PSE Super Coherent Technology

Ultimate wavelength performance at any distance

Photonic Service Engine (PSE) Coherent DSPs

Nokia has been delivering coherent technology innovation to break through optical networking barriers since the first commercial deployment of a single-carrier 100G wavelength in 2010. We built on this success with the deployment of the Nokia PSE-2 super coherent digital signal processor (DSP), which achieved additional industry-first milestones.

Our new PSE-3 continues this innovation momentum by taking coherent digital signal processing to the Shannon limit for the ultimate in wavelength performance at any distance.

The first chipset to implement probabilistic constellation shaping (PCS), the PSE-3 dramatically increases capacity while lowering power and costs per bit. Probabilistic shaping enables carriers to optimize capacity and spectral efficiency on every route, and it reduces operational complexity by supporting simplified spectrum planning and automatic wavelength optimization.

These foundational PSE-3 and PSE-2 technologies power our broad optical networking portfolio. They place the right DSP performance in products to efficiently address the needs of all networking applications, including metro, long haul, data center interconnect, and subsea.

Evolution of PSE Technology

The PSE-3 super coherent DSP with PCS allows service providers and webscale companies to meet the surging traffic demands of video, cloud, and 5G by maximizing the capacity and performance of every link in the optical network.

The patented algorithms that implement PCS maximize capacity over any distance and on any fiber – from metro to subsea.

Key features

High-performance 100G–600G wavelengths
Provides the first implementation of PCS, pushing fiber-optic performance close to theoretical limits at any distance – from 10 km to 10,000 km and beyond
Increases capacity up to 65 percent over commonly deployed networks while reducing power per bit by 60 percent
Delivers optimal network capacity and reach over every route
Improves optical wavelength performance by up to 25 percent compared to today's most advanced systems
Drives down operational complexity with simplified spectrum planning and automatic wavelength optimization

The PSE-2 was the first coherent DSP with super coherent technology capable of powering flexible, multi-modulation 50G–250G wavelengths. With multiple modulation and baud rate options, products based on PSE-2 can flexibly adjust and adapt their capacities to each optical route.

Key features

High-performance, dual carrier 50G–250G wavelengths
Seven programmable wavelength modulation format options
200G 8QAM wavelengths, ideal for doubling the capacity of long-haul networks
Extended 100G wavelength reach using SP-QPSK

Industry-first deployment milestones

First 500G-capable super coherent DSP
First to support seven programmable modulation formats
First to support 200G 8QAM long-haul wavelengths, leading to a doubling of long-haul network capacity
First coherent DSP to support 500G line-capable equipment for both service provider- and webscale-optimized form factors, providing a combination of leading spectral efficiency and port density
First set partitioned QPSK (SP-QPSK) modulation format, enabling unregenerated terrestrial reach from >3,000 km

PE infographic