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Proceedings Paper

Photosensitive changes in Ge-doped fibres observed by raman spectroscopy
Author(s): Daniel McStay
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Paper Abstract

Raman spectroscopy has been used to study photosensitive effects in Ge-doped optical fibres. The spectrum obtained for a sample of the original fibre used by Hill et al is shown to have a large broadband fluorescence. A rapid photobleaching of a fluorescence band at 570nm has been observed in the photosensitive fibre. It is shown that the Ge(1) and Ge(2) defects have appropriate properties to produce a refractive index grating via a photobleaching process. A weak photosensitive production of SiH occurs in Ge-doped fibres subjected to 488nm, which have previously been subjected to hydrogen diffusion, the rate of production is found to be linear with the power squared.

Paper Details

Date Published: 1 September 1990
PDF: 11 pages
Proc. SPIE 1314, Fibre Optics '90, (1 September 1990); doi: 10.1117/12.21983
Show Author Affiliations
Daniel McStay, King's College London (United Kingdom)

Published in SPIE Proceedings Vol. 1314:
Fibre Optics '90

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