AI's Ceiling Isn't Compute. It's Glass.

Every AI capacity debate of the past two years has fixed on one resource: GPUs. Ciena's fiscal third-quarter earnings call pointed at a different constraint entirely. Revenue reached $1.67 billion, up 37 percent year over year and a company record. Backlog climbed to $8.5 billion, and management guided to more than $10 billion by the close of fiscal 2026.