ESR study on loss increase of 500°C heat-treated Ge-doped optical fibres

10 November 1983

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 19 (23) , 1004-1006
https://doi.org/10.1049/el:19830682

Abstract

Spectral changes of ESR signals due to germanium associated Ge(3) centres were observed on heat-treated optical fibres and preforms. The defect centres essentially exist in as-drawn fibres, even if preforms have been oxidised prior to drawing. The 500°C heat treatment of Ge-doped fibres caused a remarkable decrease in the ESR intensity of Ge(3) centres, subsequently causing optical loss increase around the 1.39 μm wavelength.

Keywords

GE DOPING
DEFECT CENTRES
SILICA GLASS
1.39 MICRON WAVELENGTH
GERMANATE GLASSES
ELECTRON SPIN RESONANCE
PREFORMS
OPTICAL FIBRES
HEAT TREATMENT
OPTICAL LOSS
GE(3) CENTRES
ESR STUDY
SIO2-GEO2
500°C

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