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OFC 2026: Which Optical Names Matter Most for Investors?

If there was one clear takeaway from OFC 2026, it was this: demand for optical connectivity in AI infrastructure remains extremely strong, and the real bottleneck is no longer demand creation, but supply, execution, and ecosystem formation. 

The Three Most Important OFC Takeaways

1. Demand is not the issue — supply is

The strongest message from the conference was that optical demand remains very robust. The overlap between GTC and OFC amplified the sense that compute intensity keeps rising, forcing the need for better optical solutions. The demand is outstripping supply, while closer collaboration between hyperscalers and optical vendors is giving suppliers more confidence to invest and build out capacity. 

For investors, this matters because it suggests the industry is no longer in a phase where companies need to prove demand exists. The bigger question now is who can actually deliver enough product, scale fast enough, and convert that demand into revenue and margins.

2. Architecture debates are still unresolved, but optical content is still rising

The industry is still debating the relative role of CPO, OCS, multi-rail, and newer approaches like XPO. But there is growing consensus that, regardless of which architecture gains the most share, optical content is increasing as bandwidth needs rise. 

That is an important distinction for retail investors. You do not necessarily need to predict the single final winning architecture today. In many cases, the better investment approach is to focus on companies that can benefit across multiple pathways.

3. The industry backdrop is strong, but valuations already reflect a lot

Morgan Stanley's wrap-up sounds a note of caution. The report says valuations across many optical names already assume very smooth execution, and that material upside to expectations is more likely in the second half of the year, and perhaps more meaningfully in 2027, leaving a potential near-term news gap. 

The Four Main Themes Retail Investors Should Understand

1. OCS may be one of the strongest near-term optical themes

AI training traffic often behaves like "elephant flow," making traffic patterns easier to predict and making OCS more practical. OCS also reduces the need to move back and forth between electrical and optical layers, which can save power. 

That makes OCS one of the more tangible and commercially relevant themes coming out of OFC.

2. CPO is still controversial, but it is not going away

Morgan Stanley highlights concerns around ecosystem openness, serviceability, and cost, but also says there was consensus that CPO will have some level of adoption in the coming years, with estimates ranging from 5% to 30%. The expected timeline in the report points to scale-out adoption in 2H26 and scale-up in 2H27. Lumentum, Coherent, and Corning are named as beneficiaries from the laser and fiber side, while Marvell and Broadcom are also seen as part of the broader optical engine ecosystem. 

So while CPO may not be the cleanest near-term revenue driver, it still matters as a medium-term optionality theme.

3. Multi-rail looks like a more practical, lower-TCO path

Multi-rail drew attention because it can significantly densify the network within the same power and space envelope, with total cost of ownership potentially 50% to 70% lower than today's solutions. Ciena has been the most vocal supporter, with a GA product expected in 2H26, while Nokia and Cisco also discussed opportunities. 

For investors, multi-rail may be one of the more practical and potentially earlier monetizing opportunities in the optical stack.

4. XPO highlights the market's preference for open ecosystems

Arista's new XPO standard received meaningful attention because it offers roughly four times the density, works with current transceiver technologies, and already has around 40 equipment makers tied into the multisource agreement. Morgan Stanley views XPO as an example of the kind of open-ecosystem solution hyperscalers are looking for, and calls Arista the primary beneficiary for now. 

That matters because one of the broad messages of OFC was that customers want vendor diversity and open ecosystems, even if those are not always easy to achieve in a fast-moving cycle.

Which Stocks Matter Most?

$Lumentum(LITE)$   : One of the cleanest direct ways to play the optical upcycle

Among the names discussed in the report, Lumentum stands out as one of the clearest direct beneficiaries of the current optical buildout. Morgan Stanley says Lumentum is exposed to multiple growth vectors at once, including CPO, OCS, more transceivers, and more scale-across deployment. The report also says Lumentum's TAM is growing at roughly 40% over the coming years to more than $90 billion, and highlights OCS as the biggest incremental positive, with OCS expected to become a $1 billion-plus business in 2027. 

$COHERENT(COHR)$   : High earnings leverage, but execution is everything

Coherent may offer some of the biggest earnings upside in the group if execution goes right. Morgan Stanley says the company sees a current $50 billion serviceable addressable market, plus another $20 billion-plus of incremental opportunity from OCS, CPO/NPO, multi-rail, and thermal solutions over the next several years. Importantly, the report says those incremental opportunities should all be accretive to gross margins. 

The report also highlights Coherent's thermal solutions as an interesting additional growth leg, and notes that the company plans to double InP laser capacity by 4Q26 versus 4Q25, and then more than double again by 4Q27. 

$Ciena(CIEN)$   : A steadier name with a strong market-share base

Ciena reads as one of the more established and execution-oriented names in the report. Morgan Stanley notes that the company recently delivered 76% year-over-year growth from direct data center customers, and still holds more than 70% share in long-reach DCI. The report also says multi-rail is a meaningful opportunity for the company, particularly given the potential 50% to 70% TCO savings. 

Supply remains a constraint, but Ciena says it has enough access to supply to support its FY26 growth target, with additional upside tied to more supply becoming available. 

$Marvell Technology(MRVL)$   : A broader AI infrastructure story, not just optics

Marvell stands out because its story spans both interconnect and ASIC exposure. Morgan Stanley says Marvell's connectivity portfolio spans PAM, coherent, and silicon photonics, positioning it across scale-out, scale-across, and emerging scale-up AI architectures. Demand is already strong in 800G and accelerating into 1.6T, and the report also points to Marvell's collaboration with Lumentum on OCS. 

Beyond optics, Marvell also has a growing XPU opportunity. There is a base assumption of 20% ASIC growth this year, with potential to support 100% growth in CY27 as existing customers expand and programs like Microsoft Maia scale. 

$Corning (GLW.US)$ : A lower-profile name with a very long runway

GLW is one of the companies “most in charge of their own destiny,” with a very long road of growth ahead. Corning is not the highest-beta optical trade, but it sits deeper in the infrastructure stack through fiber and related technologies. 

Corning highlighted fiber innovations around easier installation and higher density, and sounded more optimistic on CPO timing than before, now seeing some scale-out CPO revenue in 2027 and scale-up in 2028. The company also illustrated how fiber strand counts could rise from around 1,024 in scale-out to about 5,000 per rack in scale-up and roughly 20,000 within the server if fiber increasingly replaces copper. 

$Cisco (CSCO.US)$ : Strong demand, but a more cautious stance on architecture

Cisco is seeing month-over-month increases in demand, with optical representing nearly 40% of cloud orders, and the company says it holds the number one share position in ZR pluggables by shipments. Cisco also sees meaningful opportunity in scale-across and DCI, and views multi-rail as attractive for customers. 

However, Cisco remains more muted on CPO, arguing that customers want a more open ecosystem rather than further concentration of economics. The company also sees more opportunity in OCS than before, but still views it as a relatively niche product for now. 

$Nokia Oyj (NOK.US)$ : A potential share gainer if supplier diversity becomes more important

Nokia used OFC to emphasize how it is trying to gain more share in cloud AI. Nokia highlighted a broad set of DSPs and form factors tailored to customer needs, which suggests improving access to hyperscaler roadmaps and deeper customer relationships. All four DSPs are being developed on the same node, which should help create development efficiencies. 

The broader implication is that if hyperscalers increasingly want supplier diversity and more open ecosystems, Nokia could become a more relevant second-source beneficiary over time.

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