Enhanced light coupling in sub-wavelength single-mode silicon on insulator waveguides | Zendy

Chengxin Pang | Zendy; Felice Gesuele | Zendy; Aurélien Bruyant | Zendy; Sylvain Blaize | Zendy; Gilles Lérondel | Zendy; Pascal Royer | Zendy

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Enhanced light coupling in sub-wavelength single-mode silicon on insulator waveguides

Author(s) -

Chengxin Pang,

Felice Gesuele,

Aurélien Bruyant,

Sylvain Blaize,

Gilles Lérondel,

Pascal Royer

Publication year - 2009

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.17.006939

Subject(s) - optics , materials science , finite difference time domain method , curvature , coupling (piping) , radius of curvature , silicon on insulator , single mode optical fiber , wavelength , silicon , coupled mode theory , mode coupling , optoelectronics , waveguide , coupling loss , optical fiber , refractive index , physics , mean curvature , geometry , mathematics , mean curvature flow , metallurgy

We report on NIR efficient end-coupling in single-mode silicon on insulator waveguides. Efficient coupling has been achieved using Polymer-Tipped Optical Fibers (PTOF) of adaptable radius of curvature (ROC). When compared with commercial micro lenses, systematic studies as a function of PTOF ROC, lead for subwavelength PTOF to a coupling factor enhancement as high as 2.5. This experimental behavior is clearly corroborated by radial FDTD simulations and an absolute coupling efficiency of about 50% is also estimated.

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