Key Findings
The optical connectivity architecture within AI and data center infrastructures is currently undergoing a significant evolution, shifting from traditional pluggable optical transceivers towards more integrated, low-power consumption models. Credo champions Near-Package Optics (NPO) as a crucial step in this evolution. NPO enables the direct integration of laser sources with photonic integrated circuits, which effectively reduces optical coupling losses and substantially simplifies system-level implementation. This approach provides a practical solution that balances enhanced bandwidth and power efficiency, essential for demanding AI workloads, with compatibility with existing manufacturing processes and improved system serviceability.
Technical / Clinical Details
NPO is a technology that positions optical interconnects in close proximity to main chips like switch ASICs. This design allows for optical-to-electrical conversion to occur physically closer to the chip, thereby shortening electrical signal pathways and reducing signal degradation and associated power consumption. While Co-Packaged Optics (CPO) aims for ultimate integration by embedding optical components within the same package as the ASIC, NPO maintains external laser sources while placing them in very close proximity to the chip. This design mitigates thermal management challenges compared to CPO and improves serviceability, as lasers can be replaced as individual components. NPO can meet the demands of next-generation high-speed interconnects, such as 1.6T and 3.2T, while minimizing disruption to existing infrastructure and supply chains.
Background & Context
The explosive growth of AI involves immense data movement within data centers, which has exposed the physical limitations of traditional electrical interconnects. Power consumption and latency have become major bottlenecks in scaling AI clusters, driving the industry to rapidly transition to optical connectivity solutions. While CPO is considered the long-term goal, its complex manufacturing processes and thermal management challenges suggest that widespread adoption will take time. NPO emerges as a pragmatic option for the interim period, offering many of CPO’s power efficiency benefits while enabling faster market introduction and operational flexibility. Credo, leveraging its expertise in optoelectronic integration, is leading the charge in developing the NPO market.
Strategic Significance & Outlook
NPO is poised to play a vital role in significantly improving the power efficiency of AI data centers and reducing operational costs. Due to its compatibility with existing manufacturing ecosystems, NPO is likely to penetrate the market more quickly than CPO. This will lead to enhanced performance for AI workloads and facilitate the construction of denser data centers. Credo’s focus on NPO strategically positions the company to strengthen its leadership in the optical connectivity market. In the future, the technologies and experiences gained from NPO are expected to serve as a bridge, paving the way for the further evolution and widespread adoption of CPO. Data center interconnect technology is steadily transitioning towards a more sustainable and high-performance future through the introduction of NPO.
Source: https://credosemi.com/blogs/near-package-optics/
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