Femtosecond laser-written micro void FBG's offer control of core-cladding coupling. Careful placement of localized defects within the core cross section permits tailoring of the reflection into modes of higher azimuthal order.
© 2010 The Optical Society
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
J. U. Thomas, N. Jovanovic, G. D. Marshall, R. Becker, C. Voigtländer, M. Steel, M. J. Withford, S. Nolte, and A. Tünnermann, "Tailored Mode Coupling with Highly Localized Intracore Fiber Bragg Gratings," in Advanced Photonics & Renewable Energy, OSA Technical Digest (CD) (Optical Society of America, 2010), paper BThC6.