Title :
Loss increase in deuterium-doped VAD fibres with heat treatment
Author :
Nakahara, Mizuki ; Ohmori, Yutaka ; Itoh, Hayato
Author_Institution :
NTT Ibaraki Electrical Communication Laboratory, Tokai, Japan
Abstract :
The origin of the increase in the intensity of OH bands with heat treatment has been investigated using deuterium-containing VAD fibres. Remarkable loss increases only in the absorption peaks due to the OH ions have been observed after 200¿500°C heat treatment applied to three kinds of fibre: drawn from a preform prepared by a D2-O2 flame, and OD-doped in the core and in the cladding. It was confirmed that the origin of the hydrogen causing the loss increase is not in the synthesised glass materials.
Keywords :
deuterium compounds; germanate glasses; heat treatment; losses; optical fibres; silicon compounds; 200°-500°C; D2-O2 flame preparation; H diffusion; OD cladding doping; OD core doping; OH bands intensity increase; OH ion absorption peak; OH loss increase; SiO2-GeO2-OD glass fibres; germanate glasses; heat treatment; loss increases; optical fibres; preform drawn fibre; vapour phase axial deposition;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840222
