17 MARCH 2009 -- Ericsson (search Lightwave for Ericsson) and Deutsche Telekom (search Lightwave for Deutsche Telekom) report a successful field trial of higher bandwidth optical transmission as part of the publicly funded 100GET R&D project. The new technology tested (delivered in this trial from the Marconi MHL 3000 WDM platform) is designed to accommodate steadily growing broadband services in fixed and mobile broadband networks.
The demonstration used an existing link with mixed 10G and 40G traffic with a 50-GHz channel spacing. The partners achieved a line rate of 112 Gbps using polarization multiplexed RZ-DQPSK and a fast polarization tracker over 600 km of standard singlemode fiber. The link included multiple ROADMs and unequally distributed amplifiers. With links optimized for distance, more than 1200-km optical path length has been demonstrated in lab environments using the technology, Ericsson says.
Hans-Dieter Haag, member of the CTO-organization within Deutsche Telekom's HQ, said, "For today's and future transport networks, a flexible optical transport plane is an unquestioned necessity both regarding technical and commercial scaling. This leverages the value of our exiting fiber assets and helps us to cope with the bandwidth/revenue paradoxes. Furthermore, it is a key technology to support our efforts in corporate sustainability and power efficiency. Deutsche Telekom is actively contributing to the definition of various 100G standards. We are pleased to see the continuous scaling capabilities of already deployed equipment with mixed 10G and 40G traffic to be used even for the transmission of 100G channels."
HÃ¥kan Eriksson, senior vice president and CTO of Ericsson, said, "100G transmission is at the cutting edge of optical technology and is expected to become a key requirement for many network operators in the coming years. It is an excellent fact that Ericsson is already now displaying our capabilities to demonstrate the technology and work closely with customers like Deutsche Telekom and standards bodies to refine the technology."
In the course of the running R&D project 100GET, DT and Ericsson will continue with field trials throughout 2009 and further cooperate closely with customers to determine the best modulation formats to ensure that the products fit future requirements.