Interoute has completed testing of Infinera’s new 500 Gbps photonic integrated circuits (PICs) delivering 100 Gbps channels over a fiber route from Amsterdam to London. 
The 100 Gbps channels originated in Amsterdam and traveled under the North Sea to London, where they were looped back and returned to Amsterdam, for a total distance of 940 km. The signals were received error-free despite a lengthy unrepeatered subsea link of 210 km between the Dutch and English coasts.
In this demonstration, the 100 Gbps channels were transmitted using PM-QPSK modulation and coherent detection to optimize for optical reach. Infinera’s 500G PIC receivers use integrated local oscillators to enable coherent detection of the signals. The pair of 500G PICs integrates more than 600 optical devices, a tenfold increase from today’s 100Gb/s PICs which are widely deployed in long-haul and metro networks worldwide. The coherent 100Gb/s channels were transmitted on fiber simultaneously carrying 200Gb/s of live traffic over 10Gb/s channels, demonstrating that the Infinera Line System (ILS) can carry both types of optical signals without interference.
Interoute, whose pan-European network was the first in Europe to deploy Infinera’s 100 Gbps photonic integrated circuits more than three years ago, is planning to use Infinera’s next generation systems based on 100 Gbps channels enabled by 500 Gbps PICs.http://www.interoute.com http://www.infinera.com
