We have computed the contribution of UV-light-induced densification to the refractive-index modulation of fiber Bragg gratings. Our results confirm that, for strong gratings written in Ge-doped silica fibers with 248-nm UV light, density changes account for a major part of the photosensitivity effect.
© 2000 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(060.2400) Fiber optics and optical communications : Fiber properties
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(230.1480) Optical devices : Bragg reflectors
A. I. Gusarov and D. B. Doyle, "Contribution of photoinduced densification to refractive-index modulation in Bragg gratings written in Ge-doped silica fibers," Opt. Lett. 25, 872-874 (2000)