This Computer Uses Light – Not Electricity – To Train AI Algorithms

William Andregg ushers me into the cluttered workshop of his startup Fathom Computing and gently lifts the lid from a bulky black box. Inside, green light glows faintly from a collection of lenses, brackets, and cables that resemble an exploded telescope. It’s a prototype computer that processes data using light, not electricity, and it’s learning to recognize handwritten digits. In other experiments the device learned to generate sentences in text.

https://www.wired.com/story/this-computer-uses-lightnot-electricityto-train-ai-algorithms/