Veeco is a top beneficiary of AI data centers' shift to photonics, as its tools make the indium phosphide lasers inside 800G and 1.6T transceivers and equipment orders lead the chip cycle. It disclosed over $250M of orders for its IBD, MOCVD and WaferEtch systems, shipping from late 2026 and ramping through 2027. Its laser annealing is critical to yields for 3nm and 2nm logic and HBM at makers like TSMC and Micron, and its pending Axcelis merger should add synergies. 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 

AI bandwidth demand still favors Coherent and Lumentum, but tight customer financing can delay orders and lasting valuations need durable profits. A model provider losing share need not reduce total bandwidth use. Coherent could beat and raise guidance; Lumentum may only meet estimates this quarter, improving next quarter. If margins partly reflect scarce indium phosphide, added supply will test whether upgrades, volume and cost gains sustain earnings. These earnings calls remain forecasts. … Show more

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 

Lumentum's Raman pump lasers could benefit as more inter-site AI network spending shifts to optical line systems. Cignal AI forecasts those systems taking 57% of this spending by 2030, up from 29% in 2026, and identifies Raman amplification as a major cost driver and pump lasers as one of the tightest supply-chain components. Lumentum offers those lasers and the amplifiers built around them. x.com 

Aixtron's position is durable but not unconstrained, with optical lasers carrying the near-term case: it holds over 90% of InP MOCVD and every high-speed laser traces back to its reactors. Its share will likely erode toward 65-75% by decade-end as Veeco improves and Chinese buyers diversify, manageable if the InP tool market doubles or triples. The bigger near-term limit is capacity, as Aixtron reallocates existing lines rather than adding aggressively. 800V DC power demand looks further off. … Show more

InP substrate demand and pricing still support the AI optics supply chain. Yunnan Germanium reports higher InP volumes from AI data centers and optical communications, plus higher prices. Q3 revenue rose 134.6% year on year, near AXT's guided 136%, but also includes germanium. IQE's H1 photonics grew 45%, partly from US defense funding. AXT's $66m Q3 guide covers only licensed exports or sales needing no license; a miss would more likely reflect licensing. x.com 

Aixtron and Veeco stand to benefit because indium phosphide is the real bottleneck in optical interconnect, one nothing else can replace. InP looks set to stay structurally short in both demand and supply over the next three to five years, a theme the market has not yet fully priced, which makes both equipment makers attractive. x.com  x.com 

Networking is the next AI hardware trade after memory, whose share of rack value rose from 15% to 35%. Optics is moving inside the server, as Nvidia's Feynman architecture builds in co-packaged optics and silicon photonics. Scale-across networking could grow 30% a year just linking existing data centers, as inference moves closer to users and training spreads across sites. Supply is tight: Lumentum's CEO said it can meet only 30% of expected 2027 demand and sees optics tighter than memory. x.com 

Photonics leaders' demand now outruns supply into 2027-2028. Lumentum and Coherent each have $2B Nvidia deals, with Lumentum lasers sold out through 2028 and Coherent orders reaching 2028. AAOI demand exceeds capacity through mid-2027; Ciena has a record $7.7B backlog. Credo targets $600M of FY2027 optical revenue, POET has a $500M five-year framework, AXT's InP backlog tops $100M as capacity doubles, and Sivers' pipeline is up 77% YTD to about $799M. x.com