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

Masanao Kamata; Tetsuya Nagata; Minoru Obara

doi:10.1117/12.546870

20 September 2004 Waveguide fabrication in transparent materials by use of temporally tailored multiple femtosecond pulses

Masanao Kamata, Tetsuya Nagata, Minoru Obara

Author Affiliations +

Proceedings Volume 5448, High-Power Laser Ablation V; (2004) https://doi.org/10.1117/12.546870
Event: High-Power Laser Ablation, 2004, Taos, New Mexico, United States

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.

Citation Download Citation

Masanao Kamata, Tetsuya Nagata, and Minoru Obara "Waveguide fabrication in transparent materials by use of temporally tailored multiple femtosecond pulses", Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); https://doi.org/10.1117/12.546870

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