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We show that the linearity of a silicon electro-optic modulator can be improved by optimizing the embedded diode structure. Optimized designs of silicon modulators can give 5.9 dB improvement in SFDR over conventional LiNbO3 modulators.
We describe a shallow-etched diffractive waveguide grating coupler which achieves efficient coupling between single-mode fiber and a silicon-on-insulator optical waveguide. By the appropriate choice of waveguide/grating thicknesses and varying the coupling strength of the grating coupler via tailoring its fill factor to optimize the mode matching, a coupling loss of only 1.2 dB was obtained for each...
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