Ultrashort UV pulse generation by four-wave mixing through filamentation

Takao Fuji; Peng Zuo; Toshinori Suzuki

doi:10.1117/12.880921

6 January 2011 Ultrashort UV pulse generation by four-wave mixing through filamentation

Takao Fuji, Peng Zuo, Toshinori Suzuki

Proceedings Volume 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics; 799306 (2011) https://doi.org/10.1117/12.880921
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

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, ω_SHG) and near infrared pulses (1200 nm, ω_NIR) from a noncollinear optical parametric amplifier were gently focused into neon gas, and ultrashort pulses with the center wavelengths of 237 nm (ω_fwm) and 167 nm (ω_cas) were produced by four-wave mixing processes ω_SHG + ω_SHG - ω_NIR → ω_fwm and ω_fwm + ω_SHG - ω_NIR → ω_cas, 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.

Citation Download Citation

Takao Fuji, Peng Zuo, and Toshinori Suzuki "Ultrashort UV pulse generation by four-wave mixing through filamentation", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 799306 (6 January 2011); https://doi.org/10.1117/12.880921

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KEYWORDS

Near infrared

Ultraviolet radiation

Four wave mixing

Vacuum ultraviolet

Second-harmonic generation

Prisms

Crystals

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