Cladding mode coupling in highly localized fiber Bragg gratings II

complete vectorial analysis

Jens U. Thomas*, Nemanja Jovanovic, Ria G. Krämer, Graham D. Marshall, Michael J. Withford, Andreas Tünnermann, Stefan Nolte, Michael J. Steel

*Corresponding author for this work

Research output: Contribution to journalArticle

37 Citations (Scopus)


Highly localized fiber Bragg gratings can be inscribed point-by-point with focused ultrashort pulses. The transverse localization of the resonant grating causes strong coupling to cladding modes of high azimuthal and radial order. In this paper, we show how the reflected cladding modes can be fully analyzed, taking their vectorial nature, orientation and degeneracies into account. The observed modes' polarization and intensity distributions are directly tied to the dispersive properties and show abrupt transitions in nature, strongly correlated with changes in the coupling strengths.

Original languageEnglish
Pages (from-to)21434-21449
Number of pages16
JournalOptics Express
Issue number19
Publication statusPublished - 10 Sep 2012

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