Light coupling between a singlemode- multimode-singlemode (SMS) fiber structure and a long period fiber grating

Qiang Wu, Yuliya Semenova, Youqiao Ma, Pengfei Wang, Tuan Guo, Long Jin, Gerald Farrell

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We propose a novel optical coupling technique based on evanescent fieldcoupling between a singlemode- multimode-singlemode (SMS) fiber structureand a long period fiber grating (LPFG). By parallel placement of the two fibersections in close proximity to each other, the excited multi-cladding modesfrom the SMS fiber section can be selectively coupled to the guided mode inthe LPFG, and vice versa. A theoretical analysis based for such a structureis undertaken and the simulated results are verified by experiments demonstratinga maximum coupling efficiency of up to 1.66\% (which could be improved to 27.5\%in theory) over a broadband resonance (42 nm with a 3 dB bandwidth).
Original languageEnglish
Pages (from-to)3683-3688
JournalJournal of Lightwave Technology
Volume29
Issue number24
Publication statusPublished - Dec 2011

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