of relativistic laser target interaction in particular for the case of solid targets. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

We propose a method to extend the measurement capabilities of high power short pulse lasers by incorporating spectral sensitivity, specifically within the range used in chirped pulse amplification systems. The spectral response achieved through angle tuning of the third harmonic generating crystal is modeled and experimentally validated. Measurements of spectrally resolved pulse contrast of a Petawatt laser frontend illustrate the significance of full bandwidth coverage in interpreting laser target interactions, particularly with solid targets.