Optical waveguides – Integrated optical circuit
Reexamination Certificate
2006-01-31
2006-01-31
Font, Frank G. (Department: 2883)
Optical waveguides
Integrated optical circuit
C385S031000, C385S039000, C385S042000, C385S045000, C385S047000
Reexamination Certificate
active
06993213
ABSTRACT:
Substantially S-shaped optical waveguides are embedded in a semiconductor substrate, and at least two optical waveguide returning parts are interposed between the input and output ends of the waveguides. Each of the optical waveguide returning parts includes a multiplexing portion. A reflecting part is located on a rear end side of the multiplexing portion of each optical waveguide returning part. Thus, the length between input and output ends of the waveguides can be reduced, suppressing bending loss, and achieving a high speed and small size integrated optical device.
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P.V. Studenkov et al., “Monolithic Integration of an All-Optical Mach-Zehnder Demultiplexer Using an Asymmetric Twin-Waveguide Structure,” Jun. 2001, pp. 600-602, vol. 13(6),IEEE Photonics Technology Letters.
Dupuis Derek L.
Font Frank G.
Leydig , Voit & Mayer, Ltd.
Mitsubishi Denki & Kabushiki Kaisha
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