Annealing dynamics of waveguide Bragg gratings

Evidence of femtosecond laser induced colour centres

P. Dekker*, M. Ams, G. D. Marshall, D. J. Little, M. J. Withford

*Corresponding author for this work

Research output: Contribution to journalArticle

35 Citations (Scopus)
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There is still significant speculation regarding the nature of femtosecond laser induced index change in bulk glasses with colour centre formation and densification the main candidates. In the work presented here, we fabricated waveguide Bragg gratings in doped and undoped phosphate glasses and use these as a diagnostic for monitoring subtle changes in the induced refractive index during photo- and thermal annealing experiments. Reductions in grating strengths during such experiments were attributed to the annihilation of colour centres.

Original languageEnglish
Pages (from-to)3274-3283
Number of pages10
JournalOptics Express
Issue number4
Publication statusPublished - 15 Feb 2010

Bibliographical note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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