Undoped fluoride glass slides have been exposed to pulsed 193-nm ultraviolet (UV) irradiation. Their absorption changes have been measured to evaluate UV-induced index changes using Kramers-Kronig relation. A layer-peeling polishing technique was applied to characterize the local UV-induced index change of highly absorbing glass. Index changes up to 1.75 x 10^-4 have been evaluated with this method in fluorozirco-aluminate glass. Fluoroaluminate and fluorozirconate glass showed only small index changes of about 2.0 x 10^-6 and 2.6 x 10^-6 at a wavelength of 1550 nm.
© 2005 IEEE
M. Zeller, T. Lasser, H. G. Limberger, and G. Mazé, "UV-Induced Index Changes in Undoped Fluoride Glass," J. Lightwave Technol. 23, 624- (2005)