Ciena extends its reach inside the data center with Nubis acquisition

September 26, 2025

By adding ultra-efficient optical engines and linear redrivers to its chip-and-optics toolkit, Ciena advances toward faster, lower-power interconnects for AI-driven data centers, without becoming entangled in switch-ASIC battles.

Ciena expands its presence in data centers with the acquisition of NubisCiena strengthens its position in the data center sector with the strategic acquisition of Nubis. This transaction marks a new stage in the company’s expansion strategy in the advanced optical infrastructure market. Martin Vallo, PhD, Senior Technology & Market Analyst, Photonics at Yole Group, shares his analysis of this acquisition.

This article is related to the following reports: Optical Computing 2024 – Co-Packaged Optics for Data Centers 2025 – Quantum Technologies 2025 – Silicon Photonics 2025 – Focus on SOI, SiN, and LNOI platforms…

Ciena buying Nubis is a smart way to reach deeper into the data center without getting drawn into the switch-ASIC wars. Nubis adds two major enhancements: ultra-efficient optical engines (no DSP, up to 6.4T full duplex, ~30% lower power/bit at 200G) and linear redrivers that enable active copper to reach ~4 m at 200 Gb/s per lane. Combine that with Ciena’s 448G SerDes and coherent know-how, and you get a clear path to faster, lower-power interconnects beyond 6.4T optical engines.

This deal expands Ciena’s data-center interconnect lineup and gives it new ways into AI clusters where power, latency, and cost per bit really matter. It also deepens Ciena’s chip-and-optics toolkit, including SerDes, converters, lasers, modulators, and photodiodes, while steering clear of direct fights with Broadcom or Marvell on switch ASICs.

Ciena now covers more ground from long-haul coherent links to near-chip optical I/O with an open CPO/NPO plus active-copper strategy. That lowers development risk, fits more customer use cases, and strengthens Ciena’s position in AI-era data centers.

About the author

Martin Vallo, PhD, is Senior Technology & Market Analyst, Photonics at Yole Group. Martin specializes in optical communication and semiconductor lasers within the Photonics & Sensing activities at Yole Group. With 12 years’ experience in semiconductor technology, Martin is currently involved in the development of technology & market products as well as the production of custom consulting projects.

Prior to Yole Group, Martin worked at CEA (Grenoble, France), with a mission focused on the epitaxial growth of InGaN/GaN core-shell nanowire LEDs by MOCVD and their characterization for highly flexible photonic devices.

Martin graduated from the Academy of Sciences, Institute of Electrical Engineering (Slovakia) with an engineering degree in III-nitride semiconductors.”