AI Chips Are Getting Faster. Why Are Data Centers Spending Billions Replacing Copper Cables?
AI data centers are investing in optical technology to replace copper cables, as faster processors create bottlenecks. Coherent, an optical tech manufacturer, reported a 50% YoY revenue increase, with its Data Center & Communications segment growing 79% YoY to $1.95B. The shift is driven by the need for faster data transfer in large AI clusters, though copper remains cost-effective for short distances.
How this was made

The 30-second read
Why it matters
Coherent's earnings beat and strong guidance may trigger a rally in related hardware stocks and reinforce the trend toward optical solutions.
Market read
First‑time earnings disclosure for a major optical component supplier, likely to move its stock and influence the AI‑infrastructure sector.
What to watch
Potential supply‑chain constraints for fiber components and competition from emerging silicon‑photonic solutions.
Background
The article discusses the growing need for optical networking in AI data centers and Coherent's role as a supplier.
Ticker impact
Coherent reported Q4 results with $2.37 B revenue, 79% growth YoY, driving a 50% stock jump.
likely upside as the market prices in the revenue surge and growth outlook
First‑time disclosure of a large‑scale earnings beat and guidance above expectations typically fuels buying pressure.
Market effects
Highlights accelerating shift to optical interconnects in AI data centers, benefiting optical component suppliers.
U.S. tech sector may see a modest boost as investors rotate into hardware infrastructure names.
Signals broader industry trend that could influence global AI‑infrastructure spending patterns.
Counterpoint
If optical component costs remain high, margins could compress, limiting upside despite revenue growth.
Key entities
- companyCoherent
Optical technology manufacturer reporting strong Q4 results.




