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Drawing- or Radiation-Induced Paramagnetic Defects Associated with Ge in SiO2:GeO2 Optical Fiber

Published online by Cambridge University Press:  25 February 2011

H. Kawazoe ,
Y. Watanabe ,
K. Shibuya  and
K. Muta
H. Kawazoe
Affiliation:
Tokyo Institute of Technology, Dept. of Inorganic Materials, Ohokayama, Meguro-ku, Tokyo 152
Y. Watanabe
Affiliation:
Tokyo Institute of Technology, Dept. of Inorganic Materials, Ohokayama, Meguro-ku, Tokyo 152
K. Shibuya
Affiliation:
Showa Electric Wire and Cable Co., Ltd., Minamihashimoto, Sagamihara-shi 229, Japan
K. Muta
Affiliation:
Showa Electric Wire and Cable Co., Ltd., Minamihashimoto, Sagamihara-shi 229, Japan
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Abstract

ESR hyperfine structure produced by 73Ge of the drawing induced center in 10GeO2:90SiO2 or 30GeO2:70SiO2 fibers was detected and analyzed by taking into account site to site fluctuation in the glasses. The current assignment of the center to Ge-E′ in which an unpaired spin occupies one of sp3 hybrids of Ge was confirmed by the observation. The stress assisted radical cleavage of Ge-O bond was proposed to explain the enhancement of Ge-E′ formation in the fibers under quenching process. The hyperfine structure of the Y-induced center was also detected and similarly analyzed. New model structure was proposed for γ-induced center in which an electron is trapped on a Ge atom having four oxygen neighbors.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 61: Symposium P – Defects in Glasses , 1985 , 349
Copyright
Copyright © Materials Research Society 1986

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References

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