Determining beam resistance of large-scale optics by measuring thresholds for surface damage caused by low-size laser beams

D. I. Dmitriev; I. V. Ivanova; V. N. Pasunkin; V. S. Sirazetdinov

doi:10.1117/12.885998

22 March 2011 Determining beam resistance of large-scale optics by measuring thresholds for surface damage caused by low-size laser beams

D. I. Dmitriev, I. V. Ivanova, V. N. Pasunkin, V. S. Sirazetdinov

Author Affiliations +

Proceedings Volume 7822, Laser Optics 2010; 78220B (2011) https://doi.org/10.1117/12.885998
Event: Laser Optics 2010, 2010, St. Petersburg, Russian Federation

Abstract

The paper describes an experimental method of determining probability density distribution for random threshold values of laser fluence, damaging surface of optical components. The method is as follows. Numerous surface sites of an optical component have been irradiated by a laser beam with a known non-uniform fluence distribution and magnitude sufficient for surface damage. Subsequently, the minimal fluence value ε has beens determined at the boundary of the damaged zone for each irradiation spot. It is shown that the sampling of minimal damage threshold values obtained from the above-described data assembly makes it possible to construct the probability density distribution f(ε). Knowledge of this distribution provides for the use of order statistics in damage threshold fluence data analysis and, thus, enhances accuracy and reliability of determination of surface strength for sizable optic components tested by small-diameter beams.

Citation Download Citation

D. I. Dmitriev, I. V. Ivanova, V. N. Pasunkin, and V. S. Sirazetdinov "Determining beam resistance of large-scale optics by measuring thresholds for surface damage caused by low-size laser beams", Proc. SPIE 7822, Laser Optics 2010, 78220B (22 March 2011); https://doi.org/10.1117/12.885998

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