Optical loss mechanisms in femtosecond laser-written point-by-point fibre Bragg gratings

Mattias L. Åslund, Nemanja Jovanovic, Nathaniel Groothoff, John Canning, Graham D. Marshall, Stuart D. Jackson, Alexander Fuerbach, Michael J. Withford

Research output: Contribution to journalArticle

43 Citations (Scopus)
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Fibre Bragg gratings inscribed with the point-by-point method using a Ti-sapphire femtosecond laser operating at 800 nm are shown to display strong increasing attenuation towards shorter wavelengths with a large and spectrally sharp recovery observed below 400 nm. The origin of this loss is shown to be Mie scattering, and the sharp recovery in the transmission results from wavelength dependent scattering within the numerical aperture of the core. The permanent losses from these Type II gratings have implications for high temperature sensors and fibre lasers.

Original languageEnglish
Pages (from-to)14248-14254
Number of pages7
JournalOptics Express
Issue number18
Publication statusPublished - 1 Sep 2008

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: [http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-18-14248]. 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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