Photosensitive changes in Ge-doped fibres observed by raman spectroscopy

Daniel McStay

doi:10.1117/12.21983

1 September 1990 Photosensitive changes in Ge-doped fibres observed by raman spectroscopy

Daniel McStay

Proceedings Volume 1314, Fibre Optics '90; (1990) https://doi.org/10.1117/12.21983
Event: Fibre Optics '90, 1990, London, United Kingdom

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.

Citation Download Citation

Daniel McStay "Photosensitive changes in Ge-doped fibres observed by raman spectroscopy", Proc. SPIE 1314, Fibre Optics '90, (1 September 1990); https://doi.org/10.1117/12.21983

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