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We experimentally demonstrate a second-order optical filter using a novel self-coupled optical waveguide (SCOW) resonance structure. The rejection band profile can be conveniently tailored by two pairs of phase shifters.
We propose and experimentally demonstrate a fiber-to-slot-waveguide grating coupler based on a double-strip waveguide, together with a double-strip-to-slot waveguide mode converter. By employing the double-strip waveguide, we improve the coupling efficiency from a fiber to the slot waveguide by , compared with previous grating-based two-stage schemes. In addition, the double-strip-to-slot...
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