High harmonic cutoff energy scaling and laser intensity measurement with a 1.8 μm laser source

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DOIResolve DOI: http://doi.org/10.1080/09500340.2013.765067
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Modern Optics
ISSN0950-0340
1362-3044
Volume60
Issue17
Pages14581465
SubjectHigh harmonic generation; Phase matching
AbstractHigh harmonic generation in gas targets leads to the production of attosecond pulses. The process of high harmonic generation requires that the gas be ionized by an intense femtosecond laser field. The highest photon energy produced is related to the laser intensity times the wavelength squared. This cutoff is reached only if good phase matching is achieved. Using a laser with a wavelength of 1800 nm, we estimate the laser intensity in the gas jet by recording the ion yield, and simultaneously record the high harmonic spectrum. We show that the cutoff energy matches the measured intensity, confirming that good phase matching is achieved to 100 eV. We also use the ion collector to characterize the spatial size of the gas jet and to measure the confocal parameter of the laser beam, parameters that are useful for numerical modelling.
Publication date
PublisherTaylor & Francis
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedYes
NPARC number23000540
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Record identifierb8aa3aa5-6df7-4317-82c1-b18e93fb94b2
Record created2016-07-28
Record modified2016-07-28
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