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Proceedings Paper

Kramers-Kronig analysis of the absorption change in fiber gratings
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Paper Abstract

We apply a Kramers-Kronig model to several published experimental studies of photosensitivity in Ge-doped silica to calculate the predicted index change (Delta) nKK from the measured change in the absorption spectrum. In most cases (Delta) nKK is close to the measured index change (Delta) nexp. Most of (Delta) nKK arises from absorption changes between 165 and approximately 195 nm. In the few cases where (Delta) nKK is much smaller than (Delta) nexp, the absorption spectrum was not measured below 200 nm, which is probably the reason for the discrepancy. Based on several observations, we also make the hypothesis that in the majority of our study population, color centers are probably responsible for most of the observed absorption change, and thus of the index change.

Paper Details

Date Published: 20 November 1996
PDF: 12 pages
Proc. SPIE 2841, Doped Fiber Devices, (20 November 1996); doi: 10.1117/12.258964
Show Author Affiliations
Michel J. F. Digonnet, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 2841:
Doped Fiber Devices
Michel J. F. Digonnet; Francois Ouellette, Editor(s)

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