Dynamics of bulk modification inside glass by femtosecond laser

Masaaki Sakakura; Masahide Terazima; Kiyotaka Miura; Yasuhiko Shimotsuma; Kazuyuki Hirao

doi:10.1117/12.786951

15 January 2008 Dynamics of bulk modification inside glass by femtosecond laser

Masaaki Sakakura, Masahide Terazima, Kiyotaka Miura, Yasuhiko Shimotsuma, Kazuyuki Hirao

Proceedings Volume 6985, Fundamentals of Laser Assisted Micro- and Nanotechnologies; 698509 (2008) https://doi.org/10.1117/12.786951
Event: Fundamentals of Laser Assisted Micro- and Nanotechnologies, 2007, St. Petersburg, Russian Federation

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.

Citation Download Citation

Masaaki Sakakura, Masahide Terazima, Kiyotaka Miura, Yasuhiko Shimotsuma, and Kazuyuki Hirao "Dynamics of bulk modification inside glass by femtosecond laser", Proc. SPIE 6985, Fundamentals of Laser Assisted Micro- and Nanotechnologies, 698509 (15 January 2008); https://doi.org/10.1117/12.786951

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