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Gradient enhanced third harmonic generation in a femtosecond filament |
Optics Letters, Vol. 36, Issue 22, pp. 4389-4391 (2011)
http://dx.doi.org/10.1364/OL.36.004389
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Abstract
The third harmonic generated during femtosecond filamentation in air is studied. By establishing a gradient from atmospheric pressure to vacuum conditions, we truncate the filament abruptly at defined positions. The introduction of the pressure gradient leads to an enhancement of the generated third harmonic radiation by 3 orders of magnitude. This effect is attributed to an improved on-axis phase-matching condition. We investigate the spectral shape and the conversion efficiency of the third harmonic during the propagation in the filament.
© 2011 Optical Society of America
OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.0190) Nonlinear optics : Nonlinear optics
(190.4160) Nonlinear optics : Multiharmonic generation
(320.0320) Ultrafast optics : Ultrafast optics
(320.5520) Ultrafast optics : Pulse compression
(320.6629) Ultrafast optics : Supercontinuum generation
ToC Category:
Ultrafast Optics
History
Original Manuscript: August 18, 2011
Revised Manuscript: October 6, 2011
Manuscript Accepted: October 6, 2011
Published: November 15, 2011
Citation
Emilia Schulz, Daniel S. Steingrube, Tobias Vockerodt, Thomas Binhammer, Uwe Morgner, and Milutin Kovačev, "Gradient enhanced third harmonic generation in a femtosecond filament," Opt. Lett. 36, 4389-4391 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-22-4389
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