Open AccessIn-line interferometer based on intermodal coupling of a multicore fiber
Author(s) -
Minseok Yoon,
Sang Bae Lee,
YoungGeun Han
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.018316
Subject(s) - interferometry , optics , tapering , coupling (piping) , core (optical fiber) , interference (communication) , materials science , optical fiber , physics , telecommunications , channel (broadcasting) , computer graphics (images) , computer science , metallurgy
An in-line interferometer based on the intermodal coupling of a multicore fiber (MCF) is proposed and experimentally demonstrated. The in-line interferometer is fabricated by adiabatically tapering the MCF. The intermodal coupling of the in-line interferometer is strongly affected by the waist diameter of the MCF, which changes the evanescent field and the pitch size. The effect of the waist diameters of the MCF on the intermodal coupling in the in-line interferometer is theoretically and experimentally investigated. The transmission oscillations of the multiple core modes resulting from the intermodal coupling and interference substantially become stronger as the waist diameter decreases. The extinction ratio and the oscillation periodicity of the transmissions oscillations are changed by the waist diameter.