Photonics and the Future of Computing
Photonic computing is like hollow core fibre. The advantages are so great in each case that their long term adoption appears almost inevitable. Logic gates in traditional silicon-based computing rely on using electric charges to represent binary information. The drawbacks are quite clear. The electricity becomes heat. In the presence of high transistor density this translates to calculation errors as well as hardware failure. In turn, high heat requires cooling systems and more electricity. Indeed, electricity is the largest operating expense for a data centre. In 2025 Equinix facilities consumed 8.6 Terawatt hours. A good guess is that at least 60% of the firm's cost of revenues is power. In 2025 the Equinix cost of revenue totalled $4.5 billion so power costs were at least $2.7 billion. In contrast, photonic computers uses infrared lasers on chips. This consumes a fraction of the power that silicon wafers need. Residual heat is minuscule so the cooling demand drops substantially...