Huawei takes on the 100G PON challenge

Huawei is adding some heat to the emerging 100G PON optical access space by introducing its own time and wavelength division multiplexed passive optical network (TWDM PON) system.

With a lab prototype as a foundation, Huawei said the new 100G-PON technology leverages a hybrid time-division and wavelength-division architecture to support a 4 x 25 Gbps downstream rate and a 4 x 10 Gbps upstream rate, and enables 100G access rate per port on existing optical distribution networks (ODNs). In addition, the technology establishes compatibility between 100G PON and GPON/10GPON/40G TWDM PON, allowing carriers to execute upgrades as their bandwidth needs scale.

Besides delivering access services to residential and business customers, the 100G-PON system can support backhaul for fiber to the curb/basement/office and mobile stations.

During the testing process of this system, Huawei's optical access innovation lab looked at three methods to improve PON access rates: increasing the number of wavelength paths and improving the utilization of the electronic spectrum; assessing how to reduce the dispersion penalties which occur when the line rate reaches 25 Gbps; and eliminating the non-linear effect to increase the single-wavelength rate from 10G to 25 Gbps.

Huawei claims that the 100G-PON system will be also able to support 200 Gbps by supporting wavelength paths.

Huawei is hardly alone in its desires.

Working in conjunction with Vodafone, Alcatel-Lucent (NYSE: ALU) introduced its own TWDM-PON system during the Broadband World Forum event in Amsterdam. The vendor said that since its TWDM-PON technology is supported by 7360 Intelligent Services Access Manager FX solution, it can ensure a "smooth network evolution" for its service provider customers.

Alcatel-Lucent is being aggressive with its TWDM-PON program with plans to introduce a 4-port TWDM-PON line card and optical network unit supporting 10G symmetrical bitrate. These products will be available in the first quarter of 2015.

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