Huawei has presented a prototype of WDM systems with the highest spectral efficiency

Huawei has unveiled a prototype of WDM, which is an improved version of the commercial equipment with a fixed channel spacing 50 GHz. According to the manufacturer, the prototype of WDM systems differs very high spectrum efficiency of existing solutions WDM. It supports a variety of intervals between channels with a minimum pitch 12.5 GHz, which not only improves the efficiency of spectrum use and flexibility of the system WDM, but also lays the groundwork for the technology to support multi-carrier channels and next-generation optical networks at speeds above 100G and variable bandwidth . This technology is highly efficient use of spectrum will allow operators to build networks WDM, corresponding to the needs of customers in the future.

In Huawei note that all modern WDM systems have the spacing between channels 50 and 25 GHz, a spectral efficiency is not sufficient for 400G networks, or networks 1T with support for multiple carriers. The new prototype WDM Huawei improves the efficiency of spectrum use in WDM systems, large capacity. This compact solution will provide a more dense placement of high-speed carrier channels and better utilization of spectrum resource of the optical fiber.

The prototype supports the simultaneous transmission of WDM 40G, 100G, 400G and 1T. In addition, it is compatible with conventional systems with channel spacing of 50 or 25 GHz. In practice, this means a seamless upgrades to 40G and 100G 400G and 1T systems with the effective protection of investments in existing network.

Efficient use of spectrum technology is one of the key technologies of optical next-generation networks with adjustable bandwidth. Signals of such networks provide automatic tuning mode of modulation and transmission rate depending on the length of the line services and capacity, as well as a permanent change to use the range of the spectrum. Step 12.5 GHz provides a more flexible adjustment of the bandwidth, transmission range and frequency range, which frees resources for the frequency of data transmission.