WhiteLine Daily said the latest earnings reports added to the case that optical interconnect demand remains strong. In its view, 800G has already entered volume shipment, while 1.6T is starting to ramp. The market’s focus is now shifting away from demand itself and toward whether capacity can be released on schedule, and whether gross margins can hold during expansion.
AAOI says 800G is already shipping at scale, with capacity as the near-term constraint
Applied Optoelectronics, or AAOI, reported $108 million in second-quarter data center revenue, up 140% from a year earlier. Its 800G shipment volume more than doubled from the prior quarter. On the earnings call, management gave a blunt assessment: if the company could make more, it could sell more now, and demand may stay above capacity through at least mid-2027.
That leaves AAOI’s current setup relatively straightforward. The company has already started expanding its U.S. manufacturing base and plans to keep increasing 800G and 1.6T capacity, with a year-end target of more than 650,000 units of monthly capacity.
The more immediate issues are line ramp, yield, and delivery speed. Expansion also brings added equipment, labor, and manufacturing costs. As a result, shipment growth alone will not settle the question; whether gross margin improves alongside higher output will shape the quality of profit conversion. AAOI has already identified 800G and 1.6T expansion as its core growth driver for this year.
MACOM flags InP DFB shortages as the bottleneck moves upstream
MACOM’s earnings report offered a second signal from the supply chain. The company posted quarterly revenue of $342.2 million, up 36% year over year. Its midpoint revenue guide for the next quarter came to about $420 million, clearly above prior market expectations.
Management also said the industry is seeing shortages in InP DFB lasers. That matters because it suggests strong demand for pluggable optical modules is now moving upstream into the optical source segment, shifting the bottleneck toward lasers.
WhiteLine Daily drew a distinction between current results and the longer-dated CPO and NPO opportunity. MACOM’s high-power CW lasers have entered product and qualification stages, but large-scale revenue contribution still sits further out. In this earnings cycle, the business that is actually showing up in results is demand tied to existing 800G, 1.6T, and optical components. CPO and NPO remain more of an incremental opportunity for the next two to three years.
MACOM currently offers 75mW and 100mW high-power CW DFB laser products. Even so, the path from product availability to material revenue still runs through qualification and volume production ramp.
As the sector moves into an expansion phase, output and gross margin become the key checks
Looking across AAOI, Tower, MACOM, and GlobalFoundries, WhiteLine Daily said the supply-chain picture is becoming clearer. Module supply remains tight. Customers have already locked in SiPho wafer capacity. InP DFB is starting to run short, while foundries continue to invest in silicon photonics and advanced packaging.
Tower has signed $1.3 billion in SiPho contracts through 2027 and has received $290 million in customer prepayments. GlobalFoundries is also advancing its CPO platform and next-generation silicon photonics technology.
In WhiteLine Daily’s reading, this earnings season did more than confirm that AI optical module demand is healthy. The next stage is about execution: which companies can convert added capacity into real shipments fastest, and which can keep yield, pricing, and gross margin intact while expanding.