AI networking is entering the age of light. Yet one of the industry’s biggest semiconductor companies is still developing faster copper connections.
Why invest in copper when the future supposedly belongs to optics?
The answer reveals something easily missed in the race toward faster AI infrastructure: the most advanced network doesn’t necessarily use the most advanced connection everywhere.
Copper Isn’t Dead. Broadcom Is Making It Faster.
At OFC 2025, Broadcom demonstrated 200G-per-lane copper links and an 800G active electrical cable capable of extending beyond seven meters.
That is a surprising investment for an industry racing toward optical networking.
But copper has an advantage that optical systems cannot simply erase: over sufficiently short distances, it can deliver high bandwidth without the cost and power overhead of converting electrical signals into light.
NVIDIA’s interconnect specifications illustrate the trade-off. Its 800G/400G platforms support passive copper connections up to three meters, while optical links can extend hundreds of meters or more.
Copper wins where distance is short enough. Optics wins opportunities as that distance becomes harder to cross electrically.
And the boundary is changing.
The Real Competition Is Over Distance
As AI networking moves toward 200G-per-lane signaling, electrical losses become harder to manage. Longer copper paths may require additional signal conditioning, increasing power consumption and cost.
At some point, the supposedly cheaper connection stops being cheaper.
But there is no universal distance where optics suddenly becomes the better choice. The answer depends on bandwidth, cable design, power, cooling, and system architecture.
That explains why data centers can simultaneously invest in copper cables, active electrical connections, pluggable optics, and co-packaged optics.
They are not necessarily betting on competing futures. They are optimizing different parts of the same network.
The commercial consequence is more interesting than a simple copper-versus-optics rivalry.
As signaling speeds increase, the economically attractive reach of each technology can change—reshaping demand across cable manufacturers, optical suppliers, and semiconductor packaging companies.
The real question isn’t when optics will replace copper. It’s where copper stops making economic sense.
CONTINUE THE RESEARCH
TECH VISION MAGAZINE · AUGUST 11, 2026
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