Spectral dependence of damage resistance of refractory oxide optical coatings
Conference
·
OSTI ID:7267412
The laser damage thresholds of three refractory oxide material coatings (TiO/sub 2/, ZrO/sub 2/ and HfO/sub 2/) and SiO/sub 2/ were measured at three wavelengths (355, 532, and 1064 nm). For each wavelength, quarter-wave thick films were deposited on fused silica substrates by three manufacturers using electron-gun evaporation. Samples were irradiated with the primary, doubled and tripled frequency of a mode-locked Nd:YAG laser with pulse duration 20 to 30 ps. An increase of the threshold electric field from 1064 to 532 nm was measured, which was consistent with that predicted for electron-avalanche breakdown. Reduced thresholds at 355 nm indicated dominance of two-photon absorption.
- Research Organization:
- Los Alamos Scientific Lab., N.Mex. (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7267412
- Report Number(s):
- LA-UR-76-1646; CONF-760724-3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ABSORPTION
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
LASER RADIATION
MASSLESS PARTICLES
MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTONS
PHYSICAL RADIATION EFFECTS
PULSES
RADIATION EFFECTS
RADIATIONS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SUBSTRATES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
360206* -- Ceramics
Cermets
& Refractories-- Radiation Effects
42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ABSORPTION
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
LASER RADIATION
MASSLESS PARTICLES
MINERALS
OXIDES
OXYGEN COMPOUNDS
PHOTONS
PHYSICAL RADIATION EFFECTS
PULSES
RADIATION EFFECTS
RADIATIONS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SUBSTRATES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES