Optical waveguides – Planar optical waveguide
Reexamination Certificate
2007-02-27
2007-02-27
Font, Frank G. (Department: 2883)
Optical waveguides
Planar optical waveguide
C385S004000, C385S008000, C385S009000, C385S032000
Reexamination Certificate
active
10540776
ABSTRACT:
The present invention aims to provide an electromagnetic wave frequency filter capable of transmitting an electromagnetic wave having a predetermined frequency between two waveguides with a high level of efficiency. This object is achieved by the following construction: A resonator15that resonates with the electromagnetic wave having the predetermined frequency is located between an input waveguide13and an output waveguide14and close to the two waveguides. The output waveguide14is designed so that it extends parallel to the input waveguide13within a predetermined section18located in proximity to the resonator15, and its distance from the input waveguide13in the other section is larger than that in the predetermined section18. This construction allows the electromagnetic wave having the predetermined frequency to be transmitted between the input waveguide13and the output waveguide14via the resonator15, while preventing the other electromagnetic waves having different frequencies from being transmitted between the input waveguide13and the output waveguide14outside of the predetermined section18. The present electromagnetic wave frequency filter can be preferably constructed using a two-dimensional photonic crystal.
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Asano Takashi
Noda Susumu
Takano Hitomichi
Agency of Industrial Science and Technology
El-Shammaa Mary
Font Frank G.
Matsushita Electric & Works Ltd.
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