In the optical communications industry, one technology term is moving from research laboratories into large-scale manufacturing and evolving from a topic of engineering discussion into a key factor in procurement decisions: silicon photonics.
If you had asked an optical transceiver procurement manager in 2024 whether they would consider silicon photonics, they might have hesitated. Although silicon photonics already accounted for close to 50% of the 800G optical transceiver market at the time, many buyers still preferred the more established EML approach. After all, reliability has always been a top priority in data center operations. By 2026, however, the landscape has changed significantly. Industry expectations suggest that silicon photonics will account for more than half of 1.6T optical transceiver shipments in 2027. Silicon photonics is no longer merely an alternative technology; it is increasingly becoming a mainstream choice.
What is driving this transformation? The answer can be summarized in one word: economics.
The core advantage of silicon photonics lies in its ability to manufacture photonic chips using standard semiconductor manufacturing processes, particularly wafer-level fabrication, rather than relying entirely on the complex compound-semiconductor epitaxial growth and assembly processes traditionally associated with EML-based solutions.
What does this mean in practice? It means manufacturers can potentially scale production more rapidly and reduce unit costs as volumes increase. According to projections cited by CITIC Securities, global shipments of datacom optical transceivers are expected to reach 130 million units in 2027 and 168 million units in 2028. Meeting this level of rapid market expansion will require highly scalable manufacturing technologies, and silicon photonics is well positioned to play a significant role.
The cost implications are particularly compelling. Innolight has reported that the yield of its internally developed silicon photonics chips has reached 95%, with costs approximately 30% lower than those of traditional approaches. These figures illustrate the potential economic benefits of silicon photonics at scale, although actual savings depend on product design, manufacturing maturity, and the cost baseline used for comparison.
Consider a data center planning to purchase 100,000 units of 1.6T optical transceivers. If a comparable silicon photonics solution delivers a 30% reduction in unit cost, the resulting procurement savings could amount to millions of dollars, depending on the original unit price. For hyperscale operators managing large optical interconnect deployments, even a modest reduction in the cost per transceiver can translate into substantial budget savings.
Another advantage that is easy to overlook is power consumption. Silicon photonics can offer favorable power characteristics in certain high-speed architectures operating at 200G per lane and above. As optical transceiver speeds evolve from 800G to 1.6T and eventually 3.2T, increasing per-lane data rates place greater demands on electrical signal transmission. Silicon photonics' high level of integration can help address these challenges by enabling more compact optical architectures and closer integration between photonic and electronic components.
Higher integration can also support shorter signal paths, reduced electrical transmission losses, and improved signal integrity when the overall architecture is appropriately designed. These benefits become increasingly important as AI data centers push toward higher bandwidth density and greater energy efficiency.
Of course, silicon photonics is not without its challenges. Modulation efficiency, optical coupling losses, and temperature sensitivity remain important areas for engineering optimization. Integration of photonic and electronic components also requires careful design, packaging, and thermal management. Nevertheless, silicon photonics has made substantial progress in manufacturing maturity, product standardization, and commercial deployment. The remaining challenges are increasingly focused on improving manufacturing yields, optimizing performance, and further reducing costs as production scales.
For overseas procurement professionals, choosing between silicon photonics and EML depends on the specific application and purchasing strategy.
If your deployment involves short-reach interconnects within AI training clusters, where power consumption and cost are major considerations, silicon photonics may offer a compelling solution. Its integration advantages and potential for scalable manufacturing make it particularly attractive for high-volume deployments.
If your application involves longer transmission distances, such as certain data center interconnect (DCI) scenarios, or if your procurement strategy prioritizes a well-established supply chain and proven product configurations, EML-based solutions may remain an attractive choice in the near term. However, neither technology is universally superior. The optimal choice depends on transmission distance, optical performance requirements, power budgets, component availability, and total cost of ownership.
Regardless of which technology you favor, one broader industry trend is becoming clear: pluggable optical transceivers are expected to remain important in the coming years, while 800G and 1.6T products will coexist for an extended period as data center operators upgrade their networks at different rates.
This means your procurement strategy should not force an either-or decision between silicon photonics and EML. Instead, it should establish a flexible supplier ecosystem capable of supporting multiple technologies, product generations, and application scenarios. Such an approach can reduce supply chain concentration risks while allowing your organization to adapt as technical requirements and market conditions evolve.
When evaluating silicon photonics suppliers, buyers should focus on three critical dimensions.
The first is in-house silicon photonics development capability. Suppliers with their own photonic chip design and development capabilities may have greater control over cost structures, product roadmaps, and iteration cycles. Buyers should assess not only whether a supplier claims to have proprietary technology, but also how deeply that capability extends into chip design, process optimization, packaging, and system integration.
The second is mass-production and delivery track record. Experience delivering products at scale, particularly to major cloud service providers and hyperscale data center customers, can provide valuable evidence of manufacturing readiness. Buyers should request relevant production references, yield trends, quality metrics, and on-time delivery performance rather than relying solely on prototype demonstrations or headline specifications.
The third is optoelectronic co-design capability. Silicon photonics performance depends on more than the photonic chip itself. The interaction between the optical engine, DSP, driver electronics, packaging, and thermal management system also plays a critical role. Suppliers that can optimize these elements together are better positioned to deliver balanced performance, power efficiency, reliability, and manufacturability.
The maturation of silicon photonics signals a broader transformation: ultra-high-speed optical connectivity is moving from a premium technology toward an increasingly essential component of modern data center infrastructure. As AI workloads expand and network bandwidth requirements continue to rise, procurement decisions will increasingly depend on how effectively suppliers balance performance, scalability, and cost.
For buyers planning their data center architecture for the 1.6T era, understanding the economic logic of silicon photonics is no longer optional. It can directly influence procurement budgets, supply chain resilience, and long-term network competitiveness.
The real value of silicon photonics is not simply that it enables faster optical interconnects. It is that scalable manufacturing and higher integration can help make next-generation bandwidth economically viable at hyperscale. For procurement teams, the opportunity lies in identifying suppliers that can translate this technological potential into consistent quality, competitive pricing, and reliable volume delivery.
