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Proceedings Paper

Three-dimensional microscopic modifications in glasses by a femtosecond laser
Author(s): Kiyotaka Miura; Jianrong Qiu; Tsuneo Mitsuyu; Kazuyuki Hirao
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Paper Abstract

We examined the feasibility of making various microscopic modifications in glasses by ultra-short pulses. It was confirmed that permanent refractive index changes, photo- reduction of samarium ions, the phenomenon of long-lasting phosphorescence, and creation of microcrystals with second- order nonlinear optical functions can be produced with a femtosecond pulse laser only in selective internal areas in glasses. By using a femtosecond laser with a high repetition rate, permanent optical waveguides can be successfully written in various glasses, where refractive index changes are continuously induced along a path traversed by focal point. We also confirmed that only rare earth ions of the core region in the waveguides are reduced by the laser irradiation.

Paper Details

Date Published: 15 July 1999
PDF: 11 pages
Proc. SPIE 3618, Laser Applications in Microelectronic and Optoelectronic Manufacturing IV, (15 July 1999); doi: 10.1117/12.352678
Show Author Affiliations
Kiyotaka Miura, ERATO (Japan)
Jianrong Qiu, ERATO (Japan)
Tsuneo Mitsuyu, ERATO (Japan)
Kazuyuki Hirao, ERATO and Kyoto Univ. (Japan)

Published in SPIE Proceedings Vol. 3618:
Laser Applications in Microelectronic and Optoelectronic Manufacturing IV
Jan J. Dubowski; Henry Helvajian; Ernst-Wolfgang Kreutz; Koji Sugioka, Editor(s)

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