High damage threshold mirrors and polarizers in the ZrO2/SiO2 and HfO2/SiO2 dielectric systems

Carine Fournet; B. Pinot; Bernard Geenen; Francis Ollivier; W. Alexandre; Herve G. Floch; Andre Roussel; C. Cordillot; Danielle Billon

doi:10.1117/12.60095

29 July 1992 High damage threshold mirrors and polarizers in the ZrO2/SiO2 and HfO2/SiO2 dielectric systems

Carine Fournet, B. Pinot, Bernard Geenen, Francis Ollivier, W. Alexandre, Herve G. Floch, Andre Roussel, C. Cordillot, Danielle Billon

Author Affiliations +

Proceedings Volume 1624, Laser-Induced Damage in Optical Materials: 1991; (1992) https://doi.org/10.1117/12.60095
Event: Laser-Induced Damage in Optical Materials: 1991, 1991, Boulder, CO, United States

Abstract

The Phebus Neodymium glass Laser system located at Centre d'Etudes de Limeil Valenton (CEL-V) is the most powerful in Europe (20 Id, 1 ns at = 1053nm and up to 8 U, 1 ns at = 351 nm). A major concern in the design of this system was the damage thresholds of the 1 meter diameter turning mirrors and of the large polarizers (0.3 m2). MATRA DEFENSE S .A. , in a joint effort with CEL-V, using the well known reactive e-beam process, has investigated and produced a new generation of efficient ZrO/SiO and HfO/SiO high reflective and polarizing coatings, leading to very high laser-conditioned damage thresholds. In addition to good flatness figures (t/4 to ?i /10 at He-Ne wavelength), excellent roughness values (5-10 A RMS) and excellent spectral characteristics, laser-conditioned damage thresholds were in the range of 25-30 J/cm2 and 12- 15 J/cm2 respectively for mirrors and polarizers at 1 .064 m wavelength for a 3 ns pulse. Such performances are respectively 2 and 6 times higher than those of same components in the Ti02/5i02 conventional design. Laser-conditioning effect, enhancing the damage threshold by at least a factor of 2, was observed as a durable improvement

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Carine Fournet, B. Pinot, Bernard Geenen, Francis Ollivier, W. Alexandre, Herve G. Floch, Andre Roussel, C. Cordillot, and Danielle Billon "High damage threshold mirrors and polarizers in the ZrO2/SiO2 and HfO2/SiO2 dielectric systems", Proc. SPIE 1624, Laser-Induced Damage in Optical Materials: 1991, (29 July 1992); https://doi.org/10.1117/12.60095

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