Laser damage testing of coated reflectors at excimer laser wavelengths
An important parameter in the design of large-scale ultraviolet lasers (such as those envisioned for Inertial Confinement Fusion and Molecular Laser Isotope Separation) is the resistance to optical damage of windows, AR-coatings, and coated reflectors. In addressing the problem of evaluating and optimizing highly reflective dielectric stacks, we have measured the damage thresholds of a variety of 248-nm, 308-nm, and 351-nm reflectors. The coatings were composed of quarterwave stacks of oxide and/or fluoride films deposited on Suprasil 2 substrates. Testing was accomplished at 35 Hz with nominal 10-ns pulses focused to a mean 1/e/sup 2/ diameter of 0.5 to 0.6 mm. Damage threshold (defined as the highest fluence at which 10/10 sites survived 1000 shots) ranged from 1 to 5 J/cm/sup 2/, with a strong dependence upon laser wavelength and reflector coating materials.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6362416
- Report Number(s):
- LA-UR-81-1567; CONF-810429-33; TRN: 81-010655
- Resource Relation:
- Conference: Conference on optics, Santa Fe, NM, USA, 6 Apr 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
LASERS
REFLECTIVE COATINGS
DAMAGE
ALUMINIUM
ALUMINIUM FLUORIDES
ALUMINIUM OXIDES
BERYLLIUM OXIDES
DIELECTRIC MATERIALS
HAFNIUM OXIDES
LASER RADIATION
LEAD FLUORIDES
MAGNESIUM FLUORIDES
MAGNESIUM OXIDES
SCANDIUM OXIDES
SILICON OXIDES
SODIUM FLUORIDES
THORIUM FLUORIDES
ULTRAVIOLET RADIATION
ZIRCONIUM OXIDES
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BERYLLIUM COMPOUNDS
CHALCOGENIDES
COATINGS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HAFNIUM COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LEAD COMPOUNDS
LEAD HALIDES
MAGNESIUM COMPOUNDS
MATERIALS
METALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SCANDIUM COMPOUNDS
SILICON COMPOUNDS
SODIUM COMPOUNDS
THORIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
420300* - Engineering- Lasers- (-1989)
050503 - Nuclear Fuels- Uranium Enrichment- Laser Excitation- (-1989)