| 摘要 |
PROBLEM TO BE SOLVED: In an optical fiber transmission line under dispersion management, to suppress generation of four optical wave mixed light by setting parameters such as an optical fiber dispersion value, wavelength interval between signal lights. SOLUTION: In a wavelength-multiplexing optical fiber transmission system constituted by optical fiber transmission lines consisting of a combination of m pairs of optical fibers (m is a natural number 2 or more) each having secondary dispersion of mutually reversed positive and negative signs for periodically compensating so that their cumulative dispersion becomes zero, the signal light wavelength, the wavelength interval between the signal lights and the optical dispersion value are set such that (ΔβpLp+ΔβnLn)/2 does not coincide with an integer multiple of π, where the phase mismatch amount and the optical fiber length determined by the signal light wavelength, the wavelength interval between signal lights and the optical dispersion value are defined as Δβp, Lp for an optical fiber having a positive dispersion and Δβn, Ln for an optical fiber having a negative dispersion, respectively. |
