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Proceedings Paper

Internal modification of glass materials with a femtosecond laser
Author(s): Kazuyuki Hirao
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Paper Abstract

The various microscopic modifications in glasses by ultra- short pulses were examined. It was confirmed that permanent refractive index changes, and creation of microcrystals with second-order nonlinear optical functions could be produced with a femtosecond pulse laser only in selective internal areas in glasses. By using a femtosecond laser with a high repetition rater, 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 single crystals are created from the core region in the waveguides by the laser irradiation, which is used for various kinds of optical devices.

Paper Details

Date Published: 6 November 2000
PDF: 7 pages
Proc. SPIE 4088, First International Symposium on Laser Precision Microfabrication, (6 November 2000); doi: 10.1117/12.405739
Show Author Affiliations
Kazuyuki Hirao, ERATO/Japan Science and Technology Corp. and Kyoto Univ. (Japan)


Published in SPIE Proceedings Vol. 4088:
First International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Koji Sugioka; Thomas W. Sigmon, Editor(s)

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