Caltech’s New Chip Mimics Fiber‑Optic Speed, Boosting Everything From Lasers to Data Centers

Caltech researchers have engineered a silicon‑based optical pathway that loses almost no light—matching the ultra‑low loss of traditional fiber‑optic cables, even at visible wavelengths. By etching microscopic waveguides directly onto silicon chips, the team achieved transmission efficiency previously thought possible only in glass fibers. This breakthrough could supercharge a range of technologies: lasers become brighter and more compact, atomic clocks and sensors shrink to pocket size, and quantum‑information devices gain the low‑noise channels they need to scale. Data centers stand to reap huge energy savings, as light can now travel across chips with far less power than electrical signals. The work builds on five years of incremental advances, and the scientists stress it’s a stepping stone rather than a final product. “We haven’t gone as far as we want to go, but we’ve made significant progress over the last five years,” said lead researcher Kerry Vahala. With further refinements, the silicon‑on‑chip platform could become the backbone of next‑generation computing, communications, and precision‑measurement systems.

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