Accumulation effect of multi-shot laser-induced damage to optical coatings

wang tao; zhao yuan-an; huang jian-bing; he hong-bo; shao jian-da; fan zheng-xiu; 

Volume 17 Issue 05s

May 2005

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Article Navigation > High Power Laser and Particle Beams > 2005 > 17(05s): 0-

wang tao, zhao yuan-an, huang jian-bing, et al. Accumulation effect of multi-shot laser-induced damage to optical coatings[J]. High Power Laser and Particle Beams, 2005, 17.

Citation:

wang tao, zhao yuan-an, huang jian-bing, et al. Accumulation effect of multi-shot laser-induced damage to optical coatings[J]. High Power Laser and Particle Beams, 2005, 17.

wang tao, zhao yuan-an, huang jian-bing, et al. Accumulation effect of multi-shot laser-induced damage to optical coatings[J]. High Power Laser and Particle Beams, 2005, 17.

Citation:

wang tao, zhao yuan-an, huang jian-bing, et al. Accumulation effect of multi-shot laser-induced damage to optical coatings[J]. High Power Laser and Particle Beams, 2005, 17.

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Accumulation effect of multi-shot laser-induced damage to optical coatings

1.
R&D Center for Optical Thin Film Coatings,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,P.O.Box 800-211,Shanghai 201800,China;
2.
Graduate School of the Chinese Academy of Science,Beijing 100039,China

Publish Date: 2005-05-20

Abstract

Abstract

The accumulation effect of multi-shot laser-induced damage to optical coatings was investigated. Laser damage testing was performed at 1 064 nm with nanosecond pulses at a pulse length of 12 ns, using an accurate and reliable measurement system. The damage threshold and the number of shots were studied by a statistical method. Compared with the case of single shot laser damage, it is concluded that the microdefects in the optical coatings are responsible for the multiple-pulse damage to mirrors. The damage mechanism can be used to explain the damage process. The expressions for the damage threshold and the number of shots are founded. Nomarski microscope was employed to observe the laser-induced damage morphology after laser irradiation．
- ta2o5/sio2 dielectric mirrors,
- accumulation effect,
- multi-shot,
- microdefect

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