AXT vs. Coherent: Which Photonics Chip Supplier Looks Like the Stronger Buy as AI Data Center Demand Accelerates

AXT and Coherent are both gaining investor attention as demand for photonics, optical networking, and AI data center infrastructure continues to rise. A recent Zacks analysis compared the two companies and concluded that AXT currently has the stronger near-term investment profile, helped by its earlier-stage growth opportunity and its Zacks Rank #2 “Buy” rating, while Coherent carries a Zacks Rank #3 “Hold.”

AI Is Pushing Photonics Into the Spotlight

The rapid growth of artificial intelligence is creating a major need for faster data movement inside and between data centers. Traditional copper-based connections are struggling to keep up with the power, speed, and distance requirements of advanced AI systems. That is why photonics, which uses light to move information, has become one of the most important technology themes in the semiconductor supply chain.

Optical transceivers, lasers, indium phosphide components, and photonic integrated circuits are now seen as critical building blocks for cloud providers and hyperscalers. Research firm IDTechEx expects the photonic integrated circuit and silicon photonics market for optical transceivers and quantum technologies to reach about $50 billion by 2036, supported by strong long-term growth in AI, high-performance computing, and data communications.

Why AXT Is Getting Fresh Attention

AXT is a smaller supplier focused on compound semiconductor substrates, including materials used in high-speed optical and electronic applications. Because it sits earlier in the supply chain, the company may benefit when demand rises for photonics chips, lasers, and advanced connectivity components.

The key point in the Zacks comparison is that AXT appears to offer more upside leverage to the optical networking cycle. In simple terms, AXT may have more room to grow if demand for photonics components keeps expanding. Its smaller size can make the stock more volatile, but it can also create greater percentage upside when industry momentum improves.

Coherent Remains a Larger and More Established Player

Coherent is much larger and more diversified. The company produces lasers, optical systems, transceivers, materials, and networking solutions that directly support AI data centers and industrial markets. Its scale, customer relationships, and broad technology base make it an important name in photonics.

Coherent also received a major boost from the AI infrastructure theme after Reuters reported that Nvidia planned large investments in Coherent and Lumentum to support advanced photonic technologies for faster AI processors and data center systems.

Which Stock Looks Better Right Now?

Based on the Zacks view, AXT looks like the more attractive near-term pick because it currently holds a stronger stock rating and may be earlier in its growth curve. Coherent remains a high-quality photonics leader, but its larger size and recent share strength may limit its upside compared with a smaller supplier like AXT.

That does not mean Coherent is weak. In fact, Coherent may be better suited for investors who prefer a larger, more established company with broad exposure to lasers, optical communications, and AI infrastructure. AXT, meanwhile, may appeal more to investors looking for a higher-risk, higher-reward opportunity tied to the next stage of photonics demand.

Investor Takeaway

The battle between AXT and Coherent shows how important photonics has become in the AI era. As data centers demand faster and more energy-efficient connections, companies across the optical supply chain could benefit.

For now, AXT appears to have the stronger buy case according to Zacks, while Coherent remains a major long-term player in the photonics market. Investors should still watch valuation, earnings trends, customer demand, and broader market risk before making any decision.

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