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Silicon photonics investment grows as AI clusters outgrow copper wiring
The article says copper links degrade at high signaling speeds in under a meter, and longer runs increase power and heat as engineers hit what it calls a copper wall.
AI clusters are expanding to tens and hundreds of thousands of processors, and the bottleneck is shifting from compute to data center connectivity, with copper wiring increasingly struggling to handle modern signaling demands, The Motley Fool reports via Yahoo Finance.
According to the article, at today’s blistering signaling speeds, passive copper can carry a clean signal for less than a meter before degrading. It adds that extending copper runs forces higher power to preserve data integrity, which increases heat and raises energy bills.
The piece describes a physical limit for large, warehouse scale clusters, calling it a copper wall, where engineers cannot simply add more copper. It argues that silicon photonics can send information as pulses of light through fiber instead of electrons through metal, which it says enables longer reach, more data capacity, and lower power over distance.
It also highlights co-packaged optics, in which optical components are built next to the switch chip rather than at the edge of a box. The article says that integration reduces power lost in translation and packs more bandwidth into the same space, leaving copper for shorter hops inside a package.
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