Silicon Photonics Hits Volume: The $22B Market Rewriting the Fiber Component Industry

Silicon photonics, the practice of building optical devices with standard semiconductor processes on silicon wafers, has been in commercial production since the mid-2010s. For most of that decade the products were modest: small-form-factor transceivers and a handful of 100G modules that competed on price rather than performance. What has happened in 2026 is categorically different. Silicon photonics is now the default manufacturing approach for the highest-volume optical components in the data center, and the scale economics that come with silicon are showing up in prices and shipment shares that the traditional III-V and discrete-optics supply chain cannot match.

The numbers that settled the argument arrived over the summer. InnoLight, the world's largest transceiver vendor by units, reported in its first-quarter results that silicon photonics accounts for more than half of its shipment mix, and named it, alongside product mix and yield, as one of three reasons its gross margin climbed to 46.1 percent. Industry trackers put silicon photonics at roughly 72 percent of 1.6T designs, with 800G closer to even. LightCounting's April forecast sized the 2026 optical module market at about $26 billion, up roughly 60 percent year over year, with 800G and 1.6T modules alone worth around $14.6 billion. By our reading, the data center slice that silicon photonics directly addresses is now a market of roughly $22 billion, and growing faster than the whole.