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Proceedings Paper

Silica glass for photonics
Author(s): Akira J. Ikushima; Hiroshi Kakiuchida; Kazuya Saito
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Paper Abstract

Recent studies on silica glass as a photonic material will be described. With regard to the structural disorder, investigations have been made to improve transparency and to shift the optical absorption edge in the ultraviolet towards shorter wavelengths. Remarkable advances have been achieved in the understanding of both light scattering, which is a dominant factor in the optical losses in silica fibers, and the absorption edge. Freezing of the structural disorder was observed, and structural relaxations are found to be important for improving the transparency, whereas for the absorption edge thermal vibration effects seem to be more predominant than the structural disorder. From the results, the present authors have tried to control the structural relaxation for developing silica glass with an ultimate optical transparency, finding that a very tiny amount of the proper impurity species gives rise to structural subrelaxations, which are effective in reducing the Rayleigh scattering. The scattering was reduced by 13% by addition of only 10 wt.ppm Na2O, for example.

Paper Details

Date Published: 8 August 2001
PDF: 6 pages
Proc. SPIE 4513, Optoelectronic Information Systems and Processing, (8 August 2001); doi: 10.1117/12.435878
Show Author Affiliations
Akira J. Ikushima, Toyota Technological Institute (Japan)
Hiroshi Kakiuchida, Toyota Technological Institute (Japan)
Kazuya Saito, Toyota Technological Institute (Japan)


Published in SPIE Proceedings Vol. 4513:
Optoelectronic Information Systems and Processing

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