Title :
Hydroxyl concentration profile in low-loss graded-index fibres
Author :
Heitmann, W. ; Wittmann, M.
Author_Institution :
Deutsche Bundespost, Forschungsinstitut, Darmstadt, West Germany
Abstract :
Low OH-contamination in graded-index fibres was achieved by thin barrier layers of fluorine-doped silica and by chlorine drying in the preform collapse phase. A maximum of OH-concentration was found in the fibre core centre. Attenuation values of about 0.30 dB/km were measured between 1550 nm and 1600 nm.
Keywords :
fluorine; optical fibres; silicon compounds; OH-contamination; SiO2:F; attenuation values; chlorine drying; concentration profile; fibre core centre; low-loss graded-index fibres; preform collapse phase; thin barrier layers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19830384
