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Published on: July 18, 2015
Mixed metal dielectric gratings for pulse compression
J Neauport1, N Bonod, S Hocquet
1Commissariat à l’énergie atomique, Centre d’études scientifiques et techniques d’Aquitaine, BP 2, 33114 Le Barp, France. jerome.neauport@cea.fr
Optics Express
|December 18, 2010
Summary
High efficiency mixed metal dielectric gratings (MMLD) offer a new solution for high power pulse compression. These gratings achieve damage thresholds near 3 J/cm², rivaling traditional options.
Area of Science:
- Optics and Photonics
- Materials Science
- Laser Technology
Background:
- High power laser systems require efficient pulse compression.
- Traditional gratings face limitations in high-power applications.
- Mixed metal dielectric gratings (MMLD) present a novel approach.
Purpose of the Study:
- To manufacture and test novel MMLD for high power pulse compression.
- To investigate the relationship between grating profile and damage threshold.
- To evaluate MMLD as an alternative to existing technologies.
Main Methods:
- Fabrication of MMLD with 1780 l/mm grating density.
- Etching gratings into the low index layer of a mirror stack.
- Damage testing at 1.053 µm with 500 fs pulse duration.
Main Results:
- Damage threshold is directly correlated with maximum electric field intensity within the grating.
- Achieved damage thresholds close to 3 J/cm² (beam normal).
- MMLD gratings demonstrate high efficiency and laser-induced damage resistance.
Conclusions:
- MMLD gratings are a promising alternative for high power pulse compression.
- Optimized grating profiles enhance laser-induced damage threshold.
- These gratings offer a competitive solution compared to gold and pure dielectric gratings.
