Interferometric measurement of refractive-index change in photosensitive glass
Tasshi Dennis, E. M. Gill, Sarah L. Gilbert
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 x 10-5 Our technique was found to he insensitive to the effects of photodarkening and material compaction.
, Gill, E.
and Gilbert, S.
Interferometric measurement of refractive-index change in photosensitive glass, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=4945
(Accessed June 1, 2023)