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Huawei unveiled a WDM prototype based on a flexible 12.5 GHz wavelength grid , improving upon the current mainstream commercial products that use a 50GHz of 25 GHz fixed spectrum interval. The flexibility of the wavelength spacing lays a foundation for multi-carrier technologies and next-generation bandwidth-flexible optical networks beyond 100G.

Huawei said its WDM prototype developed increases the spectrum utilization for large-capacity WDM systems. The WDM prototype supports 40G, 100G, 400G and 1T hybrid transmissions and is compatible with the 50GHz or 25GHz spectrum interval legacy systems. It provides smooth evolution from 40G and 100G systems to 400G and 1T systems, effectively protecting investment on current networks. Huawei expects next-generation, bandwidth-flexible optical networks will leverage systems capable of automatic adjustment of the modulation mode and line rate based on the transmission distance and service capacity, constantly changing the frequency width utilization. The 12.5GHz granularity enables flexibility in the adjustment of bandwidth, distance, and frequency width, freeing up more of the available spectrum to transmit services.

Jack Wang, president of Huawei Transport Network Product Line, said: "After releasing the world’s first 10 petabit all-optical switch prototype and the 400G DWDM prototype, Huawei has provided a preview of next-generation optical networks by unveiling the highest efficiency spectrum WDM prototype. Huawei is committed to providing innovative solutions in the field of optical networks and to making significant contributions in broadband network construction to further develop next-generation optical transmission technologies."