Characteristics of couplers and grating induced by self-trapped filament of femtosecond laser pulses

Wataru Watanabe; Taishi Asano; Kazuhiro Yamada; Junji Nishii; Kazuyoshi Itoh

doi:10.1117/12.478584

19 June 2003 Characteristics of couplers and gratings induced by self-trapped filament of femtosecond laser pulses

Wataru Watanabe, Taishi Asano, Kazuhiro Yamada, Junji Nishii, Kazuyoshi Itoh

Proceedings Volume 4978, Commercial and Biomedical Applications of Ultrafast Lasers III; (2003) https://doi.org/10.1117/12.478584
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

Abstract

Permanent refractive-index change can be induced by a self-trapped filament of infrared femtosecond laser pulses in silica glass. We present the fabrication of waveguides, couplers, and gratings by use of the self-trapped filament. The self-trapped filament with 30 μm long was found to bend from the direction of the incident laser pulses by two-dimensional translation. This technique leads to a formation of a permanent curved waveguide. We fabricate a 2-mm long directional coupler with the core diameter of 2 μm to split the coupled beam into 1:1. We also show the fabrication of gratings. Finally, we investigate the dependence of refractive-index change on polarization of incident laser pulses.

Citation Download Citation

Wataru Watanabe, Taishi Asano, Kazuhiro Yamada, Junji Nishii, and Kazuyoshi Itoh "Characteristics of couplers and gratings induced by self-trapped filament of femtosecond laser pulses", Proc. SPIE 4978, Commercial and Biomedical Applications of Ultrafast Lasers III, (19 June 2003); https://doi.org/10.1117/12.478584

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