Título:
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All-solid-state VUV frequency comb at 160 nm using high-harmonic generation in nonlinear femtosecond enhancement cavity
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Autor/a:
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Seres, Jozsef; Seres, Enikoe; Serrat Jurado, Carles; Young, E. C.; Speck, J.S.; Schumm, T.
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers |
Abstract:
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© 2019 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. |
Abstract:
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We realized a solid-state-based vacuum ultraviolet frequency comb by harmonics
generation in an external enhancement cavity. Optical conversions were so far reported by
only using gaseous media. We present a theory that allows the most suited solid generation
medium to be selected for specific target harmonics by adapting the material’s bandgap. We
experimentally use a thin AlN film grown on a sapphire substrate to realize a compact
frequency comb high-harmonic source in the Deep Ultraviolet (DUV)/Vacuum
Ultraviolet/Deep Ultraviolet (VUV) spectral range. By extending our earlier VUV source
[Opt. Express 26, 21900 (2018)] with the enhancement cavity, a sub-Watt level Ti:sapphire
femtosecond frequency comb is enhanced to 24 W stored average power, its 3rd, 5th, and 7th
harmonics are generated, and the targeted 5th harmonic’s power at 160 nm increased by two
orders of magnitude. The emerging nonlinear effects in the solid medium, together with
suitable intra-cavity dispersion management, support optimal enhancement and stable
locking. To demonstrate the realized frequency comb’s spectroscopic ability, we report on the
beat measurement between the 3rd harmonic beam and a 266 nm CW laser reaching about 1
MHz accuracy. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Física -Solid state physics -Ultraviolet radiation -Física de l'estat sòlid -Radiació ultraviolada |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
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