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Contribution of photoinduced densification to refractive-index modulation in Bragg gratings written in Ge-doped silica fibers

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Abstract

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

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