Patent ID: 7720389

Claim:
An optical integrated circuit device comprising: a light transmission member for transmitting light, the light transmission member being in the form of a flat plate; an optical waveguide propagating light emitted from a light source; and a plurality of light transmission/reception units transmitting/receiving a signal to/from each other by sharing the light transmission member for use as a light transmission path; wherein each of the plurality of light transmission/reception units includes: a first optical resonance member formed into the shape of a ring and disposed, in the proximity of the light transmission member and substantially parallel thereto, between the light transmission member and the optical waveguide, the first optical resonance member resonating with light propagating through the optical waveguide when either of a voltage or a magnetic field is applied; an optical emission member formed into the same shape as that of the first optical resonance member and disposed between the light transmission member and the first optical resonance member in a manner where contact is made with the first optical resonance member, the optical emission member guiding, to the light transmission member, resonant light propagating through the first optical resonance member; a second optical resonance member formed into the shape of a ring and disposed in the proximity of the light transmission member and substantially parallel thereto, the second optical resonance member resonating with light propagating through the light transmission member when either of the voltage or the magnetic field is applied; an optical reception member disposed between the light transmission member and the second optical resonance member in a manner where contact is made with the second optical resonance member, the optical reception member guiding, to the second optical resonance member, light propagating through the light transmission member; and an optical detection unit detecting resonant light propagating through the second optical resonance member.