
Proceedings Paper
Refractive index change mechanisms in different glasses induced by femtosecond laser irradiationFormat | Member Price | Non-Member Price |
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Paper Abstract
Tightly focused femtosecond laser pulses can be used to alter the refractive index of virtually all optical glasses. As the
laser-induced modification is spatially limited to the focal volume of the writing beam, this technique enables the
fabrication of fully three-dimensional photonic structures and devices that are automatically embedded within the host
material. While it is well understood that the laser-material interaction process is initiated by nonlinear, typically
multiphoton absorption, the actual mechanism that results in an increase or sometimes decrease of the refractive index of
the glass strongly depends on the composition of the material and the process parameters and is still subject to scientific
studies.
In this paper, we present an overview of our recent work aimed at uncovering the physical and chemical processes that
contribute to the observed material modification. Raman microscopy and electron microprobe analysis was used to study
the induced modifications that occur within the glass matrix and the influence of atomic species migration forced by the
femtosecond laser writing beam. In particular, we concentrate on borosilicate, heavy metal fluoride and phosphate glasses.
We believe that our results represent an important step towards the development of engineered glass types that are ideally
suited for the fabrication of photonic devices via the femtosecond laser direct write technique.
Paper Details
Date Published: 22 July 2016
PDF: 7 pages
Proc. SPIE 9983, Pacific Rim Laser Damage 2016: Optical Materials for High-Power Lasers, 99830W (22 July 2016); doi: 10.1117/12.2237368
Published in SPIE Proceedings Vol. 9983:
Pacific Rim Laser Damage 2016: Optical Materials for High-Power Lasers
Takahisa Jitsuno; Jianda Shao; Wolfgang Rudolph, Editor(s)
PDF: 7 pages
Proc. SPIE 9983, Pacific Rim Laser Damage 2016: Optical Materials for High-Power Lasers, 99830W (22 July 2016); doi: 10.1117/12.2237368
Show Author Affiliations
A. Fuerbach, Macquarie Univ. (Australia)
S. Gross, Macquarie Univ. (Australia)
D. Little, Macquarie Univ. (Australia)
A. Arriola, Macquarie Univ. (Australia)
S. Gross, Macquarie Univ. (Australia)
D. Little, Macquarie Univ. (Australia)
A. Arriola, Macquarie Univ. (Australia)
M. Ams, Macquarie Univ. (Australia)
P. Dekker, Macquarie Univ. (Australia)
M. Withford, Macquarie Univ. (Australia)
P. Dekker, Macquarie Univ. (Australia)
M. Withford, Macquarie Univ. (Australia)
Published in SPIE Proceedings Vol. 9983:
Pacific Rim Laser Damage 2016: Optical Materials for High-Power Lasers
Takahisa Jitsuno; Jianda Shao; Wolfgang Rudolph, Editor(s)
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