4 January 2008 High efficiency fiber to waveguide optical coupler in silicon-on-insulator based slot waveguides
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Abstract
We propose a novel optical fiber-to-waveguide coupler for integrated optical circuits. The proper materials and structural parameters of the coupler, which is based on a slot waveguide, are carefully analyzed using a full-vectorial three dimensional mode solver. Because the effective refractive index of the mode in a silicon-on-insulator-based slot waveguide can be extremely close to that of the fiber, a highly efficient fiber-to-waveguide coupling application can be realized. For a TE-like mode, the calculated minimum mismatch loss is about 1.8dB at 1550nm, and the mode conversion loss can be less than 0.5dB. The discussion of the present state-of-the-art is also involved. The proposed coupler can be used in chip-to-chip communication.
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Yan Liu, Yan Liu, Shaowu Chen, Shaowu Chen, Jinzhong Yu, Jinzhong Yu, } "High efficiency fiber to waveguide optical coupler in silicon-on-insulator based slot waveguides", Proc. SPIE 6831, Nanophotonics, Nanostructure, and Nanometrology II, 68310R (4 January 2008); doi: 10.1117/12.758333; https://doi.org/10.1117/12.758333
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