Open AccessDesign of resonance grating coupler
Author(s) -
Shogo Ura,
Shunsuke Murata,
Yasuhiro Awatsuji,
Kenji Kintaka
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.012207
Subject(s) - optics , grating , aperture (computer memory) , coupled mode theory , guided mode resonance , hybrid coupler , reflection (computer programming) , output coupler , fiber bragg grating , waveguide , materials science , coupling (piping) , resonance (particle physics) , diffraction grating , physics , power dividers and directional couplers , refractive index , optical fiber , laser , acoustics , particle physics , computer science , metallurgy , programming language
A new integrated-optic coupler was proposed for coupling a guided wave to a free-space wave propagating vertically from the waveguide surface. The coupler consists of a grating coupler in a cavity formed by two distributed Bragg reflectors, and has a small aperture. The cavity was designed to eliminate both transmission and reflection of the incident guided wave, resulting in 100% radiation by a several-micron aperture. Design consideration was theoretically discussed based on the coupled mode analysis. Predicted performance was simulated and confirmed by the finite difference time domain method.