Research of enhancing damage-thresholds of fused silica using UV laser treatment
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Received Date:
2008-01-30
Accepted Date:
2008-08-28
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Abstract
In order to study the influence of UV pulse laser pre-treatment on surface image of fused silica and validate its upgrade effect on anti UV laser damage ability of fused silica,using 355nm YAG laser raster to scan fused silica optics by means of power increase 6y degrees periodically,the change of surface image was studied and its anti-laser damage threshold at 355nm was measured.Test results showed that surface impurity was cleaned out and it was found that the zero probability damage-threshold increased 24% and 50% probability damage-threshold increased 19%.The result proves UV laser pre-treatment is an effective method to increase anti UV laser damage ability and break through the bottleneck of high power laser output at 355nm,laser pre-treatment have practical value in engineering.
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