NVIDIA and AI scale drive Coherent to new highs
- Coherent is now mainly an AI optical networking supplier, with Datacenter & Communications at 79% of Q4 FY2026 revenue.
- The NVIDIA deal adds a multi-year purchase commitment and a $2 billion equity investment.
- Datacenter revenue grew 66% year over year in Q4 FY2026, accelerating from earlier quarters.
- The company reported its first $2 billion revenue quarter and guided for a $3 billion quarter by the end of fiscal 2027.
- The bear case is concentration. The company is heavily tied to NVIDIA, AI spending, and a pricey growth story.
AI optics scaling rapidly
Coherent has become a major supplier of the physical parts that move data inside AI datacenters. Its optical transceivers and related components help servers send huge amounts of information at high speed. A massive strategic agreement with NVIDIA cemented this role with purchase commitments and a $2 billion equity investment.
The latest results validate the bull case. In Q4 FY2026, Datacenter revenue jumped 66% year over year. The Datacenter & Communications segment now makes up 79% of the business. The company hit its first $2 billion revenue quarter and laid out a clear path to $3 billion per quarter by late fiscal 2027. Crucially, the internal 6-inch indium phosphide production is scaling faster than expected with strong yields, structurally lifting profit margins.
The hard part is that the good news also raises the risk. Coherent is overwhelmingly exposed to one customer relationship and one spending cycle. If AI datacenter orders slow, if NVIDIA changes plans, or if the Industrial segment remains stagnant, total company growth could freeze.
Investors are paying for immense AI success. Over the next year, the key tests are launching new products like PhotonLink, continuing to expand gross margin past 42%, managing the NVIDIA capacity ramp, and finding clarity on the outstanding BIS inquiry.
Hard parts made at scale
Coherent makes advanced materials, optical components, and lasers. Many of these products are hard to build because they need precise materials science, such as silicon carbide, gallium arsenide, and indium phosphide. That difficulty is part of the competitive advantage.
The company sells directly to large equipment makers, system builders, and end customers. In AI datacenters, its value comes from helping data move quickly between chips, servers, and racks. In industry, its lasers and materials help with manufacturing, displays, power electronics, and other specialized uses.
The model works best when factories run at high volume and yields improve, as seen with the recent 6-inch indium phosphide ramp. It can break when demand falls quickly, when a large customer cuts orders, or when Coherent has to spend heavily on capacity before the orders produce enough profit.
Starting in fiscal 2026, Coherent reorganized into two segments. The Datacenter & Communications segment has quickly overshadowed the Industrial segment, fundamentally changing the company profile.
What Coherent sells
Datacenter optical transceivers
These pluggable modules move data through AI and cloud datacenters. They are the primary driver of current explosive growth.
Telecom optical components
Coherent sells fiber optics, pump lasers, amplifiers, and wavelength selective switches for land and submarine networks. This adds communications demand beyond AI datacenters.
Engineered materials
The company makes silicon carbide substrates, laser optics, and specialty materials like thermodynamic XPU cooling solutions.
Semiconductor lasers
Coherent sells high-power semiconductor lasers such as VCSELs and edge-emitting lasers. These feed into sensing, communications, and manufacturing uses.
Industrial and display lasers
The lasers business includes excimer, CO2, solid-state, and ultrafast lasers. These tools are used in OLED display production, precision manufacturing, and research.
Externally funded R&D
Coherent earns revenue from funded research and development work. This can help support future products.
A concentrated AI story
Mix is from Q4 FY2026, the quarter ended June 30, 2026. Datacenter & Communications accounted for 79% of total revenue, confirming the extreme shift toward AI datacenter dependency.
What could break the thesis
NVIDIA concentration
High impact · Medium oddsThe NVIDIA agreement gives Coherent a clearer demand runway, but it also raises customer concentration. If NVIDIA slows purchases, shifts designs, or pushes harder on price, Coherent could lose growth and margin at the same time.
AI buildout slowdown
High impact · Medium oddsCoherent is more exposed to the AI datacenter cycle than ever. Future AI software or hardware could require less computing power, which could lower demand for the optical gear that drives growth today.
Margin and capex squeeze
High impact · Medium oddsThe NVIDIA ramp requires heavy spending on manufacturing capacity and research. If costs arrive before revenue, or if yields disappoint, the structurally improving gross margin may reverse.
BIS inquiry on Huawei sales
Medium impact · Medium oddsCoherent disclosed a U.S. Bureau of Industry and Security inquiry in January 2025 tied to past Huawei sales. An adverse result could bring penalties or limits that hurt finances and investor trust.
Debt limits flexibility
Medium impact · Medium oddsCoherent still carried about $3.2 billion of debt as of March 31, 2026. Debt matters more if the cycle turns, because interest and repayment needs can limit spending on growth, restructuring, or buybacks.
Industrial stagnation
Medium impact · Medium oddsIndustrial revenue was roughly flat in Q4 FY2026. That makes the remaining company cleaner, but also completely dependent on AI demand to fuel overall growth.
In one breath
Why is Coherent linked to AI?
AI datacenters need fast optical connections to move data between chips, servers, and racks. Coherent sells optical transceivers and related parts used in that network.
What did NVIDIA do with Coherent?
In March 2026, Coherent entered a multi-year strategic agreement with NVIDIA for advanced optics technology, manufacturing capacity, and research and development. NVIDIA also made a $2 billion equity investment.
Is Coherent only an AI company now?
No. It still sells industrial lasers, engineered materials, telecom parts, and specialty components. However, in Q4 FY2026, Datacenter & Communications grew to 79% of total revenue.
What is the biggest risk for COHR stock?
The biggest risk is that expectations are high while the business is becoming more concentrated. A slowdown in AI datacenter spending, a weaker NVIDIA relationship, or lower margins could hurt the stock.
Sources and research notes
This page combines Finn's company research with public filings and other cited materials. The thesis is reviewed when material company information changes; Finn Scores use the latest available scoring data.
- Thesis reviewed
- August 30, 2026
- Score data
- September 6, 2026
- Reviewed by
- Shivam Bharuka
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