Silicon photonics market seen growing to $27.35 billion by 2035

The global silicon photonics market is projected to surge from $3.04 billion in 2025 to $27.35 billion by 2035, driven by AI data center demand and the shift to co-packaged optics. The report points to 800G and 1.6T interconnect upgrades, expanding use cases in automotive LiDAR and sensing, and growing competition among chipmakers, foundries and startups.

Why it matters: - Silicon photonics is moving from a niche optical technology into core infrastructure for AI data centers. - The market’s growth reflects a broader shift away from copper and pluggable optics toward higher-density, lower-power interconnects. - The technology could also expand into automotive LiDAR, biosensing and quantum computing.

What happened: - The global silicon photonics market reached an estimated $3.04 billion in 2025. - Market Research Future projects the market will reach $27.35 billion by 2035. - The forecast implies a 25.1% compound annual growth rate over the period. - The report was issued from Yokohama, Japan, on June 26, 2026.

The details: - The market was about $1.1568 billion in 2021, then nearly tripled by 2025. - Hyperscale data centers are the main demand driver as AI training and inference traffic strain electrical interconnects. - Global AI workloads are projected to push optical interconnect traffic up by more than 300% between 2024 and 2030. - The report highlights a move from 400G to 800G and 1.6T optical interconnects. - Co-packaged optics, or CPO, is replacing traditional pluggable transceivers at the chip-to-chip level. - CPO can improve power efficiency by 30% to 50% at equivalent bandwidth. - Silicon photonic circuits integrate lasers, modulators, waveguides and detectors on CMOS-compatible substrates. - A LightCounting analysis cited in the release says 800G and 1.6T silicon photonics transceivers are being deployed at scale by Microsoft, Google, Meta and Amazon. - The report says silicon photonics is also extending into LiDAR, biosensing and quantum computing interconnects. - The report segments the market by component, product, application, data rate and organization size. - Component segments include transceivers, variable optical attenuators, switches, WSS, cables and sensors. - Product segments include optical transceivers, optical switches, optical cables, photonic sensors and co-packaged optics. - Application segments include data center and high-performance computing, telecommunications, military and defense, medical and life sciences, automotive LiDAR and consumer electronics. - Data-rate segments include 100G/200G, 400G, 800G and 1.6T and above. - Organization-size segments include SMEs and large enterprises, including hyperscalers and network operators.

Between the lines: - The market outlook signals a structural redesign of data center networking, not just a faster version of current optical hardware. - The biggest commercial opportunity appears to be in the link between AI accelerators and switches, where power and density limits are tightening. - Competition is likely to center on manufacturing yield, foundry access and advanced packaging partnerships. - Heterogeneous laser integration remains a key technical hurdle because silicon cannot natively generate laser light efficiently. - The report suggests companies that solve packaging and integration problems may gain the strongest position in the supply chain.

What's next: - Broader CPO rollout is expected to accelerate between 2026 and 2030. - Vendors are industrializing wafer bonding, micro-transfer printing and quantum dot laser growth on silicon to enable fully integrated light sources. - Market momentum is likely to stay tied to AI infrastructure spending, especially in hyperscale data centers. - Regional growth should remain strongest in North America and Asia-Pacific, with the United States, Taiwan and China positioned as key hubs. - The report points to growing demand from sovereign AI buildouts in the Middle East and expanding infrastructure investment in Latin America.

The bottom line: - Silicon photonics is becoming a critical enabling layer for AI-era computing, and the fastest growth is tied to how quickly the industry shifts to co-packaged optics and higher-bandwidth optical interconnects.