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Optica, Optics Express, 25(22), p. 31496, 2014

DOI: 10.1364/oe.22.031496

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Shaping and spatiotemporal characterization of sub-10-fs pulses focused by a high-NA objective

Journal article published in 2014 by Monika Pawłowska, Sebastian Goetz, Christian Dreher, Matthias Wurdack, Enno Krauss, Gary Razinskas ORCID, Peter Geisler, Bert Hecht, Tobias Brixner ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We describe a setup consisting of a 4 f pulse shaper and a microscope with a high-NA objective lens and discuss the aspects most relevant for an undistorted spatiotemporal profile of the focused beam. We demonstrate shaper-assisted pulse compression in focus to a sub-10-fs dura-tion using phase-resolved interferometric spectral modulation (PRISM). We introduce a nanostructure-based method for sub-diffraction spatiotemporal characterization of strongly focused pulses. The distortions caused by optical aberrations and space–time coupling from the shaper can be reduced by careful setup design and alignment to about 10 nm in space and 1 fs in time.