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

Abstract

Far-field light scattering characteristics from randomly arranged shallow Gaussian-like shaped laser induced pits, found on optics exposed to high energy laser pulses, is studied. Closed-form expressions for the far-field intensity distribution and scattered power are derived for individual pits and validated using numerical calculations of both Fourier optics and FDTD solutions to Maxwell’s equations. It is found that the scattered power is proportional to the square of the pit width and approximately also to the square of the pit depth, with the proportionality factor scaling with pit depth. As a result, the power scattered from shallow pitted optics is expected to be substantially lower than assuming complete scattering from the total visible footprint of the pits.

Authors:
 [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1200897
Resource Type:
Accepted Manuscript
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 23; Journal Issue: 8; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Feigenbaum, Eyal, Elhadj, Selim, and Matthews, Manyalibo J. Light scattering from laser induced pit ensembles on high power laser optics. United States: N. p., 2015. Web. doi:10.1364/OE.23.010589.
Feigenbaum, Eyal, Elhadj, Selim, & Matthews, Manyalibo J. Light scattering from laser induced pit ensembles on high power laser optics. United States. doi:10.1364/OE.23.010589.
Feigenbaum, Eyal, Elhadj, Selim, and Matthews, Manyalibo J. Thu . "Light scattering from laser induced pit ensembles on high power laser optics". United States. doi:10.1364/OE.23.010589. https://www.osti.gov/servlets/purl/1200897.
@article{osti_1200897,
title = {Light scattering from laser induced pit ensembles on high power laser optics},
author = {Feigenbaum, Eyal and Elhadj, Selim and Matthews, Manyalibo J.},
abstractNote = {Far-field light scattering characteristics from randomly arranged shallow Gaussian-like shaped laser induced pits, found on optics exposed to high energy laser pulses, is studied. Closed-form expressions for the far-field intensity distribution and scattered power are derived for individual pits and validated using numerical calculations of both Fourier optics and FDTD solutions to Maxwell’s equations. It is found that the scattered power is proportional to the square of the pit width and approximately also to the square of the pit depth, with the proportionality factor scaling with pit depth. As a result, the power scattered from shallow pitted optics is expected to be substantially lower than assuming complete scattering from the total visible footprint of the pits.},
doi = {10.1364/OE.23.010589},
journal = {Optics Express},
number = 8,
volume = 23,
place = {United States},
year = {2015},
month = {1}
}

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Free Publicly Available Full Text
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Cited by: 11 works
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