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Photonics 2017, 4(1), 14;

Design Study of Time-Preserving Grating Monochromators for Ultrashort Pulses in the Extreme-Ultraviolet and Soft X-Rays

Institute of Photonics and Nanotechnologies, National Research Council of Italy, via Trasea 7, I-35131 Padova, Italy
Department of Information Engineering, University of Padova, via Gradenigo 6/B, I-35131 Padova, Italy
Author to whom correspondence should be addressed.
Received: 30 January 2017 / Revised: 23 February 2017 / Accepted: 27 February 2017 / Published: 1 March 2017
(This article belongs to the Special Issue Extreme UV Lasers: Technologies and Applications)
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The design of grating-based instruments to handle and condition coherent ultrafast pulses in the extreme-ultraviolet is discussed. The main application of such instruments is the monochromatization of high-order laser harmonics and free-electron-laser pulses in the femtosecond time scale. Broad-band monochromators require the use of diffraction gratings at grazing incidence. A grating can be used for the spectral selection of ultrashort pulses without altering the pulse duration in a significant way, provided that the number of illuminated grooves is equal to the resolution. We discuss here the design conditions to be fulfilled by a grating monochromator that does not increase the pulse duration significantly longer than the Fourier limit. View Full-Text
Keywords: diffraction gratings; ultrafast optics; monochromators diffraction gratings; ultrafast optics; monochromators

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Frassetto, F.; Fabris, N.; Miotti, P.; Poletto, L. Design Study of Time-Preserving Grating Monochromators for Ultrashort Pulses in the Extreme-Ultraviolet and Soft X-Rays. Photonics 2017, 4, 14.

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