Patent ID: 7257282

Claim:
An information transmission process for transmitting information between a signal-emitting port for emitting an optical signal and plural signal-receiving ports for receiving the optical signal through a light transmissive medium in an optical circuit device, the process comprising: a first step of transmitting a first information by emitting light in a first emission angle range from the signal-emitting port to transmit first information to at least one of the signal-receiving ports; and a second step, after the first step, of transmitting second information from the signal-emitting port by emitting light in a second emission angle range different from the first emission angle range to transmit second information to at least one of the signal-receiving ports, wherein, in the first step, a communication path is established between the signal-emitting port and at least one signal-receiving port, and subsequently in the second step, data is transmitted through the communication path.