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

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.
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Journal articles
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https://hal-utt.archives-ouvertes.fr/hal-02311129
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Submitted on : Thursday, October 10, 2019 - 4:33:19 PM
Last modification on : Friday, October 11, 2019 - 1:31:03 AM

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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, 2009, 17 (9), pp.6939. ⟨10.1364/OE.17.006939⟩. ⟨hal-02311129⟩

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