An optical device, a communication system and method for the multiplexing and demultiplexing of an optical signal

摘要

An object of the present invention consists in providing a modes groups multiplex communication system and to fashion group to multiplexing and demultiplexing. An optical device has a main light wave conductor (10); a modes conversion of light waves conductor (40), the continuously to the main light wave conductor and is composed of a bent si - mmf - waveguide; a first optical waveguide (20), the continuously with the modes conversion of light waves conductor and is composed of an si - mmf - waveguide, which is in the bending direction of the modes conversion of light waves conductor; and a second optical fiber (30), which consists of an si - mmf - waveguide, and with a peripheral curved surface of the modes conversion of light waves conductor is connected to.