U.S. optical communications manufacturer Applied Optoelectronics, Inc. (AAOI) is entering an expansion phase driven by high-end data center optical modules. Second-quarter revenue grew 86% year-over-year, with 800G products beginning to ramp up quickly. Meanwhile, the qualification, shipment, and production ramp of 1.6T products will be key variables determining the trajectory of the company's next phase of revenue and profit margins.
For the second fiscal quarter ended June 30, 2026, AAOI's revenue was $191.9 million, representing an 86.4% increase year-over-year and a 27% increase sequentially. Data center business revenue exceeded $100 million for the first time, growing 140% year-over-year and accounting for 56% of total revenue, becoming the largest revenue source. The company reported non-GAAP net income of $5.48 million, or non-GAAP earnings per share of $0.06, returning to quarterly profitability.
During the earnings conference call, management stated that demand related to AI infrastructure remains strong, with customer demand exceeding AAOI's current supply capability by approximately 20% to 40%. This means the primary constraint on near-term revenue growth is not orders, but manufacturing capacity and the supply of key components such as DSPs and TIAs. The company anticipates that 800G revenue will approach a fivefold sequential increase in the third quarter, while 1.6T products are expected to begin shipping in the later part of the third quarter and ramp gradually in the fourth quarter.
This growth is accompanied by significantly higher capital investment. AAOI's capital expenditure for the second quarter reached $565.5 million, including approximately $280 million in equipment prepayments, primarily for expanding production capacity for 400G, 800G, and 1.6T products. Moving forward, the focus will shift from the strength of demand to the pace of capacity release, supply chain security, return on capital expenditure, and whether high-end products can drive gross margin expansion.
Data Center Revenue Surpasses $100 Million; Growth Focus Shifts from 400G to 800G
AAOI's second-quarter data center business revenue was $107.7 million, a 140.4% increase year-over-year and a 32.3% increase sequentially. This business has now surpassed CATV to become the company's most significant revenue source.
Looking at the product mix, 100G products accounted for 38.3% of data center revenue, 200G and 400G products combined for 45%, 800G products for 11.9%, and 10G and 40G products for 4.4%. Among these, 400G revenue was $48.4 million, growing over fourfold year-over-year and 27.4% sequentially, remaining a crucial revenue pillar for the current data center business.
However, for investors, changes in the 800G segment are more indicative. Second-quarter 800G revenue was $12.8 million, increasing more than tenfold year-over-year and over 100% sequentially. Management expects 800G revenue to approach a fivefold sequential increase in the third quarter, indicating that the growth focus of the company's data center products is gradually shifting from 100G and 400G to higher-speed products.
Simultaneously, the 100G business might face pressure of approximately $20 million to $25 million in revenue in the third quarter due to supply constraints of switches from one customer. Management attributed this issue to the customer's limited access to 100G switches, stemming from a shortage of memory supply. This also reflects that AAOI's revenue cadence depends not only on its own shipping capabilities but also on the supply status of customers' system equipment.
Demand Exceeds Supply; Capacity and Key Components Become Main Constraints
Management repeatedly emphasized during the call that demand for next-generation AI infrastructure is robust, with current customer demand exceeding AAOI's supply capability by about 20% to 40%. In this context, the company's near-term growth ceiling is primarily determined by capacity and the supply of key materials.
For 800G and 1.6T products, components like DSPs and TIAs remain relatively tight. Although AAOI possesses in-house laser manufacturing capability, which alleviates some industry supply pressure, the overall delivery of high-end modules still depends on the coordinated supply of key electronic and optical components.
By the end of the second quarter, the combined monthly production capacity for the company's 800G and 1.6T products was close to 200,000 units, up from nearly 100,000 units at the end of the first quarter. The company plans to increase the relevant monthly capacity to over 650,000 units by the end of 2026 and further raise it to over 930,000 units by the end of 2027, with more than half of this capacity expected to come from Texas.
AAOI's manufacturing footprint in the greater Houston area has expanded to over 1.6 million square feet. A 210,000-square-foot factory near the company's headquarters is expected to begin initial production by the end of the third quarter, entirely dedicated to 800G and 1.6T transceivers. The company is also progressing with the construction of other facilities in Pearland and Houston, with related capacity expected to come online in early 2027.
Management noted that 800G and 1.6T products can use the same production lines and manufacturing processes, with differences mainly in the final testing stage. This arrangement helps the company allocate capacity between different speed products and reduces switching costs associated with demand fluctuations for any single product.
1.6T Enters Qualification and Initial Shipping Phase, Determining Future Revenue Trajectory
If 800G is to become the main growth driver for AAOI in the second half of the year, then 1.6T will determine the company's growth trajectory around 2027.
The company expects the first 1.6T product to complete customer qualification within the next few weeks and begin shipping in the latter part of the third quarter. The previously secured large-volume 1.6T order is anticipated to start from the end of the third quarter, enter the ramp phase in the fourth quarter, with some demand potentially extending into the first quarter of 2027.
The long-term path provided by management suggests that by mid-2027, monthly revenue from 100G and 400G products could be around $90 million, 800G monthly revenue around $217 million, and 1.6T monthly revenue around $164 million. If this cadence is realized, the combined monthly revenue from data center transceivers would reach approximately $471 million.
However, achieving this path depends on multiple conditions, including equipment installation, customer qualification, material supply, and manufacturing yield. Particularly for 1.6T products, while they hold higher revenue and gross margin potential, supply constraints of key components may still limit the near-term ramp speed.
Therefore, the significance of 1.6T for AAOI lies not only in adding a new product category but also in its potential to further shift the revenue structure towards higher-end products and improve the company's profitability quality.
CATV Continues to Provide Revenue Support, Expected to Exceed $100 Million in Q3
While the data center business accelerates its growth, the CATV business remains an important component of AAOI's current revenue structure.
Second-quarter CATV revenue was $80.58 million, a 43.8% increase year-over-year and a 20.6% increase sequentially, exceeding the company's previous guidance of $75 million to $80 million. This business accounted for approximately 42% of total revenue, providing stable support while the company's high-end data center module capacity is still in the ramp phase.
Management expects third-quarter CATV revenue to rise to $100 million to $110 million, with full-year revenue projected to exceed $325 million. Mediacom has selected AAOI as the primary supplier for its DOCSIS 4.0 network upgrade, with related products including 1.8GHz intelligent amplifiers and software solutions.
In terms of revenue composition, data center and CATV form the dual engines of AAOI's current business. The former offers higher growth elasticity, while the latter maintains a higher revenue base in the short term. As the proportion of 800G and 1.6T increases, the driving effect of the data center business on the company's overall growth is expected to further strengthen.
Gross Margin Faces Short-Term Pressure; High-End Product Mix Determines Improvement Space
AAOI's second-quarter GAAP gross margin was 27.7%, down from 29.1% in the first quarter. Non-GAAP gross margin was 29.8%, at the upper end of the company's previous guidance range of 29% to 30%. The company's guidance for third-quarter non-GAAP gross margin is 29% to 30.5%.
The fact that gross margin did not improve alongside the high revenue growth reflects cost pressures during the capacity expansion and product introduction phases. Operating expenses were $67.6 million, representing 35.2% of revenue. Management mentioned that increased shipping costs due to the rapid ramp of the CATV business, along with heightened customer qualification requirements for 800G and 1.6T products, pushed up R&D and operating investments.
The second-quarter GAAP net loss was $22.78 million, or a loss per share of $0.28. After adjustments, the company achieved non-GAAP net income of $5.48 million, or non-GAAP diluted earnings per share of $0.06. The return to adjusted profitability is an important signal, but the quarter's non-GAAP profit was also impacted by a $12.97 million tax benefit. Investors should still monitor whether future profit improvements can stem more from operational performance.
Management's long-term goal is to increase non-GAAP gross margin to approximately 40%. The path to achieving this mainly includes an increased proportion of 1.6T products, the ramp of higher-value-added lasers and CPO-related modules, and manufacturing efficiency improvements. In the short term, material tightness for components like DSPs and TIAs, along with potential expediting fees, may partially offset gross margin improvements brought by the product mix upgrade.
Capital Expenditure Increases Significantly; Expansion Progress Will Determine Capital Efficiency
To capture the window of demand for high-end optical modules, AAOI is significantly increasing its capital investment.
As of the end of the second quarter, the company's cash, cash equivalents, short-term investments, and restricted cash totaled $508.8 million, up from $449.4 million at the end of the first quarter. The company has raised a net $538.8 million through a new ATM offering, providing funding support for the expansion.
Second-quarter capital expenditure reached $565.5 million, with approximately $280 million allocated for equipment prepayments, focused on building manufacturing capacity for 400G, 800G, and 1.6T transceivers. The company stated that capital expenditure intensity in the second half of the year is expected to be higher than in the first half, with funding coming from existing cash, operating cash flow, some equity financing, and new debt.
The balance sheet also reflects the accelerated expansion pace. Net property, plant, and equipment increased to $697.1 million, significantly up from $419.0 million at the end of the first quarter. Inventory rose from $206.2 million to $278.8 million, primarily to support near-term capacity ramp and raw material reserves.
This means AAOI's core validation metrics in the coming quarters will become more specific: whether equipment can be received on schedule and converted into effective capacity, whether key components can be sufficiently secured, whether customer qualifications can proceed smoothly, and whether the new capacity can generate sufficient revenue and profit improvement to cover the capital investment.
Annual Revenue Target Points to Approximately $1.1 Billion; Fulfillment Cadence Still Depends on Supply Chain
The company maintains its target of approximately $1.1 billion in revenue for this year. Based on second-quarter revenue of $191.9 million and expectations for high-end product ramp in the second half, achieving this target relies on the CATV business continuing its strong performance, the rapid ramp of 800G, and initial revenue contribution from 1.6T.
AAOI's current operational logic is relatively clear: demand remains strong, with customer demand exceeding the company's supply capability; 800G will take over from 400G as the near-term growth mainstay; 1.6T will determine the upside potential for revenue and gross margins in the next phase; while capital expenditure, expansion of U.S. domestic manufacturing, and supply of key components constitute the necessary conditions for realizing this growth path.
For the market, the focus of risk for AAOI is no longer whether demand exists, but whether growth can be delivered as planned. Any delays in capacity construction, material security, customer qualification, or the shipment cadence of high-end products could impact the timeline for revenue ramp and profitability improvement.
