Optical modules are being phased out
Traditional optical modules are gradually being replaced by integrated and co-packaged optics (CPO) due to advances in silicon photonics and the demands of AI-driven data centers.
Technological Drivers
The shift away from pluggable optical modules is primarily driven by silicon photonics and co-packaged optics (CPO), which integrate lasers and optical components directly onto silicon chips. Nvidia's Spectrum-X switches, for example, use CPO technology to achieve 5x better energy efficiency, 5x longer AI system uptime, and 10x higher reliability compared to traditional optical modules, while eliminating the need for expensive, field-replaceable modules costing $800–$2,000 each . Embedded solutions like On-Board Optics (OBO) and Near-Packaged Optics (NPO) are also gaining traction, offering higher bandwidth with lower power consumption, which is critical for AI clusters and hyperscale data centers .
Market and Supply Chain Implications
The transition to integrated optics is reshaping the supply chain. Traditional optical module manufacturers face pressure as major players like Nvidia, Microsoft, and Amazon develop in-house CPO solutions. Supply constraints for critical components, such as helium-3 for lasers, and geopolitical factors affecting production in Russia and China, further accelerate the shift . By 2029, CPO is expected to become the de-facto standard, with traditional modules surviving only in legacy 200G-and-below segments .
Future Outlook
Despite the phasing out of traditional modules, optical technology continues to evolve. The industry is moving toward 800G, 1.6T, and 3.2T modules, with integrated laser sources on silicon photonic chips reducing cost, power, and assembly complexity . Hyperscalers are adopting these high-speed modules to support AI training clusters and spine-layer upgrades, while the cost per gigabit is expected to decline steadily, making integrated solutions more attractive . However, supply bottlenecks for ultra-high-speed transceivers may persist, potentially limiting deployment until production scales up .
Summary
In essence, optical modules are being phased out in favor of integrated and co-packaged optics due to their superior efficiency, bandwidth, and suitability for AI and hyperscale data centers. While traditional modules will remain in niche or legacy applications, the broader market is rapidly transitioning toward silicon photonics-based solutions, reshaping both technology and supply chains in the coming decade .
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