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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