Earnings Call Highlights: Coherent (COHR) | FY2026 Q4 — Quarterly Revenue Hits $2.05B, EPS Up 74%, and a "First $3B Quarter" Written into the 2027 Roadmap

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Coherent (COHR) reported FY2026 fourth-quarter results (quarter ended June 2026) on August 12 ET: quarterly revenue of $2.05B, up 42% YoY on a pro forma basis; non-GAAP EPS of $1.74, up 74% YoY; and full-year revenue above $7B for the first time. More importantly, management kept raising its tone. Beyond strong guidance, it gave a rare, explicit mid-term target: the first quarter with revenue above $3 billion before the end of FY2027. This article lays out the quarter's hard numbers, the real growth valve, and the next revenue streams about to ignite.

This article is for technology and industry trend analysis only and does not constitute investment advice.

The three most important takeaways this quarter

• Growth is not slowing; it is accelerating. Q4 pro forma revenue grew 42% YoY and 14% QoQ, faster than the 28% full-year pace. Management said plainly that demand shows "no signs of attenuation," orders now extend into 2028, and long-term agreements (LTAs) run through the end of the decade.

• Profit is growing faster than revenue. Full-year non-GAAP EPS rose 59%, more than twice the revenue growth rate; Q4 non-GAAP gross margin was 40.2% and operating margin 21.8%, while leverage was cut from 2.0x to 0.7x. This was a quarter of revenue surge, margin expansion, and deleveraging all at once.

• The valve is InP, not demand. The bottleneck in the whole growth story is not whether customers will buy, but how many indium phosphide (InP) lasers can be made. 6-inch InP capacity will double YoY this quarter, one quarter ahead of plan, and that determines transceiver shipments for every quarter ahead.

1. Revenue and financials

First, the hard numbers. Q4 revenue was $2.05B (GAAP actual), up 33.8% YoY (reported), up 42% YoY pro forma, and up 14% QoQ; full-year revenue was $7.12B, up 28% pro forma, Coherent's first fiscal year above $7B.

Profitability deserves even more attention. Q4 non-GAAP gross margin was 40.2%, up 215 bps YoY and 66 bps QoQ (GAAP gross margin 38.5%); non-GAAP operating margin jumped to 21.8%, up 381 bps YoY. Q4 non-GAAP net income was $351.2M, up about 83% YoY, and non-GAAP diluted EPS was $1.74, up 74% YoY and 23% QoQ (GAAP EPS $1.19). Full-year non-GAAP EPS was $5.61, up 59%; in management's own words, profit grew more than twice as fast as revenue.

By segment, Datacenter & Communications posted $1,615.0M for the quarter, 79% of total revenue, up 59% YoY and 19% QoQ; Industrial came in at $430.5M, roughly flat. That 79% says it clearly: Coherent is now essentially an AI optical interconnect company, with industrial in a supporting role.

Notably, margin expansion and deleveraging happened together: non-GAAP operating expenses were $377M this quarter, falling to 18.4% of revenue (20.1% a year earlier); leverage dropped from 2.0x in FY2025 to 0.7x for the full year, with $2.59B in cash at quarter end, while quarterly capex rose to $556M. Management stressed that data center investments have a payback period of only about 18 months, effectively trading high-certainty order visibility for future capacity.

2. Growth engine: Datacenter & Communications, and the valve called InP

Datacenter & Communications revenue grew 40% for the full year, with clear acceleration in Q4. Breaking it down further: the pure data center business grew 66% YoY and 24% QoQ in Q4, its third straight quarter of double-digit sequential growth; communications grew 56% YoY and 11% QoQ, with strength in DCI (data center interconnect) ZR/ZR+, pump lasers, and high-end optical subsystems. In transceivers, Coherent is capturing both 800G and 1.6T: 800G is still growing YoY in 2026, while 1.6T ramps quickly in the second half and extends into 2027. We broke down this "ZR as the meat, Coherent Lite as the bone" depth in ZR Is the Meat, Coherent Lite Is the Bone: The Next Decade of the Optical Transceiver Market.

But what really sets the pace of growth is the upstream indium phosphide (InP) laser. Management was blunt: InP capacity is currently the only major bottleneck; transceiver assembly and test capacity still has headroom, and InP is the constraint. The good news is the 6-inch InP conversion is ahead of schedule: internal InP output will double YoY within this quarter, one quarter earlier than planned, and double again by the end of 2027. One concrete quantitative signal: Coherent's InP laser output in the June quarter grew about 80% YoY, and these lasers map directly to the quarter's transceiver shipments, so management expects data center revenue growth this quarter to exceed 80% YoY. Yields on the 6-inch lines in Texas and Sweden are even higher than on 3-inch, and a third 6-inch line in Zurich is expected online in the first half of 2027.

Is InP the deepest bottleneck in the entire supply chain? It is the shared situation of the laser leaders; in Earnings Call Highlights: Lumentum (LITE) | FY2026 Q4 — The Laser Leader Turns "Optics Replacing Copper" into Financial Results we examined the same bottleneck from the perspective of another InP player.

3. CPO/NPO and PhotonLink: a full-platform position in integrated optics

The market has recently heard plenty of noise about CPO (Co-Packaged Optics), with worries about delays or NPO (Near-Packaged Optics) jumping ahead. Coherent's answer was direct: it has seen no push-out of CPO demand at all; if anything, it is being pulled in. Over the past three to six months, customer engagement on CPO and NPO has intensified noticeably, and nearly every large strategic customer has a CPO or NPO project (or both) underway. Management stressed that for Coherent, CPO and NPO are "just different form factors" with comparable content per unit, because it sells not a single laser but a full set: lasers, external laser modules, isolators, polarization-maintaining fiber, SiPho PICs, and complete fiber-attach kits.

The Sherman, Texas fab has started volume production of ultra-high-power CW lasers for CPO (including its collaboration with NVIDIA), with revenue expected to be recognized starting in the December quarter (fiscal Q2). During ECOC in September, Coherent will also launch a new integrated optics platform, PhotonLink, bundling the complete signal chain from light generation, beam shaping, transmission, and detection back to electrical signals into a one-stop solution, with a dedicated launch event on September 21. Overall, management sizes CPO/NPO/integrated optics as an incremental market of more than $15B over the coming years.

As for when CPO truly ramps and how long the shelf life of pluggable optical modules is extended, we worked through that timeline debate in CPO Ramp Pushed to 2028, but It's Not Bad News: What Gets Extended Is the Shelf Life of Pluggables; Coherent's CPO signals this quarter can be checked directly against that timeline.

4. OCS and multi-rail: the next revenue streams igniting

Beyond transceivers, Coherent described two new revenue streams more clearly this quarter. The first is Optical Circuit Switching (OCS): Q4 revenue grew sequentially, customer demand spans scale-out, scale-across, and even active scale-up engagements, which is why Coherent raised its OCS market size estimate at OFC from $2B to more than $4B (by 2030). For why OCS has moved from inside Google to the broader industry, see Google Writes the Answer into 134,000 TPUs: Virgo Network Reveals a Victory for OCS.

The second is multi-rail, addressing scale-across demand as AI workloads span multiple data centers. Coherent estimates this is a more than $2B market by 2030; samples are already with multiple customers, and initial revenue is expected to begin in the first half of 2027. We covered the context of system vendors moving into AI back-end networks and winning the industry's first multi-rail order in Earnings Call Highlights: Ciena (CIEN) | Q2 FY26 — Hyper-Rail Wins the Industry's First Multi-Rail Order; this quarter, Coherent effectively filled in the same piece of the puzzle from the component/subsystem side.

In addition, while the industrial segment was flat overall, management highlighted two long-term growth drivers: Thermadite material for data center XPU thermal management (expected to ramp starting in the second half of 2027), and more distant opportunities in fusion energy, quantum, and microLED display equipment.

5. Management outlook: guidance and language analysis

Official guidance for next quarter (FY2027 Q1): revenue of $2.2B–$2.4B, non-GAAP gross margin of 39.5%–41.5%, non-GAAP operating expenses of $400M–$420M, a tax rate of 18%–20%, and non-GAAP EPS of $1.85–$2.05. At the midpoint, both revenue and EPS step up again from this quarter.

More worth chewing on than the numbers is the level of certainty in the language. Management's confidence in FY2027 rests on three pillars: first, demand, with Q4 another quarter of record bookings; second, rising supply of key components, especially InP doubling this quarter; third, multiple new revenue streams (OCS, CPO, multi-rail, thermal materials) ramping in turn. On gross margin, Sherri Luther noted it has expanded in eight of the past nine quarters, by more than 660 bps cumulatively, and reaffirmed the mid-term target of "greater than 42%," adding that "once we reach it, we'll raise it again." That is "target"-level language, more aggressive than "expect."

The most striking line was Jim Anderson's mid-term target: Coherent just achieved its first $2B revenue quarter and expects the first quarter with revenue above $3 billion before the end of FY2027. That figure was above market consensus at the time, and it reads as confirmed visibility rather than a promise, because he also said FY2027 is essentially filled by backlog, orders extend into 2028, and LTAs include annually increasing supply volumes and take-or-pay terms.

6. Supply chain and customer clues

This quarter hid several threads worth following. First, NVIDIA: volume production of ultra-high-power CW lasers for CPO "includes the collaboration with NVIDIA," and customers keep asking to "ship more as fast as possible," which indirectly confirms Coherent's position in NVIDIA's CPO supply chain. Second, potential US import restrictions: with market rumors of import limits on optical transceivers, Coherent, as the largest transceiver supplier in the US with more than 20 US production lines, said some customers have proactively approached it about local manufacturing options; if that materializes, it is a tailwind for Coherent. Third, VCSELs: 200G VCSEL progress continues, and management expects them to be used in NPO/integrated optics applications. Fourth, external EML sales: Coherent will not sell InP lasers externally in the near term, because its own transceiver demand "consumes every bit of capacity and still isn't enough," which is itself the best footnote on demand strength.

Summary

This quarter Coherent turned "AI scales on optics" from a slogan into financial results: accelerating revenue, continued margin expansion, leverage down to 0.7x, and the confidence to write a "first $3B quarter" and "gross margin above 42%" into its 2027 roadmap. The real variable is not demand but how fast Coherent can ramp 6-inch InP capacity, which is also the shared valve for the entire optical interconnect supply chain.

For next quarter (FY2027 Q1), we suggest tracking three indicators: first, whether data center revenue growth really exceeds 80% YoY (direct evidence of whether InP capacity is delivering); second, actual recognition of CPO-related revenue in the December quarter (especially NVIDIA-related CW lasers) and the details of the 9/21 PhotonLink launch; third, whether non-GAAP gross margin keeps its slope toward 42%, especially cost structure improvements as the 6-inch InP mix rises. If all three move in the right direction together, Coherent's 2027 target will be not just management's tone but a verifiable number.