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Proceedings Paper

Ultrashort UV pulse generation by four-wave mixing through filamentation
Author(s): Takao Fuji; Peng Zuo; Toshinori Suzuki
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Paper Abstract

Ultraviolet (UV) and vacuum-UV pulses (VUV) were simultaneously generated by using four-wave mixing through filamentation in neon gas. Second harmonic of Ti:sapphire laser output (400 nm, ωSHG) and near infrared pulses (1200 nm, ωNIR) from a noncollinear optical parametric amplifier were gently focused into neon gas, and ultrashort pulses with the center wavelengths of 237 nm (ωfwm) and 167 nm (ωcas) were produced by four-wave mixing processes ωSHG + ωSHG - ωNIR → ωfwm and ωfwm + ωSHG - ωNIR → ωcas, respectively. The energy of the generated 237 nm pulse was more than one micro joule. Transfer of spectral phase from the near infrared ultrashort pulses to the UV pulses through the four-wave mixing process was also demonstrated. The even order spectral phase of the near infrared pulse was transfered to the UV pulse with the opposite sign, whereas the odd order spectral phase was transfered with the same sign. A positively chirped near infrared pulse was used for generating a negatively chirped UV pulse, which was compressed down to 25 fs by a magnesium fluoride window. In principle, the spectral phase transfer scheme can also be applied to the chirp control of the generated VUV pulses.

Paper Details

Date Published: 6 January 2011
PDF: 10 pages
Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 799306 (6 January 2011); doi: 10.1117/12.880921
Show Author Affiliations
Takao Fuji, RIKEN (Japan)
Japan Science and Technology Agency, CREST (Japan)
Institute for Molecular Science (Japan)
Peng Zuo, RIKEN (Japan)
Japan Science and Technology Agency, CREST (Japan)
Toshinori Suzuki, RIKEN (Japan)
Japan Science and Technology Agency, CREST (Japan)
Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 7993:
ICONO 2010: International Conference on Coherent and Nonlinear Optics
Claude Fabre; Victor Zadkov; Konstantin Drabovich, Editor(s)

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