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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 19 — Sep. 20, 2004
  • pp: 4430–4436

High harmonic generation in a semi-infinite gas cell

J. R. Sutherland, E. L. Christensen, N. D. Powers, S. E. Rhynard, J. C. Painter, and J. Peatross  »View Author Affiliations

Optics Express, Vol. 12, Issue 19, pp. 4430-4436 (2004)

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Ten-millijoule 35-femtosecond laser pulses interact with a cell of helium or neon that extends from a focusing lens to an exit foil near the laser focus. High harmonic orders in the range of 50 to 100 are investigated as a function of focal position relative to the exit foil. An aperture placed in front of the focusing lens increases the brightness of observed harmonics by more than an order of magnitude. Counter-propagating light is used to directly probe where the high harmonics are generated within the laser focus. In neon, the harmonics are generated in the last few millimeters before the exit foil, limited by absorption. In helium, the harmonics are produced over a much longer distance.

© 2004 Optical Society of America

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(260.7200) Physical optics : Ultraviolet, extreme

ToC Category:
Research Papers

Original Manuscript: August 2, 2004
Revised Manuscript: September 7, 2004
Published: September 20, 2004

Julia Sutherland, E. Christensen, N. Powers, S. Rhynard, J. Painter, and J. Peatross, "High harmonic generation in a semi-infinite gas cell," Opt. Express 12, 4430-4436 (2004)

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