Both fibers are designed for durability, but G. E is often preferred in submarine and ultra-long-haul deployments due to its superior performance under extreme conditions. C is widely used in terrestrial backbone networks, where flexibility and cost-efficiency are key. G. The common core is pure SiO2,while the ordinary ones need to be doped with germanium. The loss near 1550nm is minimum, only. Therefore the G. From a technical point of view,compared to G. E fiber has no obvious advantages in power-free relay distance, which can extend the transmission distance of no-electric relay, up to 900km or more, and reduce the setting of relay. It is an improved dispersion-shifted fiber to suppress four-wave mixing; G654:Ultra low loss optical fiber, mainly used for transoceanic optical cable. 185dB/km, the. uous requirements for higher capacity optical transmission systems.
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