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research article

Stress-state manipulation in fused silica via femtosecond laser irradiation

Bellouard, Yves  
•
Champion, Audrey
•
Mcmillen, Benjamin  
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2016
Optica

Controlling the stress in glass after laser exposure is of prime importance not only for photonics applications, but also for preserving the mechanical integrity of glass components in general. The sub-surface exposure of fused silica to femtosecond laser pulses can induce a permanent and localized modification to the glass structure. In this work, we present evidence that femtosecond laser exposure can be used to continuously tailor the stress in the material, from a tensile to compressive state, as the laser pulse energy is changed. In addition, we demonstrate that this effect can not only be obtained while transitioning between different laser-induced microstructures, but also at low pulse energy, in the laser exposure regime particularly relevant for fabricating waveguides. These results demonstrate that femtosecond laser exposure is a versatile tool for fully controlling the stress landscape in a volume of silica, opening up new technological opportunities, like for instance, direct write stress-free waveguides, direct-write stress-induced birefringence state or mechanically reinforced parts, by locally preloading it. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.

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Type
research article
DOI
10.1364/Optica.3.001285
Web of Science ID

WOS:000390793900001

Author(s)
Bellouard, Yves  
Champion, Audrey
Mcmillen, Benjamin  
Mukherjee, Sebabrata
Thomson, Robert R.
Pepin, Charles  
Gillet, Philippe  
Cheng, Ya
Date Issued

2016

Publisher

Optical Soc Amer

Published in
Optica
Volume

3

Issue

12

Start page

1285

End page

1293

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
EPSL  
GALATEA  
Available on Infoscience
January 24, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/133509
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