Sub-millimeter diameter filaments can develop from laser self-focusing in air. These filaments produce ultraviolet radiations in form of third harmonics and frequency upshifting. Using high-power laser we observed generation of third harmonic radiation in air.
© 2005 Optical Society of America
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
I. S. Alexeev, A. C. Ting, D. F. Gordon, J. R. Penano, P. Sprangle, and E. C. Briscoe, "Ultraviolet Light Generation by Intense Laser Filaments Propagating in Air," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2005), paper CMK6.
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