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Proceedings Paper

Dynamics of bulk modification inside glass by femtosecond laser
Author(s): Masaaki Sakakura; Masahide Terazima; Kiyotaka Miura; Yasuhiko Shimotsuma; Kazuyuki Hirao
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Paper Abstract

A femtosecond laser machining has been utilized to fabricate various optical devices inside transparent material. To elucidate the mechanism of the femtosecond laser induced structural change inside a glass, we have observed the dynamics of the structural change and detected pressure wave propagation by a Transient Lens (TrL) method. Although the pressure wave generation has been already observed in our previous study, the analysis to obtain the temporal evolution of the refractive index distribution change was rather complex. In this study, we show alternative analysis method for TrL signals of bulk modification inside glass by femtosecond laser. From the analysis, the dynamics of the structural change including refractive index change at the center and shape of pressure wave becomes clear.

Paper Details

Date Published: 15 January 2008
PDF: 8 pages
Proc. SPIE 6985, Fundamentals of Laser Assisted Micro- and Nanotechnologies, 698509 (15 January 2008); doi: 10.1117/12.786951
Show Author Affiliations
Masaaki Sakakura, Kyoto Univ. (Japan)
Masahide Terazima, Kyoto Univ. (Japan)
Kiyotaka Miura, Kyoto Univ. (Japan)
Yasuhiko Shimotsuma, Kyoto Univ. (Japan)
Kazuyuki Hirao, Kyoto Univ. (Japan)


Published in SPIE Proceedings Vol. 6985:
Fundamentals of Laser Assisted Micro- and Nanotechnologies

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