The Furukawa Electric Co., Ltd.

Haruki Urabe

Kazutaka Nara

Masahito Morimoto

Tsunetoshi Saitoh

Two Mach-Zehnder optical interferometer circuits are accurately point-symmetrically connected to each other to form a first point-symmetrically connected optical interferometer circuit constituting a light input side circuit. Optical signals having a plurality of wavelengths are input to a light input terminal. A second point-symmetrically connected optical interferometer circuit having the same functional structure as the first point-symmetrically connected optical interferometer circuit is connected to a through port, which is an output terminal of the light input side circuit, as a first light output side circuit. A cross port, which is the other output terminal of the light input side circuit, is connected to a second light output side circuit having at least one of Mach-Zehnder optical interferometer circuits whose transmittance characteristics are different from those of the Mach-Zehnder optical interferometer circuits.

Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing function

Two Mach-Zehnder optical interferometer circuitsandare accurately point-symmetrically connected to each other to form a first point-symmetrically connected optical interferometer circuitconstituting a light input side circuit. Optical signals having a plurality of wavelengths are input to a light input terminal. A second point-symmetrically connected optical interferometer circuithaving the same functional structure as the first point-symmetrically connected optical interferometer circuitis connected to a through port, which is an output terminal of the light input side circuit, as a first light output side circuit. A cross port, which is the other output terminal of the light input side circuit, is connected to a second light output side circuithaving at least one of Mach-Zehnder optical interferometer circuitsandwhose transmittance characteristics are different from those of the Mach-Zehnder optical interferometer circuitsand

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Tokyo, Japan

Haruki Urabe