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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 1104–1114

Beam separator for high-order harmonic radiation in the 3 10 nm spectral region

Fabio Frassetto, Paolo Villoresi, and Luca Poletto  »View Author Affiliations

JOSA A, Vol. 25, Issue 5, pp. 1104-1114 (2008)

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We present the scheme of a beam separator for ultrashort high-order harmonic radiation below 10 nm . The system consists of a collimating mirror and two plane grazing-incidence gratings in compensated configuration. The first grating acts as the beam separator: it diffracts the extreme ultraviolet (XUV) light into the first order while reflecting the fundamental laser beam into the zero order. The diffracted light goes to a second grating that compensates both for the spectral dispersion and for the temporal broadening of the XUV ultrashort pulse caused by the diffraction at the first grating. The system can be designed for any wavelength in the 3 40 nm region. Since the gratings are operated at extreme grazing incidence, the area of the optical surface illuminated by the fundamental laser pulse is large, and therefore there is no risk of damage of the optical surfaces. The effects on the phase of the ultrashort pulse for narrowband applications are discussed.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(190.4160) Nonlinear optics : Multiharmonic generation
(320.0320) Ultrafast optics : Ultrafast optics

ToC Category:
Nonlinear Optics

Original Manuscript: December 21, 2007
Manuscript Accepted: February 22, 2008
Published: April 22, 2008

Fabio Frassetto, Paolo Villoresi, and Luca Poletto, "Beam separator for high-order harmonic radiation in the 3-10 nm spectral region," J. Opt. Soc. Am. A 25, 1104-1114 (2008)

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