Patent ID: 7224859

Claim:
An opto-electronic integrated circuit device comprising: an optical switch disposed in an input port of a first input/output port over a substrate, and changing over an optical path of an optical signal inputted from the input port and outputting the optical signal from any one of a plurality of output terminals; an opto-electric conversion element optically connected to one of the plural output terminals of the optical switch, and converting the optical signal outputted from said one output terminal of the optical switch to an electric signal and inputting the converted electric signal into a semiconductor element mounted over the substrate; an optical waveguide optically connected to another of the plural output terminals of the optical switch and outputting the optical signal outputted from said another output terminal of the optical switch through an output port of a second input/output port over the substrate; and a control part for controlling the optical switch to chance over the optical path of the optical signal, wherein the control part judges whether or not to permit the input of an optical signal to the input port of the first input/output port and outputs an electric signal indicating permission or prohibition of the input of the optical signal through the first input/output port.