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

 
: Heck, M.; Schwartz, G.; Krämer, R.G.; Richter, D.; Goebel, T.A.; Matzdorf, C.; Tünnermann, A.; Nolte, S.

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Fulltext ()

Optics Express 27 (2019), No.4, pp.4292-4303
ISSN: 1094-4087
Deutsche Forschungsgemeinschaft DFG
GRK 2101/1
Bundesministerium fur Wirtschaft und Energie BMWi (Deutschland)
ZF4309603DF8
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
03Z1H534
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
13N13654
English
Journal Article, Electronic Publication
Fraunhofer IOF ()

Abstract
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.

: http://publica.fraunhofer.de/documents/N-549389.html