Mixed metal dielectric pulse compression gratings

J. Néauport; N. Bonod; S. Hocquet; S. Palmier; E. Lavastre; N. Baclet; G. Dupuy

doi:10.1117/12.866869

29 November 2010 Mixed metal dielectric pulse compression gratings

J. Néauport, N. Bonod, S. Hocquet, S. Palmier, E. Lavastre, N. Baclet, G. Dupuy

Proceedings Volume 7842, Laser-Induced Damage in Optical Materials: 2010; 784209 (2010) https://doi.org/10.1117/12.866869
Event: Laser Damage Symposium XLII: Annual Symposium on Optical Materials for High Power Lasers, 2010, Boulder, Colorado, United States

Abstract

A Petawatt facility called PETAL (PETawatt Aquitaine Laser) is under development near the LIL (Ligne d'Integration Laser) at CEA Cesta, France. PETAL facility uses chirped pulse amplification (CPA) technique. This system needs large pulse compression grating exhibiting damage threshold of more than 4 J/cm² normal beam at 1.053μm and for 500fs pulses. In this paper, we study an alternative design to the classic multilayer dielectric (MLD) grating called "mixed metal-multilayer dielectric grating" (MMLD). This design consists in a gold reflective layer coated with a few pairs of HfO₂/SiO₂. The top low index SiO₂ layer of the stack is then engraved to receive the grating. We evidenced in a previous work that leads to high efficient pulse compression gratings. We have shown in last Boulder Damage Symposium that mixed mirror is equivalent to a "classic" MLD mirror. We herein detail the damage performances obtained on the MMLD gratings and compare them with these of MLD gratings.

Citation Download Citation

J. Néauport, N. Bonod, S. Hocquet, S. Palmier, E. Lavastre, N. Baclet, and G. Dupuy "Mixed metal dielectric pulse compression gratings", Proc. SPIE 7842, Laser-Induced Damage in Optical Materials: 2010, 784209 (29 November 2010); https://doi.org/10.1117/12.866869

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