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In this paper, the performance of a two-port single-mode fiber-silicon wire waveguide coupler module which utilizes an identical spot-size converter (SSC) at the input and output ports is reported. Each of the silicon (Si)-based SSCs comprised cascaded horizontal linear and vertical nonlinear up-tapers measured 300 and 200 mum in length, respectively, in a common silicon-on-insulator (SOI) substrate...
The performance of a single-mode fiber-silicon wire waveguide coupler module which utilizes an identical spot-size converter (SSC) at the input and output ports is reported. The structural parameters of the SSCs were designed for compactness and relaxed tolerance to fabrication errors.
A lensed fiber with a convex-piano silicon microlens is proposed for butt-coupling between standard single-mode fibers and high-index contrast waveguides with fine mode-field diameters. The theoretical focused spot diameter is 0.56 mum at the wavelength 1.55 mum.
Theoretical and experimental performances of a robust spot-size converter (SSC) for efficient coupling between a single-mode fiber and a silicon wire waveguide are presented. The SSC comprised of cascaded horizontal and nonlinear vertical up-tapers.
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