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Realization of a time-compensated monochromator exploiting conical diffraction for few-femtosecond XUV pulses

Published online by Cambridge University Press:  26 July 2007

L. Poletto  and
P. Villoresi
L. Poletto
Affiliation:
INFM/CNR-LUXOR Laboratory for UV and X-Ray Optical Research and DEI – University of Padova, Padova, Italy
P. Villoresi
Affiliation:
INFM/CNR-LUXOR Laboratory for UV and X-Ray Optical Research and DEI – University of Padova, Padova, Italy
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Abstract

The general issue of the spectral selection of a portion of the wide extreme-ultraviolet spectrum obtained via extreme nonlinear processes as high order harmonic generation includes the problem of maintaining the ultrafast temporal duration of the pulses. In this paper, we present an instrument in which the pulse selection is operated in the wide wavelength range from 17 nm to above 60 nm, which is the central portion of the high-harmonics spectrum, with an instrumental function of about three femtoseconds. The design of the monochromator is based on the conical diffraction, which realizes very high diffraction efficiency by exploiting the specular reflection on the grating facets long-wise illuminated. The optical layout makes use of two gratings in the compensated-monochromator scheme already presented by the authors. The discussion of the residual aberration is also presented, with the aims to investigate the ultimate temporal resolution obtainable by this scheme.

Keywords

High harmonics generationUltra-short pulsesXUV-optics
Type
Research Article
Information
Laser and Particle Beams , Volume 25 , Issue 3 , September 2007 , pp. 391 - 396
Copyright
© 2007 Cambridge University Press

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