Colorless directional coupler with dispersion engineered sub-wavelength structure.


Directional couplers are extensively used devices in integrated optics, but suffer from limited operational wavelength range. Here we use, for the first time, the dispersive properties of sub-wavelength gratings to achieve a fivefold enhancement in the operation bandwidth of a silicon-on-insulator directional coupler. This approach does not compromise the… (More)
DOI: 10.1364/OE.20.013470


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Citations per Year

Citation Velocity: 12

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