Astera Labs announced a definitive agreement to acquire aiXscale Photonics GmbH, a German startup specializing in precision fiber-chip coupling technology. The deal will expand Astera Labs’ semiconductor-based connectivity portfolio into integrated photonics, supporting the company’s goal of delivering rack-scale AI infrastructure optimized for the next phase of AI data center evolution—dubbed “AI Infrastructure 2.0.” Financial terms were not disclosed.
aiXscale Photonics brings proprietary optical I/O glass coupler technology designed to efficiently connect photonic integrated circuits to optical fibers in dense applications. By merging aiXscale’s precision coupling expertise with Astera Labs’ signal processing, fabric switching, and connectivity platforms (including PCIe, CXL, Ethernet, and UALink), the combined company aims to accelerate the deployment of high-volume, energy-efficient photonic chiplets for scale-up AI networks containing hundreds of accelerators.
“The transition to AI Infrastructure 2.0 demands purpose-built optical solutions that can handle the complexity and capacity needs of future scale-up networks,” said Sanjay Gajendra, COO and president of Astera Labs. “This acquisition will bring critical talent and advanced photonic technology that, when combined with our fabric switch and signal conditioning expertise, will unleash the full potential of rack-scale AI deployments.”
• aiXscale Photonics specializes in fiber-to-chip coupling for high-density optical interconnects
• Acquisition expected to enhance Astera Labs’ photonic chiplet and optical I/O development
• Combined expertise to target rack-scale AI infrastructure with advanced optical links
• aiXscale co-founders Jeremy Witzens and Florian Merget join Astera Labs team
• Transaction subject to customary closing conditions
🌐 Analysis: The acquisition aligns with Astera Labs’ broader strategy to integrate optical connectivity into its intelligent fabric and chiplet platforms, complementing its PCIe 6.0, CXL 3.0, and UALink initiatives. As hyperscalers move toward co-packaged optics and scale-up interconnects, Astera joins peers like Broadcom, Marvell, and NVIDIA in building photonics-driven AI infrastructure roadmaps.
aiXscale Photonics GmbH, headquartered in Aachen (Germany), is a spin-out of RWTH Aachen University established in 2017 by Prof. Dr. Jeremy Witzens and Dr. Florian Merget. Their mission is to deliver ultra-high precision optical glass interposer solutions for low-loss, cost-effective assembly of photonic integrated circuits (PICs) and optical transceiver sub-assemblies to serve data-communications and telecom markets. They leverage proprietary wafer-scale glass-molding and pick-and-place assembly technology that enables optical-fiber to PIC coupling with minimal design exposure, thus protecting customer IP. Key infrastructure includes custom glass interposers compatible with MPO connectors and production flows targeted at high volumes. The company attracted strategic investment from the Heraeus Group in 2023 for growth of their optical-packaging technology.
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