ADTRAN could re-rate like Harmonic once the market understands its optical networking story, as it sits at the start of three tailwinds at once. US BEAD broadband funding should contribute substantially from late 2026; Europe's proposed Huawei removal favors ADTRAN as a primary Western alternative; and AI data center optics, a $154 billion TAM by 2028 per Goldman Sachs, fits its new LiteWave800. Q1 revenue rose 15.5% to $286.1 million, US revenue 42%, and operating margin reached 6.9%. x.com  … Show more

Adtran rides three spending cycles still in their first innings. The US is spending $42.5B to bring fiber to every unserved household through 2028-plus, buying the OLTs, ONTs and optical transport Adtran makes; European telcos are replacing Huawei and ZTE gear, where Adtran has the only optical platforms approved for EU/NATO classified data; and an EU 2030 post-quantum mandate suits its ConnectGuard encryption. Revenue rose 15.5% to $286M, it is GAAP profitable, and it trades at 1.17x sales. … Show more

Adtran's new optical product now looks badly timed. After the earnings call it looks like a prototype, not even at sampling, while the market has moved past 100G per lane and 800G may be skipped faster than expected in favor of 1.6T and CPO. The CEO said in May that volume production should be ready in about a year, just as competitors bring much more capacity online. Customers like it and Adtran should find a place, but a smaller, slower revenue ramp makes the re-rating less compelling. 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 

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 

ADTRAN is best avoided because it has failed to execute well during an upcycle, however cheap it looks relative to peers and despite its optical assets. 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 

Applied Optoelectronics is the US-built option in 800G datacenter transceivers, where there is almost no domestic supply. It is scaling its line in Sugar Land, Texas, while larger Innolight and Eoptolink build in Asia and Lumentum and Coherent are crowded large caps. It also makes its own lasers, which Goldman flags as the binding shortage through 2027. Revenue rose 86% last quarter, with net cash. Risks: a -12% operating margin, concentrated customers, and whether in-house lasers hold at 1.6T. … Show more

Applied Optoelectronics should trade above $150, in part because Lumentum's CEO says its optical components are sold out through early 2029 and it cannot meet roughly 70% of demand for some products through 2027. That industry signal strengthens the case for AAOI's expanding 800G/1.6T offerings after completion of its $600M ATM, with shares around $110. 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