Abstract

A model describing far-field scattered power and irradiance by a silica glass slab with a shallow-pitted exit surface is experimentally validated. The comparison to the model is performed using a precisely micromachined ensemble of $\sim 11\mathrm{\mu m}$ wide laser ablated shallow pits producing 1% of the incident beam scatter in a 10 mrad angle. A series of samples with damage initiations and laser-induced shallow pits resulting from 351 nm, 5 ns pulsed laser cleaning of metal microparticles at different fluences between $2\mathrm{J}/{\mathrm{cm}}^2$ and $11\mathrm{J}/{\mathrm{cm}}^2$ are characterized as well and found in good agreement with model predictions.

© 2015 Optical Society of America

Light scattering from laser induced pit ensembles on high power laser optics

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Laser-induced Hertzian fractures in silica initiated by metal micro-particles on the exit surface

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Interference effects in laser-induced plasma emission from surface-bound metal micro-particles

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Rear-surface laser damage on 355-nm silica optics owing to Fresnel diffraction on front-surface contamination particles

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