Statistics – Applications
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990boda.symp....1k&link_type=abstract
Presented at the Boulder Damage Symposium, Boulder, CO, 1-3 Nov. 1989
Statistics
Applications
Dielectrics, High Power Lasers, Laser Applications, Mirrors, Nova Laser System, Thin Films, Yield Point, Apertures, Hafnium Oxides, Neodymium Lasers, Silicon Dioxide, Yag Lasers
Scientific paper
The laser conditioning of dielectric thin film HR coatings has been studied as a practical method for the improvement of the damage thresholds of large area (1.1 m dia.) high power 1064 nm laser mirrors on the LLNL 120kJ, 100TW Nova laser system. Both HfO2/SiO2 and /ZrO2/SiO2 HR coatings were conditioned by rastering with a small ( approximately 0.2 mm) diameter beam from a pulsed (18 Hz, 8 ns) Nd-YAG laser (1064 nm). The samples were rastered at various fluences below the unconditioned damage threshold and subsequently damage tested. Large area conditioning studies were also performed using a large aperture beam of the Nova laser. The laser conditioning effect was found to be permanent. Improvements in damage threshold due to conditioning were as high as a factor of 2.7 and were dependent on the conditioning parameters. A model for the conditioning effect is proposed based on emptying of electronic defect levels within.
Campbell John H.
Kozlowski Mark R.
Staggs M. C.
Wolfe Robert C.
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