Open AccessControl of directional evanescent coupling in fs laser written waveguides
Author(s) -
Alexander Szameit,
Felix Dreisow,
Thomas Pertsch,
Stefan Nolte,
Andreas Tünnermann
Publication year - 2007
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.15.001579
Subject(s) - optics , coupling (piping) , femtosecond , waveguide , laser , diagonal , coupled mode theory , physics , materials science , refractive index , geometry , metallurgy , mathematics
We investigate the evanescent coupling of femtosecond laser written waveguides with elliptical and circular shape. A directional tuning the coupling properties is realized in a cubic array by tilting the elliptical waveguides. This allows to specifically pronounce diagonal coupling. In contrast, directional insensitive coupling is demonstrated in a circular waveguide array based on circular waveguides.