Integrated optical filters utilizing resonators
AssigneeLambda Crossing Ltd.
InventorsJacob Scheuer, Moti Margalit, Daphna Bortman-Arbiv
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Abstract
A filtering method and optical filter structure are presented. The structure comprises an input waveguide, an output waveguide, and a filter stage formed by at least one closed loop resonator optically coupled to the input and output waveguides. A level of the coupling from each of the waveguides to the resonator is at least 5 times greater than a loss-per-revolution of the resonator. The filter structure thus provides for reducing a bandwidth and insertion loss while filtering at least one optical channel from a multi-channel light signal.
Claims4
A method for reducing a bandwidth and insertion loss while filtering at least one optical channel from a multichannel light signal, the method comprising passing the light signal through an input waveguide of an optical filter structure, that comprises at least two closed loop resonators optically coupled to said input waveguide and at least one output waveguide and to each other, wherein a level of the coupling from the waveguide to the resonator is at least 5 times greater than a loss-per-revolution of the resonator and a ratio between the largest free spectral range and a bandwidth of the filter structure substantially does not exceed 30.
Dependencies are inferred from the claim text.