Most quantum computing discussions still focus on qubit count and gate fidelity.

But as these systems scale, the bottleneck starts to move from the quantum device itself to the links between devices.

A single chip, refrigerator, or ion trap can only go so far. Beyond that point, quantum systems need a way to connect separate modules, and many architectures start to depend on the same optical layer: telecom photons, fiber links, and single photon detectors.

That is why IonQ’s optics supply chain strategy, the $2B CHIPS Act commitment to quantum foundries, and the technical backgrounds of the scientists leading different platforms are worth looking at together.

PhotonCap’s new article maps the four layer optical interconnect stack behind quantum scaling and breaks down where listed exposure appears across $IONQ, $RGTI, $XNDU, $GFS, $TSEM, and $COHR.