Next Generation 200Gbps PON Full Fibre Broadband Standard Inches Closer

At present most fixed broadband networks in the UK are focused on deploying 10Gbps capable XGS-PON based full fibre (FTTP) technology for retail ISPs, while less than a handful are playing with 50Gbps (50G-PON) technology (here, here and here) and CityFibre has talked about 100Gbps for the mid-2030s (here). But the next gen 200G PON technology is also making progress, and it’s a major shift.

The Passive Optical Network (PON) standards are how we define the technology that sits under most deployments of Fibre-to-the-Premises (FTTP) broadband, which harness passive optical splitters (i.e. they don’t require any electrical power to distribute the light signal) to deliver broadband connectivity from a single fibre to multiple end users (P2MP – Point to Multipoint).

In this setup the signal usually starts in an exchange / data centre, where it goes through an Optical Line Terminal (OLT), before later passing through a passive splitter that spreads the signal across multiple fibres to reach the Optical Network Terminals (ONT/ONU) inside homes. For example, in CityFibre’s latest 10Gbps capable XGS-PON fibre network they split a single fibre to serve 64 premises (split ratio), although XGS can handle up to 128.

Cutting edge 50G-PON technology uses various improvements to deliver its faster speeds (i.e. more efficient signal modulation – PAM4 – and higher-speed lasers etc.) and can also increase that split ratio up to “at least” 256 (dependent upon the OLT’s capabilities), while 100G-PON should be able to handle up to 512.

Suffice to say that going faster with the latest tech isn’t just about speed, but it can also make the network more cost-efficient, depending upon how the operators choose to set them up.

Say Hello to 200G-PON

At present 50G-PON is an official, ratified, and standardised technology that is in now in the early stages of commercialisation, which means we’ll probably start to see more network operators adopting it over the next few years as the hardware matures (Netomnia already have). We aren’t going to cover 25G-PON as many operators in the UK are opting to skip that one and jump right to 50G-PON from XGS.

By comparison, 100G-PON is still an emerging technology (trials are taking place) and the standard for it has yet to be fully finalised (expected this year), so in practical terms it’s still a few years away from real commercial deployments (expected 2030 in some countries, albeit probably later than that in the UK – there’s no rush).

However, technology never stands still, thus we’ve already started to see 200G-PON making progress. At present 200G-PON is only in the earliest stages of standards development within ITU-T Study Group 15 and the FSAN consortium, which predicts that the standard could be finalised by 2030.

In theory the first bleeding edge commercial deployments of 200G-PON might thus not take place until the mid-2030s and probably closer to 2040 for real deployments, but not everybody plays by those rules. Back in October 2025, e& UAE, the telecom arm of global technology group e&, announced the successful demonstration of the world’s first 200G PON prototype at GITEX GLOBAL 2025.

The above was yesterday followed by Chinese technology firm ZTE Corporation (ZTE is banned from UK telecoms networks) unveiling the industry’s first multi-ONU burst 200G-PON prototype at MWC Barcelona 2026, achieving the promised transmission rate of 200Gbps. But there’s more to this upgrade than meets the eye.

ZTE Statement on 200G-PON Prototype

The introduction of coherent technology into 200G-PON significantly enhances transmission speed and unlocks spectrum potential. However, the P2MP architecture of PON systems poses a major challenge. Coherent transmission is typically used for continuous signals, while PON uplink involves short bursts from multiple ONUs, imposing extremely high requirements on both transmission and reception. ZTE’s newly released prototype addresses this critical challenge through breakthrough innovations, achieving seamless integration of coherent technology with the P2MP architecture, delivering both performance and efficiency gains.

ZTE has pioneered an innovative optical signal “flash switch” technology, enabling nanosecond-level on-off switching of burst frames at the transmitting end. This advancement dramatically improves burst signal switching gain while ensuring zero interference between multiple ONU burst frames, effectively addressing the industry challenge of rapid start-stop control in high-speed optical signals. At the receiving end, ZTE achieved ultra-fast 50ns frame recovery, substantially reducing transmission overhead and boosting throughput, thereby supporting massive concurrent terminal access with high efficiency.

This prototype release marks another milestone in ZTE’s continuous innovation in optical access. It underscores the company’s leadership in global optical communications and provides critical technical support and practical reference for the development and refinement of international 200G-PON standards. Looking ahead, ZTE will continue to advance optical communication technologies, deepen global industry collaboration, actively participate in standards development, and drive the evolution of the 200G-PON ecosystem—laying a solid all-optical foundation for the digital economy.

Just to help explain the above a bit more. Unlike prior PON technologies, which have tended to use simpler direct-detection optics, 200G-PON designs are currently looking toward what’s known as coherent optics (i.e. using advanced modulation methods like QAM-16 instead of PAM etc.) – as already used in many long-haul (e.g. subsea) fibre networks.

The above move, combined with an effort that aims to blur the lines between access networks and metro optical networks, will mark a significant shift from past PON technologies. On the surface this might seem to make such networks more complex and thus costly, but in theory it could eventually reduce network layers and thus hardware costs, which would in turn also produce faster latency times and enable the optical signal to reach several times further.

Put another way, while 100G-PON and those that came before it are more akin to routine evolutionary shifts, 200G-PON could perhaps be described as much more of a revolutionary upgrade and is thus worth keeping a close eye on. But in any case, it’ll be a very long time before we see it in the UK, at least outside of any early Proof of Concept (PoC) trials that might crop up in the next few years.