Nubis Communications introduced a Linear Redriver that enables a 4-meter reach for 200Gbps per lane copper cables, facilitating the interconnection of AI accelerators across multiple server racks. Leveraging its established linear high-speed analog technology initially developed for optical applications, Nubis extends these capabilities to copper, providing an extremely low-power, low-latency solution ideal for scaling AI and ML architectures.
Linear redriver technology enhances the signal integrity of copper cables by amplifying and equalizing signals without the need for full signal retiming. Unlike retimed solutions that require DSPs, Nubis’ linear approach works directly with advanced digital SerDes built into hosts, substantially reducing power usage, cost, and latency, while simultaneously extending the effective reach of copper cables at very high data rates.
The company says its new Nitro solution is designed to achieve 10 times less power, 100 times lower latency, and significantly lower cost compared to digital signal processor (DSP)-based alternatives, and provides double the power efficiency and reach compared to legacy analog equalizers.
Nubis is partnering with Amphenol Communications Solutions to introduce a family of Active Copper Cable (ACC) products based on the Nitro Linear Redriver technology. These ACC products are housed in OSFP connectors, supporting 8 lanes of 200Gbps in each direction at just 2.5 Watts per connector. This partnership aims to enhance copper cable viability in AI infrastructure, enabling high-density, energy-efficient inter-rack connectivity. Nubis and Amphenol will demonstrate this technology at the OFC 2025 conference in San Francisco from April 1-3.
• Nubis introduces Nitro Linear Redriver for copper cables, enabling up to 4-meter reach at 200Gbps per lane.
• Achieves significantly lower power, latency, and cost compared to DSP-based solutions.
• Nitro supports scalability of AI accelerators across multiple racks, greatly increasing xPU count.
• Partnership with Amphenol to deliver Active Copper Cable products utilizing Nitro technology.
• Nitro Linear Redriver products (N2004 and N2008) are currently sampling to customers.
“Nubis Nitro leverages the strength of linear optics for copper cables, delivering a highly efficient solution that addresses the growing interconnect challenges of AI scale-up networks,” stated Dan Harding, CEO of Nubis.