High-efficiency light coupling in a submicrometric silicon-on-insulator waveguide
- 1 November 2000
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 39 (31), 5773-5777
- https://doi.org/10.1364/ao.39.005773
Abstract
Light coupling into a sub-micrometer-thick waveguide is usually done through a grating coupler. Coupling efficiency is strongly enhanced by addition of a mirror above the grating. This new kind of coupler can be designed to achieve efficiencies as great as 80%. Numerical calculations for a high-angular-spread Gaussian incident beam are compared with experimental results obtained for a standard silicon-on-insulator waveguide.Keywords
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