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Title: Mechanisms of laser-induced damage in absorbing glasses with nanosecond pulses

Abstract

The propagation of 355-nm, nanosecond pulses in absorbing glasses is investigated for the specific case examples of the broadband absorbing glass SuperGrey and the Ce 3+-doped silica glass. The study involves different laser irradiation conditions and material characterization methods to capture the transient material behaviors leading to laser-induced damage. Two damage-initiation mechanisms were identified: (1) melting of the surface as a result of increased temperature; and (2) self-focusing caused by a transient change in the index of refraction. Population of excited states greatly affects both mechanisms by increasing the transient absorption cross section via excited-state absorption and introducing a change of the refractive index to support the formation of graded-index lensing and self-focusing of the beam inside the material. The governing damage-initiation mechanism depends on the thermodynamic properties of the host glass, the electronic structure characteristics of the doped ion, and the laser-spot size.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1503044
Alternate Identifier(s):
OSTI ID: 1509716
Report Number(s):
2018-312; 1-475
Journal ID: ISSN 1094-4087; OPEXFF; 2018-312, 1475, 2434
Grant/Contract Number:  
NA0003856; AC52-07NA27344
Resource Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 27; Journal Issue: 7; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Demos, S. G., Hoffman, B. N., Carr, C. W., Cross, D. A., Negres, R. A., and Bude, J. D. Mechanisms of laser-induced damage in absorbing glasses with nanosecond pulses. United States: N. p., 2019. Web. doi:10.1364/OE.27.009975.
Demos, S. G., Hoffman, B. N., Carr, C. W., Cross, D. A., Negres, R. A., & Bude, J. D. Mechanisms of laser-induced damage in absorbing glasses with nanosecond pulses. United States. doi:10.1364/OE.27.009975.
Demos, S. G., Hoffman, B. N., Carr, C. W., Cross, D. A., Negres, R. A., and Bude, J. D. Tue . "Mechanisms of laser-induced damage in absorbing glasses with nanosecond pulses". United States. doi:10.1364/OE.27.009975.
@article{osti_1503044,
title = {Mechanisms of laser-induced damage in absorbing glasses with nanosecond pulses},
author = {Demos, S. G. and Hoffman, B. N. and Carr, C. W. and Cross, D. A. and Negres, R. A. and Bude, J. D.},
abstractNote = {The propagation of 355-nm, nanosecond pulses in absorbing glasses is investigated for the specific case examples of the broadband absorbing glass SuperGrey and the Ce3+-doped silica glass. The study involves different laser irradiation conditions and material characterization methods to capture the transient material behaviors leading to laser-induced damage. Two damage-initiation mechanisms were identified: (1) melting of the surface as a result of increased temperature; and (2) self-focusing caused by a transient change in the index of refraction. Population of excited states greatly affects both mechanisms by increasing the transient absorption cross section via excited-state absorption and introducing a change of the refractive index to support the formation of graded-index lensing and self-focusing of the beam inside the material. The governing damage-initiation mechanism depends on the thermodynamic properties of the host glass, the electronic structure characteristics of the doped ion, and the laser-spot size.},
doi = {10.1364/OE.27.009975},
journal = {Optics Express},
number = 7,
volume = 27,
place = {United States},
year = {2019},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1364/OE.27.009975

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