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Stress relief : proof of the mechanism of photo-induced index change

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Abstract

It is demonstrated, for the first time, that stress-relief is responsible for the photo-induced index changes in optical fibres. This mechanism is a consequence of the breakage of wrong-bonds in the glass network through single- or multi-photo absorption, which allows relaxation of the stresses. The index changes through the stress-optic effect.

© 1992 Optical Society of America

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