7 May 2026

Coherent Hits Record Backlog and Eyes Capacity Quadrupling as AI Networking Demand Extends to 2028

Q3 Fiscal 2026 Earnings Call, May 6, 2026

Coherent Corp. delivered its strongest quarterly revenue on record at $1.8 billion in its fiscal third quarter, up 9% sequentially and 27% year-over-year on a pro forma basis, as demand from AI data center buildouts continues to outpace the company's ability to supply. The headline number, however, understates the shift in visibility that management communicated: orders are now reaching into calendar 2028, and long-term agreements with customers now extend to the end of the decade. CEO Jim Anderson described the June quarter as "a new inflection point in our revenue growth rate moving forward," with fiscal 2027 growth expected to exceed fiscal 2026's already accelerating pace.

Indium Phosphide Capacity: The Constraint That Is Becoming a Moat

The single most consequential operational development from this call is the ahead-of-schedule ramp of Coherent's 6-inch indium phosphide production platform. The company had targeted doubling internal indium phosphide output by year-end but now expects to hit that milestone one quarter early, meaning next quarter. More significantly, Anderson guided investors to expect another doubling of that already-doubled capacity by the end of calendar 2027, implying a roughly fourfold expansion of internal indium phosphide capacity over a two-year window.

The economics of this transition are compelling. Anderson was explicit: "6-inch versus 3-inch is more than 4x as many devices at less than half the cost." Yields on the 6-inch lines are already exceeding those on the legacy 3-inch production lines across all three device categories — EMLs, CW lasers, and photodiodes — a result Anderson described as exceeding internal expectations. The first transceivers containing 6-inch-produced components shipped in the March quarter, contributing to both sequential revenue growth and a 57 basis point improvement in non-GAAP gross margin to 39.6%.

Coherent is now running 6-inch production at its Sherman, Texas facility — described as "the world's most advanced indium phosphide production site" — and at a second site in Sweden, with a third site in Zurich announced and expected to come online at the start of calendar 2027. CFO Sherri Luther noted that because 100% of the incremental capacity being added is 6-inch, the company will exit this calendar year with roughly half of total indium phosphide capacity on the lower-cost platform. That crossover point suggests gross margin benefits from this transition are still materially ahead. Luther confirmed the company's Investor Day target of greater than 42% non-GAAP gross margin remains firmly in place, noting that gross margin has expanded in seven of the past eight quarters for a cumulative gain of approximately 530 basis points, with the June quarter guidance midpoint taking that figure toward 570 basis points.

Revenue Guide Points to Sharper Acceleration

For the fiscal fourth quarter ending June 2026, Coherent guided revenue of $1.91 billion to $2.05 billion, implying sequential growth of roughly 6% to 14% at the midpoint — a meaningful step up from the 7% sequential gain posted in Q3. Non-GAAP EPS guidance of $1.52 to $1.72 compares to $1.41 in Q3, continuing a pattern where earnings growth significantly outpaces revenue growth. Year-over-year non-GAAP EPS growth was 55% in Q3, versus 27% revenue growth on the same pro forma basis, illustrating the operating leverage beginning to flow through.

Capital expenditures surged to $290 million in Q3 from $154 million in Q2 and $112 million a year ago, and management guided for further sequential increases in Q4. The company's cash position jumped to $3 billion from $1.5 billion, largely reflecting the $2 billion equity investment from NVIDIA announced in March. Debt leverage collapsed to 0.5x from 1.7x in Q2 and 2.1x a year ago, providing the balance sheet flexibility needed to sustain this capital investment pace.

Data Center: 800G Holds, 1.6T Ramping Faster Than Expected

Data center revenue grew 13% sequentially and 37% year-over-year in Q3, the second consecutive quarter of double-digit sequential gains. Management guided for further acceleration in Q4, driven by both 800G transceivers and 1.6T, with Anderson noting that the 1.6T ramp is "actually faster than what we would have thought, say, a year ago." He added that 800G revenue is expected to grow in calendar 2026 and likely again in calendar 2027, dispelling any thesis that the transition to higher speeds represents a meaningful revenue cliff in the near term. The growth is additive, not substitutive, at least for the foreseeable future.

On the mix between EML and silicon photonics-based 1.6T transceivers, Anderson was deliberately technology-agnostic, noting that both require CW lasers based on indium phosphide, making the gross margin profile broadly similar regardless of the underlying photonic architecture. Coherent is ramping both in parallel based on customer application requirements. At OFC, the company also demonstrated 400-gig silicon photonics capable of enabling 3.2T platforms, and Anderson confirmed development is underway on 400-gig VCSELs as well, positioning Coherent across multiple technology paths for the next generation of speed transitions.

OCS and the Bottleneck That Was Resolved

Optical Circuit Switching revenue is expected to grow sequentially in the current quarter after Coherent resolved what Anderson described as a production bottleneck tied to internally manufactured components. "We were able to sort of dramatically improve the amount of internal components that we were producing," he said, characterizing the last month or two as a period of meaningfully accelerated production pace across two manufacturing sites running in parallel. The company has now raised its OCS market size estimate to over $4 billion, up from a prior figure, reflecting expanding use cases across data center interconnect, scale-out, and scale-up networks.

CPO: NVIDIA Is the Lead, But the Pipeline Is Broader

The NVIDIA partnership — a $2 billion equity investment paired with a multiyear supply agreement through the end of the decade covering multiple CPO-related products — remains the most visible anchor for Coherent's co-packaged optics ambitions. But Anderson was careful to frame NVIDIA as the lead customer within a broader engagement set. "We're engaged with multiple different customers. It's actually a pretty wide set of customers," he said, noting CPO commitments span both hyperscalers and system manufacturers.

The revenue timeline is concrete: initial scale-out CPO revenue is expected to begin ramping in the second half of calendar 2026, with scale-up CPO revenue following in the second half of calendar 2027. Coherent's CPO value proposition extends well beyond the high-power CW laser, encompassing external laser source modules, fiber attach units, micro-lens arrays, polarization maintaining fiber, isolators, and thermoelectric coolers — essentially the full optical assembly stack. Anderson sized the total CPO addressable market at over $15 billion, a figure he called "probably a conservative estimate," and framed it as the most important long-term growth opportunity for the company. Capacity for CPO-related CW laser production is being supported in part by the Sherman, Texas 6-inch ramp.

Communications: 60% Year-Over-Year Growth and Multi-Rail on the Horizon

Communications segment revenue grew 16% sequentially and 60% year-over-year in Q3, with strong momentum across ZR and ZR+ transceivers, DCI solutions, pump lasers, line cards, amplifiers, and full transport systems. Anderson identified a new product category called multi-rail as the next significant revenue vector in this segment, with initial revenue expected in the first half of calendar 2027. He sized the multi-rail market at "at least $2 billion over the coming years" and highlighted proprietary component technology — detailed at OFC — as the basis for differentiated competitive positioning. The product addresses bandwidth and connectivity demands for AI workloads distributed across multiple physical data center locations.

Industrial: Soft but Watching Semcap Equipment Recovery

Industrial segment revenue declined modestly both sequentially and year-over-year, continuing to reflect weakness in broader industrial end markets. However, management highlighted a meaningful uptick in bookings within semiconductor capital equipment, with that improvement expected to begin converting to revenue in the current quarter. Longer term, Coherent is pursuing two entirely new industrial-derived revenue streams targeted at AI data center infrastructure: Thermadite-based thermal management solutions and thermoelectric generators for waste heat recovery. Anderson described Thermadite as a proprietary material capable of delivering two to five times better thermal conductivity than copper-based solutions, effectively enabling higher XPU utilization rates. Revenue from both thermal products is expected to begin in the second half of calendar 2027.

LTA Structure and Customer Commitment Depth

Coherent is in the process of finalizing additional long-term supply agreements beyond the NVIDIA deal, with management indicating at least several were signed in Q3 and more expected to close imminently. Anderson described a consistent three-part structure across these agreements: an upfront capital contribution from the customer to support capacity expansion, a supply commitment from Coherent, and a minimum demand commitment from the customer to ensure capacity utilization. "Almost every LTA has those 3 parts in it," he said, framing the upfront customer contributions as "skin in the game." The counterparties span both hyperscalers and systems manufacturers, and agreement durations extend in some cases to the end of the decade.

Pricing Dynamics and the Internal Supply Buffer

On transceiver pricing, Anderson characterized the environment as "very healthy" given the persistent supply-demand imbalance, with ASPs stepping up naturally as customers adopt higher-speed data rates. Critically, the majority of optical components going into Coherent's transceivers are internally sourced, insulating the company from external component price inflation. Where external sourcing is used, Coherent has successfully passed through higher costs or offset them with internal production efficiencies. The net result is that gross margin improvement has been concentrated precisely in the data center and communications business — the fastest-growing and most strategically important segment.

PRO Investment deep dive

Coherent Corp. Deep Dive

Business Model and Value Proposition

Coherent Corp. operates as a vertically integrated manufacturer of optoelectronic components, advanced materials, and laser systems. Under the stewardship of CEO Jim Anderson, the company has ruthlessly streamlined its operations into two core segments starting in fiscal 2026: Datacenter and Communications, and Industrial. The fundamental economic engine of the business is driven by the production of high-speed optical transceivers and the underlying electro-absorption modulated lasers (EMLs) that power artificial intelligence datacenter interconnects. Beyond networking hardware, the company engineers advanced optical circuit switches and specialized optoelectronic materials, most notably through its Silicon Carbide subsidiary. The business model generates value through deep vertical integration. By owning the complex materials science at the base of the supply chain—specifically Indium Phosphide wafer fabrication—Coherent extracts superior structural margins in a hardware sector that traditionally suffers from commoditization.

Customers, Competitors, and the Value Chain

The value chain for optical networking is heavily bifurcated between fundamental component manufacturers and module assemblers. Coherent is one of the few entities that straddles both. Its ultimate end-customers are the hyperscale cloud providers—Microsoft, Google, Meta, and Amazon—as well as the dominant silicon architect, NVIDIA. In the optical transceiver module market, Coherent competes fiercely with Chinese module integrators Innolight and Eoptolink, as well as domestic peers Lumentum and Applied Optoelectronics. The competitive dynamic is structurally complex: while the Chinese integrators dominate the final module assembly layer with aggressive pricing, Coherent supplies the foundational EML laser chips to the open market while simultaneously consuming them internally for its own pluggable modules. On the materials front, the Silicon Carbide subsidiary, which secured a $1 billion capital injection from DENSO and Mitsubishi Electric in late 2023 for a combined 25 percent stake, supplies specialized automotive and industrial clients, competing directly against Wolfspeed and ON Semiconductor.

Market Share and Industry Dynamics

The optical transceiver market is undergoing an unprecedented structural expansion, catalyzed by the architectural bandwidth requirements of generative AI training clusters. The total addressable market is projected to reach $26 billion in 2026, representing a massive acceleration from historical baseline growth. A single AI training cluster now demands more east-west network bandwidth than entire regional datacenters required five years ago. Market share in module assembly is heavily concentrated geographically, with Chinese manufacturers Innolight and Eoptolink capturing roughly 60 percent of NVIDIA's 800G incremental order volume. Coherent and Lumentum secure the remaining 40 percent, heavily favored by Western buyers seeking supply chain diversification and insulation from geopolitical friction. The industry is currently executing the fastest generational transition in its history, moving from 800G to the 1.6T module cycle. While Asian assemblers command significant initial 1.6T module qualifications, Coherent controls the upstream supply chokepoint by fabricating the 200G-per-lane EML chips required to make 1.6T architectures a physical reality.

Competitive Advantages

Coherent's primary competitive moat is defined by its materials science legacy, specifically its migration to 6-inch Indium Phosphide wafer manufacturing. EML laser capacity remains the binding constraint in the global high-speed optical supply chain. Competitors relying on legacy 3-inch wafers face severe yield and throughput limitations. Coherent's transition to 6-inch Indium Phosphide wafers yields four times the chip count at less than half the unit cost. This translates into a structural cost wedge that module-only assemblers simply cannot replicate. This manufacturing advantage is highly defensible due to the intense capital requirements, steep yield-learning curves, and specialized fabrication footprint required to accurately manipulate Indium Phosphide at scale. The financial manifestation of this moat is evident in the company's gross margin profile, which has steadily expanded toward the 40 percent threshold in early 2026 as higher-priced 800G and 1.6T modules command a significantly larger share of the revenue mix.

Opportunities and Threats

The most immediate opportunity lies in supplying the optical infrastructure required for the rapid scale-up of AI compute fabrics. Generational upgrades from 800G to 1.6T transceivers command massive average selling price premiums and provide multi-year revenue visibility. Furthermore, the company's Silicon Carbide business—while recently navigating an electric vehicle cyclical downturn—provides embedded optionality as it transitions toward 300mm substrate platforms tailored for high-density AI datacenter thermal management and power conversion applications. The primary threat to Coherent is the inherent cyclicality of datacenter capital expenditures. While current visibility is exceptional, any macroeconomic moderation in AI training buildouts would expose the company to significant operating deleverage. Furthermore, Chinese module assemblers continue to execute flawlessly on design wins, pressuring Western transceiver margins. If Coherent fails to maintain its materials technology lead, it risks being marginalized into a pure component supplier to lower-cost integrators.

New Technologies and Disruptive Vectors

The looming architectural disruption in datacenter interconnects is the transition from traditional pluggable optics to Co-Packaged Optics. As interface speeds scale beyond 3.2T, standard pluggable modules approach insurmountable physical thermal limits. In March 2026, NVIDIA announced a $2 billion strategic investment into Coherent, designed explicitly to fund Co-Packaged Optics manufacturing capacity. This capital uniquely positions Coherent as the foundational optical engine supplier for NVIDIA's Spectrum-6 switching platform and NVL1152 supercomputer architectures. The initial wave of scale-out revenue is slated for the second half of 2026, with higher-margin scale-up volume scheduled for 2027. Coherent has effectively doubled its serviceable addressable market projection for this technology to $15 billion. The primary execution risk is internal cannibalization; accelerating the roadmap inevitably compresses the lifecycle of Coherent's highly profitable pluggable transceiver business. However, successfully executing this transition alongside NVIDIA ensures the company remains the indispensable photonic layer of the infrastructure stack.

Management Track Record

CEO Jim Anderson's tenure since June 2024 has been a clinical exercise in capital allocation and operational focus. When Anderson inherited the entity—which was created via II-VI Incorporated's highly leveraged 2022 acquisition of the legacy Coherent business—the balance sheet was severely constrained by debt. Management aggressively optimized the portfolio, divesting low-margin, non-core assets including the Aerospace and Defense unit in late 2025 and the Munich product division in early 2026. The proceeds were methodically routed to debt reduction. Combined with the late 2025 conversion of Series B preferred shares to common equity, these actions drastically deleveraged the balance sheet, dropping EBITDA leverage toward a highly manageable 2.1x. The corporate reorganization from three segments into just two eliminated bureaucratic bloat and directed all available capital toward high-return optical capacity expansions. Anderson has successfully transformed a heavily indebted, unwieldy materials conglomerate into a focused, margin-expanding pure-play on network infrastructure.

The Scorecard

Coherent stands as an indispensable supplier in the global AI hardware ecosystem, uniquely positioned by its Indium Phosphide manufacturing footprint. The company has capitalized on the explosive demand for 800G and 1.6T transceivers by maintaining a stranglehold on the foundational laser components that govern the entire optical supply chain. The strategic pivot away from low-margin legacy businesses, paired with massive deleveraging efforts under the current executive team, has engineered a dramatic expansion in both operating margins and free cash flow generation. The recent multibillion-dollar capital infusion from NVIDIA validates the company's technology roadmap and locks in an elite tier-one customer for the next computing generation.

The structural risks are firmly tied to the sustainability of hyperscaler capital expenditures and aggressive assembly market share gains by low-cost competitors. Should the AI cluster build-out sequence face an unexpected pause, Coherent's aggressive capital expenditures into 6-inch wafer capacity could rapidly transition from a competitive moat to a fixed-cost anchor. Nevertheless, the company's vertical integration, dominant materials science capabilities, and early traction in the looming transition away from pluggable optics provide a highly defensive and structurally superior posture within the semiconductor capital equipment landscape.