Optical signal transmission with thermooptically controlled optical switching

摘要

The optical signal transmission system includes one or more optical wave guide switches (11 to 15) for switching between transmission paths for transmission of light signals and an optical level adjusting device (16 to 24) connected with the one or more optical wave guide switches in at least one of the transmission paths. The optical level adjusting device (16 to 24) controls its own light transmittance with a thermooptic device (22,24) and the one or more optical wave guide switches (11 to 15) switch between transmission paths by a similar thermooptic device (14,15). The one or more optical wave guide switches and the optical level adjusting device are arranged in an integrated thermooptic circuit in a common substrate.