Control of higher-order cladding mode excitation with tailored femtosecond-written long period fiber gratings

We report on the detailed investigation of the core to cladding mode coupling in femtosecond-written long period fiber gratings (LPFG). It is shown that the excitation of higher-order cladding modes with strong selectivity and high precision is possible. The coupling behavior of several gratings, as...

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Bibliographic Details
Published in:Optics express 2019-02, Vol.27 (4), p.4292-4303
Main Authors: Heck, Maximilian, Schwartz, Georg, Krämer, Ria G, Richter, Daniel, Goebel, Thorsten A, Matzdorf, Christian, Tünnermann, Andreas, Nolte, Stefan
Format: Article
Language:English
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Summary:We report on the detailed investigation of the core to cladding mode coupling in femtosecond-written long period fiber gratings (LPFG). It is shown that the excitation of higher-order cladding modes with strong selectivity and high precision is possible. The coupling behavior of several gratings, as well as its dependence on the modified core cross-section, is determined theoretically and confirmed experimentally by its spectral response. The presented tool paves the way for a completely new class of tailored LPFGs for different fiber integrated devices.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.004292