Nokia’s PSE-6s offers 60% network power cut

Created February 16, 2023
Technologies and Products

Nokia has launched its sixth generation Photonic Service Engine (PSE), which the company says is capable of reducing network power consumption by 60%.

The PSE-6s supports a chip-to-chip interface that enables it to be deployed in pairs to power 2.4Tbps coherent line cards. This allows network operators to transport any combination of high-speed client services including 400GE and 800GE across metro, long-haul and subsea networks. With a three-fold increase in performance, PSE-6s -enabled platforms support transport of 800GE ultra-high-speed services in metro and datacentre interconnect (DCI) applications, and with reach of 2,000 km and beyond, across long-haul networks and trans-oceanic cables.

PSE-6s integrates the latest generation of 5nm coherent digital signal processors (DSPs) with Nokia’s CSTAR silicon photonics, powering the next generation of coherent transport technology operating at 130Gbaud and more, supporting up to 1.2Tbps of capacity per wavelength. It also offers an upgrade path for network operators, allowing them to upgrade their networks to PSE-6s across the 1830 family of optical networking platforms including PSS, PSI-M and PSS-x, and over existing ITU-T WDM channel plans.

Serge Melle, Director, IP-Optical Product Marketing at Nokia told Optical Connections, “One of the things that’s unique to Nokia’s 5nm generation is the continuously tuneable baud rate. What that essentially means is that on any given link, whether it’s a 200 kilometre regional link or a subsea cable, we can tune the spectrum used by the coherent optics or the number of bits transmitted to essentially be the highest possible combination of the two. That allows the maximum capacity to be extracted on a given optical fibre, and compared to some solutions that have a more discreet kind of adjustment, it ensures that with optimisation over any distance and for any bitrate, you get the best performance without leaving some capability on the table.”

The device will be debuted at MWC 2023 in Barcelona and shown at OFC in San Diego, in March.

For more information, visit


This article was written
by Peter Dykes

Peter Dykes is a independent telecoms and technology journalist who has over that last 30 years written for a wide range of B2B publications and companies. A former BT engineer, he specialises in networks and associated support systems. He is currently Editor of Optical Connections.