Differences between dispersion compensation for G.652 and G.655 fibers in the 10G system of the OptiX OSN 6800

The typical dispersion coefficient of G.652 single-mode long wavelength optical fibers (SMF) is 17 ps/nm.km (the value in actual use is 20 ps/nm.km). Generally, the dispersion coefficient of a single span exceeds 40 km. Therefore, dispersion compensation is required. The typical dispersion coefficient of G.655 single-mode long wavelength optical fibers is 4.5 ps/nm.km (the value in actual use is 6 ps/nm.km), which is transmitted in G.655 fibers. The dispersion-limited distance is 800/6 = 130 km. (Note: The dispersion limit is 700/6 = 115 km in China). Dispersion compensation distance = transmission distance (L) �?OTU dispersion limited distance + engineering margin

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