Photonics found its foundry model, and the effect resembles electronics in the 1980s

Integrated photonics has advanced steadily for two decades, but the change with the largest practical consequence is organisational rather than physical: the arrival of a working foundry ecosystem.

What the model provides

A photonic foundry offers a stable fabrication process and a process design kit — a library of characterised building blocks with models accurate enough to simulate a circuit before committing to fabrication. Waveguides, couplers, modulators, detectors and phase shifters come with performance data and design rules.

Multi-project wafer runs let several customers share a wafer and its mask cost, reducing the price of a prototype from a fab-scale investment to something a research group or startup can fund.

Why this matters more than any device result

Before this, designing a photonic chip meant either owning a fabrication capability or negotiating a bespoke arrangement with someone who did. Each design cycle was slow and expensive, and knowledge stayed inside the few organisations with facilities.

The foundry model separates design from fabrication, which is precisely the separation that let electronics scale. Design teams can specialise in circuits and systems without capital equipment, and the number of people able to attempt a photonic design rises by orders of magnitude.

The material platforms

Silicon photonics dominates by volume, leveraging CMOS infrastructure. It cannot emit light, so lasers are attached rather than grown, and integration is the persistent challenge.