Finn Stockinger
Equity Analyst & Investor, Technology Research
Optical transceiver demand exceeds supply, and 1.6T lifts revenue per module for suppliers able to qualify capacity. Applied Optoelectronics raised at least $1.62B through 2026 ATMs; its last reported monthly capacity was 200,000 modules versus a year-end target above 650,000. Credo expects over $600M in FY2027 revenue across optical DSPs, PICs and modules, not modules alone. Shipments, yields and margins must prove out. Lumentum and Coherent already price in much expected growth. x.com
Lumentum, Coherent and Applied Optoelectronics benefit from pluggable optical transceivers, the part of AI optics that makes money now. Pluggables are driving AI data centers' upgrade from 400G to 800G, with 1.6T starting to roll out. Worries about near-packaged or co-packaged optics are overdone for vertically integrated suppliers, which can also provide the lasers and photonic components those architectures need, so their opportunity extends beyond pluggable modules. x.com x.com
Rising 1.6T switching demand favors optical suppliers, though their execution risks vary. Bank of America says the market could grow ~101% annually through 2030. Marvell's leading DSPs and Lumentum's supply-short 200G EML lasers are lowest risk; Applied Optoelectronics' capacity expansion and Fabrinet's customer concentration make them medium risk. Aeluma remains pre-commercial, while Lightwave Logic's polymer modulators are a high-risk moonshot despite its TSM partnership. x.com
Optics and photonics should be among AI's biggest winners as faster GPU networks need optical connections that suppliers cannot expand quickly enough. Lumentum says some components are sold out through early 2029; Sivers is investing $30M to target more than 100M lasers a year, with operations expected in Q4 2027. Potential US restrictions on Chinese transceivers could reshape supply in 2027. Applied Optoelectronics and Sivers are the favorites. x.com x.com
Co-packaged optics standards could make finished transceiver modules smaller and more interchangeable as chip designers build optical engines inside their packages. That is another reason to avoid Lumentum, Coherent and Applied Optoelectronics and prefer Soitec. Lumentum and Coherent now earn a lot from finished modules, leaving them exposed if the architecture changes. x.com
Optical suppliers face demand beyond capacity, strengthening the sector's case for the coming months. Lumentum's CEO says it is effectively sold out through early 2029; Ciena says lead times limit growth, and Coherent cites constraints across nearly every product line. Applied Optoelectronics doubled its share count to expand capacity and meet demand. Soitec raised guidance twice this year; Marvell raised guidance and its 2030 TAM, while Broadcom sees 4x EPS by 2030 on visible demand. x.com
Marvell risks paying a peak-scarcity price for Lumentum if optical supply catches up by 2028-30. The proposed ~$99B deal values Lumentum at roughly 20x guided annualized revenue and 58x estimated after-tax operating income, while Lumentum, Coherent and Chinese suppliers are adding laser capacity. The DSP-and-laser combination has strategic logic, but durable scarcity economics and Nvidia's response remain uncertain. x.com
Applied Optoelectronics, Lumentum and Coherent face share losses at US hyperscalers to Innolight. Channel checks favor Innolight gaining share in Q2 2026, at the expense of those three. Per @poezhao0605, a $7B Hong Kong IPO, the largest in years and upsized from $5B on strong demand, has cleared its listing hearing. x.com
A projected 322-fold expansion in scale-up optical engines favors Lumentum, Coherent and Applied Optoelectronics. Bloomberg Intelligence forecasts the market growing from $279 million in 2026 to $90 billion in 2030. Optical engines are the most valuable part of the photonics bill of materials. x.com
Applied Optoelectronics looks undervalued if its capacity converts into the modeled revenue ramp. From disclosed capacity, quarterly revenue could rise from $858M in Q1 2027 to $1.89B in Q4 and $2.14B in Q1 2028, against a $6.8B market cap. A $7.5B annualized exit rate in 2027 at 40% gross margins would make an unchanged valuation surprising. Lumentum's capacity agreements into 2030-31 suggest demand may last beyond 2027-28, but execution risk remains. x.com
Photonics stocks such as Coherent, Lumentum, Corning, Applied Optoelectronics and Ciena are priced on unknown future demand rather than current results. Lumentum's revenue has been flat, yet projections for the year ending June 2029 call for $12.8 billion, over 4x this year's $2.96 billion. That is great if true, but a lot can happen before then, especially any disruption to the data-center buildout boom. x.com
Even half of a rumored jump in Applied Optoelectronics' transceiver shipments would be well above what is priced in. A Substack claims 800G shipments will rise from about 600,000-700,000 to about 5 million next year, plus about 100,000 1.6T units a month; the rumor is low-confidence. x.com
