Bright House Networks and Fujitsu teamed up to trial the vendor’s 400 G technology over a live network.

The backbone trial was Fujitsu’s first 400G outing with a cable operator, and it used the company’s 400G optical networking transceivers over the Fujitsu Flashwave 9500 Packet Optical Networking Platforms (Packet ONPs.) Once the 400G trial was completed, an error-free rate of 800G was also attempted and achieved.

“Our work with Fujitsu allows us to further advance our current transport infrastructure, from 10G to 100G and now 400G and beyond,” said Craig Cowden, senior vice president, network Engineering, operations and enterprise solutions, Bright House Networks. “Our technology is part of people’s lives, so we continually invest in our network to deliver new and innovative solutions. This initiative provides us with the ability to upgrade the amount of bandwidth available on our existing DWDM infrastructure to support the ever-increasing high-speed data requirements of our customers and new initiatives, such as fiber-to-the-home, for years to come.”

With Fujitsu's product offerings, Bright House Networks was able to optimize its existing equipment and infrastructure while managing capital expenditures in light of the ever-increasing demand for bandwidth. Fujitsu said it successfully demonstrated delivery of 400G technology over hardware that is currently shipping.

“For over a decade we’ve been delighted to work with and support Bright House Networks, one of North America’s leading MSOs,” said Paul Fagan, senior vice president, sales and marketing, Fujitsu Network Communications. “Helping our customers build cost effective, state of the art networks is core to our optical heritage. As bandwidth growth continues to accelerate, the need for innovative network technologies is paramount. The transmission of 400G and 800G Super Channel over Bright House Network’s existing network provides validation and a path to helping them deliver world class service and experience to their customers.”

Fujitsu said its 400G and 800G Super Channel capabilities enable higher per-channel scalability; support for adaptive modulation schemes including DP-QPSK and DP-16QAM, which opens up the ability to optimize spectral efficiency while accommodating dynamically changing reach demands.

Increased spectral efficiency was achieved with Nyquist filtering techniques reducing optical signal bandwidth. Fujitsu used its nonlinear compensation (NLC) techniques to reduce the resulting optical penalties and extend the achievable transmission distance to overcome nonlinear fiber impairments due to optical transmission.