Title :
A study of UV photosensitivity in germanosilicate preforms and fibres
Author :
Dong, L. ; Archambault, J.-L. ; Reekie, L. ; Russell, P.St.J.
Author_Institution :
Southampton Univ., UK
Abstract :
We have studied the dynamics of the absorption changes in germanosilicate preforms and have also simulated the index change growth in fibre gratings. It is found that the index modulation for the first order Bragg gratings can only reach 20% of the maximum index change at F=-2F0 and decreases for longer exposure times. The measured maximum refractive index changes in several different germanosilicate fibres fits well with the maximum refractive index changes predicted from the UV absorption change assuming total bleach of the 242 nm band
Keywords :
diffraction gratings; germanium compounds; optical fibres; optical saturable absorption; refractive index; silicon compounds; 242 nm; GeO2-SiO2; UV absorption change; UV photosensitivity; absorption changes; bleaching; fibre grating; fibres; first order Bragg gratings; germanosilicate preforms; index change growth; index modulation; refractive index;
Conference_Titel :
Optical Fibre Gratings and Their Applications, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19950080
