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Proceedings Paper

Waveguide fabrication in transparent materials by use of temporally tailored multiple femtosecond pulses
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Paper Abstract

Permanent refractive index change in bulk glasses induced by femtosecond laser has opened up new ways for photonic devices fabrication. In this technique, temporal profile of femtosecond laser is found to be important because it is a nonlinear material processing. In this paper we investigate temporal profile dependence on the optical waveguides properties written by tightly focused femtosecond laser and loosely focused femtosecond laser. With tight focus writing, optimization of pulse interval of pulse train with a few ps decreased the optical loss of the fabricated waveguides. With loose focus writing, longer femtosecond laser increased the length of the induced refractive index change. 2-D Bragg diffraction gratings were well fabricated using this loose focus method.

Paper Details

Date Published: 20 September 2004
PDF: 10 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.546870
Show Author Affiliations
Masanao Kamata, Keio Univ. (Japan)
Tetsuya Nagata, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)

Published in SPIE Proceedings Vol. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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