| 摘要 |
A task is to provide a wavelength division multiplexing optical fiber transmission line that reduces signal deterioration caused by dispersion even in a transmission system having a high-speed transmission rate, and is suited to a long-distance transmission. A dispersion management transmission line 2 is connected between optical repeaters 1 and 3. The dispersion management transmission line 2 has 4 pairs, of which each has a positive dispersion fiber and a negative dispersion fiber, connected in series. Dispersion compensation is made step by step over 4 times for dispersion and a dispersive slope, which were accumulated by the front-stage positive dispersion fiber, by the next-stage negative dispersion fiber.
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