Showing posts with label Opnext. Show all posts
Showing posts with label Opnext. Show all posts

Monday, July 9, 2012

Opnext Carries 100Gbps Coherent PM-QPSK Signal over 3,300 Km

Opnext supplied its OTS-100FLX 100Gbps digital coherent subsystem for an optical transmission field trial between the National Supercomputing Center, SARA, in Amsterdam and CERN in Geneva.
The test used next-generation 100Gbps single carrier technology and soft decision forward error correction (SD-FEC) to optically link Amsterdam to Geneva with a transmission distance of 1,650km using only erbium doped fiber amplifiers (EDFAs).

Opnext said the embedded fiber link comprised a combination of the relatively high-nonlinear TW+ and TWRS fibers. Furthermore, the circuit was optically looped back in Geneva, thus creating a 3,300km circuit. The looped-back 3,300km link operated error-free for more than 23 hours (BER<10-15) over the entire C-band and over a range of launch powers, highlighting the true upgrade potential of this link to 8Tbps in the future using 100Gbps coherent transponders.

The Opnext subsystem consists of a suite of OTS-100FLX 100Gbps flexponder line cards and a newly released OTS-mini ETSI shelf with a 4RU small form factor.

"This trial is another clear demonstration that coherent 100Gbps PM-QPSK transmission technology is tolerant to a very large range of impairments (i.e. chromatic dispersion, polarization mode dispersion, noise) and allows the use of alien wavelengths in research networks over DWDM systems from multiple vendors,” said Roeland Nuijts, Optical Network Architect for SURFnet. “Transmission distance and tolerance against different impairments will be critical going forward as we look to build out international networks across geographic and administrative borders in order to realize a global facility for research networking."

"It is great to see the results of our 100Gbps coherent product development deliver both the capacity and reach needed to scale next-generation optical networks around the world,” said Mike Chan, President of Opnext’s subsystems business unit. “SURFnet’s 3,300km field trial really pushed us, and our 100Gbps coherent technology met the challenge."

Tuesday, May 25, 2010

TeliaSonera Carries 127 Gbps Single Wavelength over 1,700km

TeliaSonera, in partnership with Opnext, demonstrated a single wavelength, real-time coherent 127G PM-QPSK (Polarization Multiplexed Quadrature Phase Shift Keying) modem running over a 1,700km span.

The trial conducted over a long haul link with 10 Gbps and 40 Gbps mixed traffic ran from Uppsala, Sweden to Olofström, Sweden and back for a total distance of 1700km and represents the longest un-regenerated real-time test to date. The TeliaSonera trial represents the first real-time, single wavelength 100G field trial in Europe.

Opnext noted that the transmission channel did not require optimization to implement the 100 Gbps technology, which further demonstrates the ease-of-use of coherent technology.

Currently, 10 Gbps and most 40 Gbps optical systems using direct detection require optimization and intervention by an optical network engineer to balance all of the optical impairments on an installed optical fiber. Opnext plug and play technology allows carriers to upgrade their existing line systems to 100 Gbps without requiring any change to their existing networks. In addition, new systems using Opnext technology can eliminate the need for external dispersion compensation, which reduces cost, minimizes IP latency and allows for deployment over older installed fiber.

"TeliaSonera has one of the largest and fastest growing IP backbones in Europe, and this trial demonstrates our focus on maintaining a state of the art network that is ready to use next-generation technologies, such as coherent 100 Gbps, from vendors like Opnext," said Staffan Göjeryd, Head of Broadband Development, TeliaSonera.