Aehr Test Systems has a proven lead in a test step AI optics needs but few can run at scale: high-power wafer-level burn-in for silicon photonics. Co-packaged optics makes it mandatory, since a chip failing after bonding scraps the whole switch, and newer devices need 2-4x more burn-in power. Bookings hit $37.2M, up over 500% in a quarter, at a book-to-bill above 3.5x. Goldman sees optical networking growing from about $15B in 2026 to $154B by 2028, and the test bottleneck forms first. x.com 

Aehr Test Systems is monetizing the test layer of the AI optical interconnect buildout as silicon photonics burn-in reaches production scale. It guided FY2027 revenue to $130-150M, up 160-200% from $50M, after record bookings of $60.7M and a $100.6M effective backlog. Every 800G and 1.6T transceiver and optical I/O chip in AI data centers needs reliability screening, so transceiver growth feeds burn-in demand. Its lead silicon photonics customer keeps reordering and a second is ramping. x.com 

Aehr remains a concentrated, expensive way to own wafer-level photonics burn-in: its 10-K says silicon-photonics customers primarily drove that revenue growth, and FY2027 guidance of $130m-$150m could nearly triple FY2026 sales, yet shares value it at about 20x the guide. Teradyne's acquired photonic-chip test business is not material to its much larger sales; Aehr's top five customers provided 70% of FY2026 revenue, so orders matter more than the headline CPO opportunity. x.com 

Aehr Test Systems is winning repeat AI business, with a $22M follow-on order from a major AI customer for its FOX-XP wafer-level burn-in systems that adds chip capacity over the next six months. Jefferies initiated coverage with a Buy and a $175 target, calling it undervalued given its AI, silicon photonics and networking exposure. After three straight weeks of selling off the highs, volume is coming in while the stock holds its 200-day EMA, setting up a curl higher. x.com 

Aehr Test Systems stands to benefit from Broadcom's custom AI chip ramp because these 600W–2kW multi-die packages need burn-in testing. Broadcom said XPU shipments rose 3.5x and laid out $115B of AI revenue in FY27 and $230B in FY28 with supply secured, backed by multi-gigawatt Google, Anthropic, OpenAI and Meta deployments. Aehr won a record $41M package-level burn-in order from its lead hyperscale customer for a custom AI ASIC, with a next-gen device moving to production later this year. x.com 

Aehr Test Systems' valuation looks ahead of its fundamentals after a strong turnaround quarter. Q4 FY2026 revenue rose 33% to $18.8 million with a return to GAAP profit, bookings hit a record $60.7 million and effective backlog topped $100.6 million. FY2027 guidance of $130-150 million implies 160-200% growth, so the post-earnings run prices in high expectations that depend on shipping FOX-XP systems on schedule without margin erosion. TRT is preferred for now. x.com  x.com 

Aehr Test Systems' lead hyperscale customer is expanding production with about $6M of follow-on Sonoma orders for a second-generation AI processor. These are production-capacity orders, not evaluations, and the customer expects the second processor eventually to exceed the volumes of the first, already in high-volume production. Teradyne's new burn-in on Titan HP overlaps only with package-level Sonoma work, not FOX-XP wafer-level burn-in that screens dies before costly CoWoS packaging. x.com 

Aehr's AI burn-in growth case is intact, but confidence in its competitive edge may need to come down as Teradyne moves into high-power burn-in. Teradyne's Titan HP, already in production, combines system-level test and burn-in and could absorb spending on dedicated tools, pressuring Sonoma orders and pricing. Aehr still won about $6M of follow-on Sonoma orders for a hyperscaler's second AI chip, with no sign FOX-XP is replaced. If the market expands enough, revenue can grow as share falls. … Show more

Aehr Test Systems remains a massive long, and its big new FOX-XP wafer-level burn-in order is for InP CW lasers that go into silicon photonics transceivers, not for silicon photonics chips, which need no burn-in. Per @lithos_graphein, the buyer is a networking leader and major supplier to the data center optical transceiver market; it is 95% likely Applied Optoelectronics. x.com  x.com 

Aehr Test Systems has become a key picks-and-shovels supplier to the AI chip boom, with its Sonoma platform the go-to system for reliability testing of high-power AI processors. On April 16, 2026, it announced a $41M follow-on order, its largest ever, from an unnamed hyperscale AI chip leader for custom AI ASIC testing, with revenue from fiscal 2027. Backlog doubled to $38.7M, second-half FY26 bookings exceed $92M, and FY26 should hit the high end of $45-50M guidance. x.com