Quantum hasn’t yet got to the point where I can say, like I did with Cisco routers long ago “I know where the bits come from and go to underneath that piece of road digging”, though there have been SQUIDs (superconducting quantum interference devices) in use as very sensitive magnetometers for a long time. SQUID sensors market trends
Packaging and photonics links
Lasers https://www.scottishfinancialnews.com/articles/scottish-tech-firm-powerphotonic-targets-new-markets-with-ps26m-maven-funding-boost Maven Capital Partners has invested £2.6 million in Scottish advanced laser systems pioneer PowerPhotonic .. follow on from Archangels and Scottish Enterprise Headquartered in Dalgety Bay, Scotland, with a high-volume manufacturing facility in Arizona, USA, PowerPhotonic is a global leader in precision micro-optics for laser applications.
https://www.novuslight.com/first-electronic-photonic-quantum-chip-manufactured-in-commercial-foundry_N13549.html Global Foundries. Northwestern University, Boston University (BU) and University of California, Berkeley (UC Berkeley) have built a tiny photonic quantum system into a traditional electronic chip.
Nvidia co-packaged silicon photonics – switches – and the partner list https://www.nvidia.com/en-us/networking/products/silicon-photonics/https://developer.nvidia.com/blog/scaling-ai-factories-with-co-packaged-optics-for-better-power-efficiency/ block diagrams
Microsoft – quantum safe cryptography https://www.microsoft.com/en-us/security/blog/2025/08/20/quantum-safe-security-progress-towards-next-generation-cryptography/
Cunning Systems 