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Proceedings Paper

High damage threshold mirrors and polarizers in the ZrO2/SiO2 and HfO2/SiO2 dielectric systems
Author(s): Carine Fournet; B. Pinot; Bernard Geenen; Francis Ollivier; W. Alexandre; Herve G. Floch; Andre Roussel; C. Cordillot; Danielle Billon
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Paper 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

Paper Details

Date Published: 29 July 1992
PDF: 12 pages
Proc. SPIE 1624, Laser-Induced Damage in Optical Materials: 1991, (29 July 1992); doi: 10.1117/12.60095
Show Author Affiliations
Carine Fournet, MATRA DET/DTO (France)
B. Pinot, MATRA DET/DTO (France)
Bernard Geenen, MATRA DET/DTO (France)
Francis Ollivier, MATRA DET/DTO (France)
W. Alexandre, MATRA DET/DTO (France)
Herve G. Floch, Ctr. d'Etudes de Limeil Valenton (France)
Andre Roussel, Ctr. d'Etudes de Limeil Valenton (France)
C. Cordillot, Ctr. d'Etudes de Limeil Valenton (France)
Danielle Billon, Ctr. d'Etudes de Limeil Valenton (France)


Published in SPIE Proceedings Vol. 1624:
Laser-Induced Damage in Optical Materials: 1991
Harold E. Bennett; Lloyd L. Chase; Arthur H. Guenther; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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