Open AccessA micro-structured aperture made of a hollow triangular-core fiber for novel beam shaping
Author(s) -
Woosung Ha,
Se-Jin Lee,
Jongki Kim,
Youchul Jeong,
Kyunghwan Oh,
Jens Kobelke,
Kay Schuster,
Sonja Unger,
Anka Schwuchow,
Jun Ki Kim
Publication year - 2010
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.18.020918
Subject(s) - optics , cladding (metalworking) , materials science , numerical aperture , optical fiber , diffraction , core (optical fiber) , beam propagation method , beam (structure) , photonic crystal fiber , refractive index , physics , wavelength , metallurgy
We demonstrate a micro-structured aperture made of a unique hollow triangular-core fiber (HTCF) that consists of a central air hole, a high-index hollow triangular core, and silica cladding for all-fiber novel beam shaping. Detailed fabrication processes to embed a hollow triangular structure into a cylindrical optical fiber are described and unique diffraction patterns out of the HTCF for monochromatic light are analyzed both experimentally and theoretically. Fourier-optic analysis combined with guided mode calculation was pursued to interpret experimental patterns in terms of the beam propagation distance.