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Proceedings Paper

Positioning of Littrow mounted gratings in pulse compressors
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Paper Abstract

The development of chirped pulse amplification lasers toward multi-PetaWatt power imposes more demands on laser system elements. To make the spectral band of pulse compressors wider, laser designers began to consider Littrow mounted grating setups. In this study we investigate two Littrow type configurations. The first one is roll - a grating is rotated in the grating plane by a small angle. The second configuration is pitch - a grating is rotated by small angle about an axis perpendicular to the grating grooves. In this paper we experimentally measured diffraction efficiency of rolled and pitched dielectric grating, and simulated it with two methods: numerical Fourier Modal Method in LightTrans Virtual Lab and semi-analytical Volume Integral Equation Method. Here we claim that roll is more preferable for dielectric diffraction gratings with high groove density. It is shown that the energy of laser pulse compressed by a Littrow-roll configured compressor is 2 to 5% higher than Littrow-pitch configured one.

Paper Details

Date Published: 23 September 2015
PDF: 7 pages
Proc. SPIE 9626, Optical Systems Design 2015: Optical Design and Engineering VI, 96261R (23 September 2015); doi: 10.1117/12.2191304
Show Author Affiliations
Galina Kalinchenko, ELI Beamlines (Czech Republic)
Stepan Vyhlidka, ELI Beamlines (Czech Republic)
Charles Univ. in Prague (Czech Republic)
Daniel Kramer, ELI Beamlines (Czech Republic)
Alexander Lerer, Southern Federal Univ. (Russian Federation)
Bedrich Rus, ELI Beamlines (Czech Republic)


Published in SPIE Proceedings Vol. 9626:
Optical Systems Design 2015: Optical Design and Engineering VI
Laurent Mazuray; Rolf Wartmann; Andrew P. Wood, Editor(s)

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