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

Chengxin Pang 1 Felice Gesuele 1 Aurélien Bruyant 1 Sylvain Blaize 1 Gilles Lerondel 1 Pascal Royer 1
1 LNIO - Laboratoire de Nanotechnologie et d'Instrumentation Optique
ICD - Institut Charles Delaunay
Abstract : 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.
Keywords : Coupling efficiency Diode lasers Numerical simulation Optical directional couplers Single mode fibers Waveguide modes
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Submitted on : Thursday, October 10, 2019 - 4:33:19 PM
Last modification on : Wednesday, September 15, 2021 - 3:03:30 PM

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Chengxin Pang, Felice Gesuele, Aurélien Bruyant, Sylvain Blaize, Gilles Lerondel, et al.. Enhanced light coupling in sub-wavelength single-mode silicon on insulator waveguides. Optics Express, Optical Society of America - OSA Publishing, 2009, 17 (9), pp.6939. ⟨10.1364/OE.17.006939⟩. ⟨hal-02311129⟩

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