Focusing transmission gratings for high-energy lasers

Bruno M. Touzet; Jean Flamand; Alain Thevenon; Viviane Millet; Francis Bonnemason; Philippe Gacoin; Benoit Deville

doi:10.1117/12.354155

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23 July 1999 Focusing transmission gratings for high-energy lasers

Bruno M. Touzet, Jean Flamand, Alain Thevenon, Viviane Millet, Francis Bonnemason, Philippe Gacoin, Benoit Deville

Author Affiliations +

Proceedings Volume 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion; (1999) https://doi.org/10.1117/12.354155
Event: Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, 1998, Monterey, CA, United States

Abstract

To focus the third harmonic of high energy neodymium glass laser, the usage of focusing transmissions diffractive gratings ion etched directly into fused silica blank brings major benefits in comparison with classical optical solutions using aspheric lenses. The damage threshold of such a diffractive component is the same as the damage threshold of a high grade, thin, fused silica plane window. The transmission efficiency reaches 94 percent for polarization s or p. The image quality is nearly perfect: this diffractive component acts as a stigmatic lens. It separates the remaining first and second harmonic from the third one and in addition it creates a focused reflective order with 0.5 percent efficiency which offers the possibility to get a well focused sampling beam.

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Bruno M. Touzet, Jean Flamand, Alain Thevenon, Viviane Millet, Francis Bonnemason, Philippe Gacoin, and Benoit Deville "Focusing transmission gratings for high-energy lasers", Proc. SPIE 3492, Third International Conference on Solid State Lasers for Application to Inertial Confinement Fusion, (23 July 1999); https://doi.org/10.1117/12.354155

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