Abstract
We report 40 Gbit/s soliton transmission field experiments over 1, 000 km in the Tokyo metropolitan optical loop network. The network consists of dispersion-shifted fibers. We employed a dispersion compensation technique to keep the average dispersion at a small constant value of 0.05 ps/km/nm and this resulted in an error-free 5 ps soliton data transmission over 1, 000 km. When in-line synchronous modulation was employed at 680 km, the transmission distance was extended to 1, 360 km.
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