Patent ID: 7630643

Claim:
A multimode optical transmission system for converting electrical signals into optical signals and performing multimode optical transmission of the optical signals, the multimode optical transmission system comprising: a plurality of light sources for converting a plurality of electrical signals into a plurality of optical signals having different wavelengths corresponding to the plurality of electrical signals, and outputting the plurality of optical signals; a wavelength multiplexing section for multiplexing the plurality of optical signals outputted from the plurality of light sources and outputting a wavelength multiplexed signal; a multimode optical transmission path for optically transmitting, in multimode, the wavelength multiplexed signal outputted from the wavelength multiplexing section; a plurality of optical signal extraction sections for extracting, from the wavelength multiplexed signal transmitted on the multimode optical transmission path, a plurality of optical signals, corresponding to the plurality of optical signal extraction sections, wherein each of the plurality of optical signals has a mode with a particular wavelength and a particular propagation constant; and a plurality of optical receiving sections for receiving the plurality of optical signals extracted by the plurality of optical signal extraction sections and converting the plurality of optical signals into a corresponding plurality of electrical signals, wherein a wavelength of each of the plurality of optical signals outputted from the plurality of light sources is set such that a propagation constant of a fundamental mode of an optical signal, having a particular wavelength, outputted from each of the plurality of light sources is different from a propagation constant of a high order mode of an optical signal, having a different wavelength, outputted from any other of the plurality of light sources.