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Efficient generation of the 7th harmonic of Ti:sapphire (114.6 nm) vacuum ultraviolet pulses with 60 fs duration by non-collinear four-wave mixing in argon

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1364/OL.457070
AuthorSearch for: 1ORCID identifier: https://orcid.org/0000-0003-2097-5991; Search for: 2; Search for: 2
Affiliation
  1. National Research Council of Canada. Security and Disruptive Technologies
  2. National Research Council of Canada. Quantum and Nanotechnologies
FormatText, Article
Subjectdielectric mirrors; four wave mixing; harmonic generation; phase matching; sum frequency generation; ultrafast spectroscopy
Abstract
The recent advances in femtosecond vacuum UV (VUV) pulse generation, pioneered by the work of Noack et al., has enabled new experiments in ultrafast time-resolved spectroscopy. Expanding on this work, we report the generation of 60 fs VUV pulses at the 7th harmonic of Ti:sapphire with more than 50 nJ of pulse energy at a repetition rate of 1 kHz. The 114.6 nm pulses are produced using non-collinear four-wave difference-frequency mixing in argon. The non-collinear geometry increases the phase-matching pressure, and results in a conversion efficiency of ∼10−3 from the 200 nm pump beam. The VUV pulses are pre-chirp-compensated for material dispersion with xenon, which has negative dispersion in this wavelength range, thus allowing almost transform-limited pulses to be delivered to the experimental chamber.
Publication date
PublisherOptica Publishing Group
In
  • Optics Letters 47, no. 10 (3 May 2022): 2410–2413.
LanguageEnglish
Peer reviewedYes
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Record created2024-06-24
Record modified2024-06-25
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