| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical transmission system having economical efficiency and suitable for multiplex services in a user system. <P>SOLUTION: Transmission systems 101 to 104 generate signal light with a single mode in wavelength of 1.2 μm or small. Each of systems 101 to 104 generates optical light in different bands to carry out information transmission by using the generated optical signal. In an optical multiplexer 300, optical fibers 201 to 204 are stored optically, and each optical signal transmitted through these fibers is multiplexed by wavelength division multiplex technology and transmitted to an optical demultiplexer 500 through an optical fiber 400. In the optical demultiplexer 500, the multiplexed optical signal transmitted from optical multiplexer 300 through the optical fiber 400 is separated in frequencies for each wavelength band and fed as an output to each optical receiving device 701 to 704, which has a corresponding band. In the optical receiving devices 701 to 704, each optical signal entered through the optical fiber 601 to 604 is converted to an electrical signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
