Interferometric measurement of refractive-index change in photosensitive glass

Autor: Dennis, Tasshi, Gill, Erin M., Gilbert, Sarah L.
Zdroj: Applied Optics; April 2001, Vol. 40 Issue: 10 p1663-1667, 5p
Abstrakt: We report on a technique for determining the change in the refractive index of photosensitive glass. We have demonstrated our interferometer-based technique on fiber preform and bulk glass samples, achieving an optical-path-difference (OPD) repeatability of 0.2 nm. For the bulk glass sample we measured an OPD of 15.2 ± 3.0 nm, corresponding to an index change of 2.1 ± 0.7 × 10^-5. Our technique was found to be insensitive to the effects of photodarkening and material compaction.
Databáze: Supplemental Index