Optical waveguides – With optical coupler
Reexamination Certificate
2005-01-25
2008-12-23
Wong, Tina M (Department: 2874)
Optical waveguides
With optical coupler
C385S014000, C385S024000
Reexamination Certificate
active
07469079
ABSTRACT:
Two Mach-Zehnder optical interferometer circuits13aand13bare accurately point-symmetrically connected to each other to form a first point-symmetrically connected optical interferometer circuit5constituting a light input side circuit1. Optical signals having a plurality of wavelengths are input to a light input terminal17. A second point-symmetrically connected optical interferometer circuit7having the same functional structure as the first point-symmetrically connected optical interferometer circuit5is connected to a through port18, which is an output terminal of the light input side circuit1, as a first light output side circuit2. A cross port19, which is the other output terminal of the light input side circuit1, is connected to a second light output side circuit3having at least one of Mach-Zehnder optical interferometer circuits13cand13dwhose transmittance characteristics are different from those of the Mach-Zehnder optical interferometer circuits13aand13b.
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Hida, Yasuhiro et al., The IEICE Trasactions C-I, vol. J80-C-I, No. 11, p. 517-524, Nov. 1997 (with partial English translation).
Nara, Kazutaka et al., Proceedings of the 2004 IEICE Electronics Society Conference 1, Sep. 8, 2004, p. 174 (with partial English translation).
Morimoto Masahito
Nara Kazutaka
Saitoh Tsunetoshi
Urabe Haruki
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
The Furukawa Electric Co. Ltd.
Wong Tina M
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