Laser-induced damage threshold comparison of reactive low voltage ion plated and e-beam coatings
- Lawrence Livermore National Lab., CA (United States)
- University of Central Florida, Orlando, FL (United States). Center for Electro-Optics and Lasers
Single layer coatings of hafnia are included with results obtained with titania, tantala, zirconia and silica. These coatings were deposited by a reactive low voltage ion plating (RLVIP) and conventional reactive e-beam process. Layer thicknesses were optically a {lambda}/4 at 532 nm. The RMS surface roughness changes between the uncoated and coated were on the sub-angstrom level. The spectral transmittance curves demonstrated the material thickness homogeneity aspect of the RLVIP process. Laser damage thresholds were made from high peak power (1.06 {mu}m and 0.532 {mu}m, 10 ns) and high average power (511 nm and 578 nm) laser damage test facilities. Given a set of coatings from one process, the damage thresholds tended to increase as the refractive index decreased. The e-beam silica coating had the highest damage threshold, exceeding 98 J/cm{sup 2} (1.06 {mu}m, 10 ns, 10 Hz). In addition, the surface absorption and refractive indices of the coatings were measured, and the X-ray diffraction patterns of the hafnia coatings made.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5844054
- Report Number(s):
- UCRL-JC-108716; CONF-911064--8; ON: DE92008561
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360601 -- Other Materials-- Preparation & Manufacture
360605* -- Materials-- Radiation Effects
BEAMS
CHALCOGENIDES
COATINGS
COMPARATIVE EVALUATIONS
DAMAGE
DEPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
EQUIPMENT
EVALUATION
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
ION BEAMS
LASER RADIATION
LEPTON BEAMS
MINERALS
OPTICAL EQUIPMENT
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
RADIATIONS
REFRACTORY METAL COMPOUNDS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SURFACE COATING
SURFACE PROPERTIES
TANTALUM COMPOUNDS
TANTALUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
VAPOR DEPOSITED COATINGS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES