Spectral-temporal Measurement Capabilities of Third-order Correlators

We present a method extending scanning third-order correlator temporal pulse14
evolution measurement capabilities of high power short pulse lasers to spectral sensitivity within15
the spectral range exploited by typical chirped pulse amplification systems. Modelling of the16
spectral response achieved by angle tuning of the third harmonic generating crystal is applied17
and experimentally validated. Exemplary measurements of spectrally resolved pulse contrast of a18
Petawatt laser frontend illustrate the importance of full bandwidth coverage for the interpretation19
of relativistic laser target interaction in particular for the case of solid targets.