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Optics Letters

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  • Vol. 27, Iss. 21 — Nov. 1, 2002
  • pp: 1944–1946

Coherent subterahertz radiation from femtosecond infrared filaments in air

S. Tzortzakis, G. Méchain, G. Patalano, Y.-B. André, B. Prade, M. Franco, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, and P. Encrenaz  »View Author Affiliations


Optics Letters, Vol. 27, Issue 21, pp. 1944-1946 (2002)
http://dx.doi.org/10.1364/OL.27.001944


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Abstract

We report on what is believed to be the first observation of coherent subterahertz (sub-THz) emission from a 1-m string in the atmosphere. The sub-THz pulse emitted by the filamentary structure from an intense IR femtosecond laser pulse is detected perpendicularly to the laser propagation axis by use of two heterodyne detectors at 94±1 and 118±1GHz . We describe the characteristics of this emission and show evidence of constructive interference between two separate strings.

© 2002 Optical Society of America

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(350.5400) Other areas of optics : Plasmas
(350.5610) Other areas of optics : Radiation

Citation
S. Tzortzakis, G. Méchain, G. Patalano, Y.-B. André, B. Prade, M. Franco, A. Mysyrowicz, J.-M. Munier, M. Gheudin, G. Beaudin, and P. Encrenaz, "Coherent subterahertz radiation from femtosecond infrared filaments in air," Opt. Lett. 27, 1944-1946 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-21-1944


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