Abstract

A laser damage test method based on damage size analysis (DSA) is described that simplifies the derivation of the lifetime optical damage threshold of film materials critical in the design of devices used in high-repetition-rate, high-power laser systems. The DSA method presented here is solely based on imaging to measure the damage site size produced from exposure to a known Gaussian-shaped beam with a fixed, systematically selected fluence well above the ablation threshold. The method locates the damage boundary produced from repeated exposures, using images with a high contrast, and maps it to the beam profile to extract a lifetime laser damage fluence threshold value. We validate the DSA approach using a few relevant transparent film material systems and by comparing it to the standard S/1 laser damage test method. The DSA method can be more efficient and accelerate materials development and validation necessary to support the design of high-power repetition-rated lasers and optoelectronic devices.

© 2017 Optical Society of America

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Supplementary Material (3)

NameDescription
» Code 1       Custom analysis by ImageJ macro to derive images for analysis as follows: Simply running the ImageJ macro and the two python codes in sequence, the result file is automatically generated.
» Code 2       Custom analysis by ImageJ macro to derive images for analysis as follows: Simply running the ImageJ macro and the two python codes in sequence, the result file is automatically generated.
» Code 3       Custom analysis by ImageJ macro to derive images for analysis as follows: Simply running the ImageJ macro and the two python codes in sequence, the result file is automatically generated.

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