| 摘要 |
PROBLEM TO BE SOLVED: To increase an optical fiber length and the number on the side of reception by improving a beam splitting loss. SOLUTION: At a transmission terminal 10, an electric signal impressed to an input terminal 11 becomes the optical signal of any one of optical wavelengths λ1, λ2, λ3... through an electric/optic converter 10 corresponding to the set values λ1, λ2, λ3... of a wavelength control means 13 and is inputted from an optical fiber 21 to a wavelength selective filter 26 and here, the optical signal of the optical wavelength λ1 is selected and inputted from an optical fiber 22 to a reception terminal 30-1. Afterwards, the optical signal of the optical wavelength λ2 is inputted to a reception terminal 30-2 and the optical signal of the optical wavelength λ3 is inputted to a reception terminal 30-3 similarly. |
