Optical waveguides – Integrated optical circuit
Reexamination Certificate
2005-03-22
2005-03-22
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
Integrated optical circuit
C385S002000, C385S003000
Reexamination Certificate
active
06870979
ABSTRACT:
An optical circuit device includes: a substrate and an optical waveguide layer having a core and a cladding formed on the substrate; an optical waveguide circuit of the core having an optical splitter for splitting light, an optical coupler for coupling light, a first connecting optical waveguide and a second connecting optical waveguide for connecting the optical splitter and the optical coupler, and the first and second connecting optical waveguides respectively having first and second phase adjustment means capable of varying the phases of a propagating light, the optical circuit device being formed such that the rate of change of the polarization difference of phases in the first phase adjustment means and the rate of change of the polarization difference of phases in the second phase adjustment means are different from each other with respect to the phase adjustment amounts when the first and second phase adjustment means perform phase adjustment.
REFERENCES:
patent: 5117470 (1992-05-01), Inoue et al.
patent: 5940548 (1999-08-01), Yamada et al.
patent: 6580862 (2003-06-01), Kominato et al.
Kawashima Hiroshi
Nara Kazutaka
Doan Jennifer
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
The Furukawa Electric Co. Ltd
Ullah Akm Enayet
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