Open AccessSingle-mode chirally-coupled-core fibers with larger than 50µm diameter cores
Author(s) -
Xiuquan Ma,
Cheng Zhu,
I-Ning Hu,
Alex F. Kaplan,
Almantas Galvanauskas
Publication year - 2014
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.22.009206
Subject(s) - core (optical fiber) , optics , materials science , optical fiber , single mode optical fiber , broadband , photonic crystal fiber , hard clad silica optical fiber , graded index fiber , physics , fiber optic sensor
In this paper, we report an advance in increasing core size of effective single-mode chirally-coupled-core (CCC) Ge-doped and Yb-doped double-clad fibers into 55 µm to 60 µm range, and experimentally demonstrate their robust single-mode performance. Theoretical and numerical description of CCC fibers structures with multiple side cores and polygon-shaped central core is consistent with experimental results. Detailed experimental characterization of 55 µm-core CCC fibers based on spatially and spectrally resolved broadband measurements (S(2) technique) shows that modal performance of these large core fibers well exceeds that of standard 20 μm core step-index large mode area fibers.