Journal
OPTICA
Volume 5, Issue 4, Pages 402-408Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.5.000402
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- Institute for Basic Science [IBS-R012-D1]
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Temporal characterization of a laser pulse is an essential task in many applications. Temporal characterization methods that are currently available support only a limited spectral bandwidth without information on the carrier-envelope phase (CEP) of the laser pulse or require complicated equipment in a vacuum environment. Here we demonstrate that an arbitrary time-dependent laser field can be directly sampled using subcycle tunneling ionization in a gaseous medium or in air. The subcycle ionization is used as a fast temporal gate for the direct sampling of the laser field. This unique approach enables the complete temporal characterization of the laser field, including its CEP, for a broad spectral range in ambient air, providing a universal tool for the precise measurement of the laser field. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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