Characterization of below threshold harmonics generated in argon by ultrashort laser pulses
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2018
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SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE
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Resumo
This work reports studies on the generation of
below threshold harmonics by ultrashort laser pulses in gas
nozzles in vacuum. Odd harmonics of the laser, ranging from
the 3rd up to the 9th, were generated in the UV and VUV
regions, and the frequency conversion occurred in flowing gas.
The harmonics were spectrally characterized, and the orders of
the nonlinear processes were determined, showing that, for the
higher order harmonics, competing processes decrease the
energy coupling into the new frequencies. Also, the conversion
efficiencies were estimated, showing that a few percent of the
laser pulse energy are converted into the harmonics.
Como referenciar
ZUFFI, ARMANDO V.F.; ALMEIDA, ANDREIA A.; VIEIRA JUNIOR, NILSON D.; SAMAD, RICARDO E. Characterization of below threshold harmonics generated in argon by ultrashort laser pulses. In: SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE, October 08-10, 2018, Campinas, SP. Proceedings... Piscataway, NJ, USA: IEEE, 2018. DOI: 10.1109/SBFoton-IOPC.2018.8610890. Disponível em: http://repositorio.ipen.br/handle/123456789/30135. Acesso em: 27 Mar 2026.
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