Celero Communications Secures $275 Million for 1.6T/3.2T AI Optical Interconnects After Verifying 2nm Coherent DSP Silicon

September 20, 2026

Semiconductor Engineering USA

Overview

Celero Communications has raised $275 million for next-generation 1.6T to 3.2T AI optical interconnects, following successful verification of its 2nm coherent DSP silicon. This substantial funding highlights significant industry investment in advanced optical interconnects for AI data centers. Rapid progress is underway towards higher-capacity solutions, focusing on both traditional pluggable optical modules and innovative architectures like CXL-over-optics to optimize data center operations.

In Depth

Key Findings

Celero Communications has successfully secured $275 million in funding for its next-generation 1.6T to 3.2T AI optical interconnect solutions, a significant capital injection following the successful verification of its 2nm coherent Digital Signal Processor (DSP) silicon. This substantial fundraising effort underscores the robust market confidence and investment appetite for advanced optical interconnect technologies, which are crucial for meeting the burgeoning demands of AI data centers.

Technical / Clinical Details

The 2nm coherent DSP silicon verified by Celero Communications is poised to dramatically enhance data processing capabilities and energy efficiency in optical communications. This technology forms the bedrock for enabling ultra-high-speed AI optical interconnects at 1.6T and 3.2T. These interconnects are indispensable for low-latency, high-efficiency transfer of the massive data volumes generated by AI workloads, both within and between data centers. The industry is currently pushing forward rapidly with higher-capacity solutions, focusing not only on improving traditional pluggable optical modules but also on developing innovative architectures such as CXL-over-optics (CXL-o-O). CXL-o-O has the potential to enable optical-based memory sharing between CPUs and accelerators, thereby alleviating critical bottlenecks in AI systems.

Background & Context

The evolution of AI places unprecedented demands not only on the computational power of data centers but also on their interconnectivity capabilities. Specifically, training and inference of large-scale AI models require immense data exchange among thousands of GPUs and AI accelerators. Traditional electrical interconnects are nearing their limits in terms of transmission distance, power consumption, and signal degradation. Consequently, optical interconnects—especially new forms like coherent technology, Near-Packaged Optics (NPO), and Co-Packaged Optics (CPO)—are emerging as key enablers for exponentially boosting AI data center performance. Celero’s successful funding round further validates the intensifying investment in this critical domain.

Strategic Significance & Outlook

The $275 million funding secured by Celero Communications positions the company as a significant player in the AI optical interconnect market. This capital will accelerate the research, development, and commercialization of its 1.6T/3.2T optical interconnect solutions, promising substantial improvements in the performance and efficiency of AI data centers. The rapid progress toward higher-capacity solutions is expected to support the continuous growth of AI infrastructure and expand the possibilities for future AI applications. Furthermore, the introduction of innovative architectures like CXL-o-O holds the potential to transform the very philosophy of data center design.

Source: https://semiengineering.com/chip-industry-week-in-review-155/

Get our weekly technology intelligence — free

Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.

Subscribe Free — Weekly Tech Intelligence

By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.