Demonstration of a 3-dB directional coupler with enhanced robustness to gap variations for silicon wire waveguides | Zendy

Guangwei Cong | Zendy; Keijiro Suzuki | Zendy; Sun-Kak Kim | Zendy; Ken Tanizawa | Zendy; Shu Namiki | Zendy; Hitoshi Kawashima | Zendy

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Demonstration of a 3-dB directional coupler with enhanced robustness to gap variations for silicon wire waveguides

Author(s) -

Guangwei Cong,

Keijiro Suzuki,

Sun-Kak Kim,

Ken Tanizawa,

Shu Namiki,

Hitoshi Kawashima

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.22.002051

Subject(s) - optics , power dividers and directional couplers , robustness (evolution) , silicon , materials science , waveguide , refractive index , hybrid coupler , integrated optics , optoelectronics , physics , biochemistry , chemistry , gene

We demonstrate a robust 3-dB directional coupler which has a narrow silicon wire core and a wide gap. Sensitivity to the gap variation is decreased to one tenth that of a conventional directional coupler. Better spectral stability due to the enhanced robustness to waveguide geometrical fluctuations was experimentally verified.

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