Coherent (COHR) Q3 2026: Data Center and Comms Surge to 75% of Revenue as Indium Phosphide Capacity Doubles
Coherent’s Q3 marked a pivotal inflection as data center and communications now comprise 75% of revenue, with record backlog and accelerating visibility into 2028. The company’s rapid indium phosphide capacity expansion, NVIDIA partnership, and new multi-rail and thermal solutions are layering future growth vectors atop already surging demand. Management’s tone and guidance reinforce a multi-year runway, but investors should track margin execution and capacity allocation as industry constraints persist.
Summary
- Record Backlog Extends Demand Visibility: Orders now reach into 2028, underpinned by long-term agreements.
- Manufacturing Scale Unleashes Growth: Accelerated indium phosphide ramp drives both revenue and margin upside.
- Growth Vectors Multiply: CPO, multi-rail, and thermal solutions set up incremental revenue streams into 2027 and beyond.
Business Overview
Coherent is a global photonics technology leader, supplying optical components, modules, and subsystems that enable high-speed data center, communications, and industrial applications. The company’s business model centers on designing and manufacturing advanced photonic devices—like transceivers, lasers, and co-packaged optics (CPO)—that power AI data centers and telecom networks. Its major segments are Data Center and Communications (now 75% of revenue), and Industrial, with the former driving current growth through demand for bandwidth, energy efficiency, and next-generation networking architectures.
Performance Analysis
Coherent delivered a step-change quarter, with revenue growth accelerating both sequentially and year-over-year, and gross margin continuing its multi-quarter expansion. The Data Center and Communications segment was the primary engine, growing over 40% YoY and now comprising three-quarters of total revenue. Data center revenue alone rose 13% sequentially and 37% YoY, while communications revenue surged 16% sequentially and 60% YoY, reflecting broad-based demand across customers and product lines.
Gross margin improvement was driven by cost reductions from the six-inch indium phosphide ramp, yield gains, and pricing optimization. Operating leverage amplified bottom-line growth, with non-GAAP EPS up 55% YoY, outpacing revenue. The company’s capital allocation focused on expanding internal capacity and R&D for growth levers like transceivers, CPO, and OCS (optical circuit switches), while debt reduction and a $2B NVIDIA equity investment strengthened the balance sheet.
- Data Center and Comms Dominate Mix: These segments’ combined share reached 75%, with accelerating growth and backlog conversion.
- Indium Phosphide Ramp Unlocks Output: Internal capacity doubling ahead of plan, alleviating industry constraints and supporting margin expansion.
- Backlog and LTAs Extend Visibility: Orders and long-term agreements now stretch into 2028, supporting sustained growth guidance.
Industrial remains a smaller contributor, but early signs of recovery in semiconductor capital equipment and new AI thermal solutions offer incremental tailwinds. The company’s operating model is now tightly aligned to AI infrastructure demand, but future margin expansion will hinge on continued execution in capacity scaling and cost discipline.
Executive Commentary
"We are at the center of an extraordinary expansion in optical networking infrastructure, driven by the rapid growth of AI and the increasing need for bandwidth and energy efficiency. As a result, we delivered another quarter of strong financial performance with accelerating growth, expanding margins, and improving profitability. Importantly, we are seeing continued strengthening in demand across our business. This quarter, we experienced another step function increase in our order book, driving our backlog to a record level."
Jim Anderson, Chief Executive Officer
"We have strategically increased our capital investments to expand internal capacity in support of the rapidly growing demand in data center and communications. In addition, we also continued to strengthen our balance sheet, reducing our debt leverage ratio to below one time."
Sherry Luther, Chief Financial Officer
Strategic Positioning
1. Indium Phosphide Capacity Expansion
Doubling internal six-inch indium phosphide output ahead of schedule is a cornerstone differentiator. This substrate enables high-performance lasers and modulators essential for next-gen transceivers and CPO. Management expects to quadruple capacity by end of 2027, with three global sites (Texas, Sweden, Zurich) supporting yield and scale. This unlocks both revenue and margin upside as cost per device drops and output accelerates.
2. Multi-Layered Long-Term Agreements (LTAs)
Coherent’s backlog now extends into 2028, anchored by multi-year LTAs with hyperscalers and system customers. These contracts typically include upfront customer investment for capacity, supply commitments, and minimum demand guarantees, providing visibility and capital support for expansion. The NVIDIA partnership is the flagship, but management signals more LTAs are imminent, broadening the demand base and diversifying risk.
3. Growth Vectors: CPO, OCS, and Multi-Rail
Co-packaged optics (CPO) is positioned as a transformative $15B+ addressable market, with initial scale-out revenue starting in 2H26 and scale-up in 2H27. The NVIDIA deal includes both equity and multi-year supply for multiple CPO products. OCS (optical circuit switches) and multi-rail systems are also ramping, with OCS benefiting from recent bottleneck removal and multi-rail expected to generate revenue in early 2027. These new platforms diversify growth beyond traditional transceivers.
4. AI Data Center Thermal Solutions
Industrial segment innovation is being repurposed for AI data centers, with proprietary Thermadite cooling materials and thermoelectric generators targeting power and heat challenges. These solutions, unique to Coherent, promise higher chip utilization and energy recovery, with revenue expected in late 2027 and strong customer engagement underway.
5. Margin Expansion Playbook
Gross margin is being driven by yield improvements, cost reductions from new substrate scale, and pricing optimization, especially as new product generations (800G, 1.6T) command higher ASPs. The company targets >42% gross margin, with current progress supported by both operational leverage and strategic product mix.
Key Considerations
Coherent’s Q3 demonstrated the company’s ability to translate surging AI infrastructure demand into both top-line and bottom-line momentum, but several strategic levers and watchpoints remain in focus:
Key Considerations:
- Capacity Allocation Discipline: Management prioritizes indium phosphide output for the highest margin dollar opportunities, balancing transceivers, CPO, and new systems.
- LTAs as a Demand Anchor: Upfront customer investments and minimum volume commitments reduce risk, but execution on new agreements is critical for sustained growth.
- Margin Expansion Still Early: While gross margin has improved, most six-inch cost benefits are ahead, and further expansion depends on scaling and operational execution.
- Industrial Segment as Optionality: Early recovery in semiconductor capex and new thermal products could diversify revenue, but scale and timing remain uncertain.
- Pricing Power and Supply Chain Control: Healthy pricing dynamics and high internal sourcing buffer against component inflation, supporting margin resilience.
Risks
Execution risk on capacity expansion remains central, as industry-wide indium phosphide constraints could re-emerge if ramp targets slip. Gross margin progress, while positive, is still in early innings, and depends on both yield and cost discipline as new products scale. Competitive intensity in CPO and OCS, as well as customer concentration in hyperscalers, could introduce volatility. Macro cycles in industrial and telecom markets may temper diversification efforts.
Forward Outlook
For Q4 2026, Coherent guided to:
- Revenue of $1.91B to $2.05B
- Non-GAAP gross margin of 39% to 41%
- Non-GAAP EPS of $1.52 to $1.72
For full-year 2026, management maintained a view of accelerating revenue growth into fiscal 2027, with data center and communications as primary drivers. Key factors highlighted include:
- Strong backlog and bookings visibility through 2028
- Continued ramp of six-inch indium phosphide capacity and new product platforms
- Incremental revenue from CPO, OCS, multi-rail, and thermal solutions beginning in late 2026 and 2027
Takeaways
Coherent’s quarter cements its role as a critical AI infrastructure enabler, with supply chain scale and long-term agreements underpinning multi-year growth. Investors should focus on:
- Backlog and Capacity as Growth Levers: Record orders and accelerated capacity expansion support sustained revenue and margin upside, but require flawless execution.
- Product Mix and Margin Trajectory: The shift to higher-value platforms (CPO, OCS, multi-rail) and pricing power are key to achieving targeted margin expansion.
- Future Watchpoints: Track the pace of six-inch ramp, new LTA signings, and early revenue contributions from multi-rail and thermal solutions as signals of execution depth.
Conclusion
Coherent’s Q3 results reflect a business in acceleration mode, with AI-driven demand, record backlog, and capacity expansion converging to create a visible runway. The company’s ability to execute on its multi-pronged growth and margin strategy will determine whether it can sustain its market leadership and value creation through the next cycle.
Industry Read-Through
Coherent’s results affirm the structural AI data center buildout as a durable multi-year theme, with optical networking and photonics now mission-critical for hyperscalers and cloud providers. The company’s ability to secure long-term agreements and upstream customer investment signals a shift toward tighter supply chain integration across the sector. Competitors in optical, substrate, and advanced packaging must accelerate capacity plans or risk share loss, while equipment and material vendors should expect continued capital intensity from leading photonics players. The industrial segment’s pivot to data center thermal management also highlights emerging cross-sector opportunities as AI infrastructure scales in complexity and energy demand.