Lumentum (LITE)
Builds laser components and optical systems for AI data centers, telecom networks, and industrial uses.
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Lumentum makes the tiny lasers and assembled boxes that turn electrical traffic into light for data centers, telecom networks, and factories. Its older network and industrial lines still matter, but the company is rapidly becoming an AI data-center supplier. That transition is fast, factory-constrained, and unusually dependent on a few giant customers.
Item facts: FY2026 · year ended Jun 27, 2026, from filings, earnings calls and company pages.
Judgment weights, not filed revenue
The band summarizes business focus and direction. ~ marks estimates.
7 in detail · 9 more below
EMLs and CW Lasers for Silicon Photonics Transceivers
These tiny lasers are the main capacity-limited growth engine. The newest version, carrying two hundred billion bits each second on one path, passed 25% of this laser family's sales; factory output and customer adoption set the pace.
Competes with High Speed EML 200 Gb/s (Sumitomo Electric Device Innovations) · 200G InP EML (Coherent)
In plain English
A laser smaller than a grain of rice starts each high-speed data link. One version switches light on and off to carry information; the other shines steadily into a separate silicon chip that does the switching. Together they serve links running from four hundred billion to more than a trillion bits each second.
Makers of plug-in data-link modules buy these parts for every connection they assemble. Lumentum earns money when each laser ships, so sales depend on how many good parts its factories can make and how quickly customers adopt the faster version.
NVIDIA Strategic Partnership
NVIDIA promised to buy advanced lasers over several years, with the total worth multiple billions of dollars. The promise supports expansion, but sales still wait on product approval, factory output, and NVIDIA's chosen designs.
Competes with NVIDIA–Coherent partnership (Coherent) · Bailly CPO platform (Broadcom)
In plain English
Think of NVIDIA reserving a large slice of a busy workshop before the extra machines are installed. Its non-exclusive agreement gives it future access to Lumentum's advanced laser-making capacity and promises purchases over several years.
Lumentum gets paid only as approved lasers ship, so the promise is not cash-register sales today. NVIDIA also funded the expansion by buying preferred shares that can later turn into ordinary stock. Because NVIDIA struck a parallel supply deal with Coherent, Lumentum must still pass customer tests, raise the share of usable factory output, and win its share of orders.
UHP Laser Sources for CPO and NPO
Extra-powerful light sources for future data-center connections remain a small business today. A lead customer placed the first module order, but large-volume shipments were planned for the second half of 2027, making adoption the key watchpoint.
Competes with High-power sources (Coherent) · Pluggable laser/CPO platform (Broadcom)
In plain English
Future computer racks may move the light source away from each removable cable plug and place it beside, or inside, the switching equipment. Lumentum's ultra-high-power lasers provide that shared outside light, sending it through glass fibers to several connections.
Customers pay for laser chips now and complete light-source modules later. The first module order is in, yet the lead customer's large production run was planned for the second half of 2027. Until those designs leave testing and reach volume, this is a small offshoot of today's laser-parts business rather than a separate money engine.
Datacom Transceivers
Removable modules turn electrical signals into light between AI computers. Eight-hundred-billion-bit links reached record sales and the faster 1.6-trillion-bit generation entered production; watch how smoothly customers qualify and deploy the new modules.
Competes with 800G/1.6T modules (InnoLight) · 1.6T pluggable portfolio (Coherent)
In plain English
At either end of a glass data cable sits a small removable module. It translates electrical signals from a computer into flashes of light, then reverses the process at the other end. Lumentum now sells versions carrying eight hundred billion or one point six trillion bits each second.
Cloud operators need more of these modules whenever they add computers and network switches. They pay per unit through the equipment supply chain, and Lumentum can use its own lasers inside. The catch is timing: new modules must pass customer tests, stay cool enough, and receive the required signal-processing chips before orders become shipments.
Optical Circuit Switches
Mirror-filled boxes reroute glass-fiber connections without first turning light back into electricity. Orders waiting to ship exceeded $400 million across three cloud customers; the test is whether shifting network designs turn that backlog into sustained shipments.
Competes with S320 (Calient) · 300x300 OCS (Coherent)
In plain English
Picture a railway junction for beams of light. Hundreds of tiny movable mirrors steer each incoming glass fiber toward a different outgoing fiber, letting a data center rearrange which computers talk to one another without translating the signal back into electricity.
Cloud operators buy the switch boxes as they build new computer clusters, then control the paths with software. Lumentum earns when a box ships, not when an order is merely placed. Shipments doubled in the final quarter of the year, but just three unnamed customers made up the waiting orders and those orders can still move or disappear.
DCI, Metro, Long Haul, and Submarine Products
Lasers, light filters, amplifiers, modules, and assembled boards carry traffic between data centers and across city, national, and undersea networks. This mature line remains substantial; spending by carriers and data-center operators decides its pace.
Competes with 800G ZR/ZR+ optics (Cisco/Acacia) · ITLAs and pump-laser subassemblies (Coherent)
In plain English
Not every data link stays inside one building. Lumentum supplies the pieces that launch, strengthen, sort, and receive light as information travels across a city, between data centers, or under an ocean. It also sells some of those pieces already assembled into modules and circuit boards.
Network-equipment makers, phone-network operators, and cloud companies pay when they add routes or upgrade each fiber to carry more information. This family mixes small components with larger assemblies, so no single unit price explains it. Demand follows long construction schedules, available fiber, and whether the customer's signal-processing equipment works with Lumentum's optics.
Industrial Laser
Precision and high-power lasers mark, cut, and weld materials for factories and medical-device production. At roughly one-twentieth of sales, this is a modest, slower-moving line whose demand follows manufacturers' equipment spending and factory use.
Competes with YLS fiber lasers (IPG Photonics) · Industrial fiber lasers (Coherent)
In plain English
The unglamorous workshop line does jobs that drills and blades cannot do as neatly. Lumentum's short-pulse lasers make tiny marks and cuts; its stronger fiber lasers cut and weld larger pieces. Manufacturers place these sources inside machines used for electronics, medical devices, and metalworking.
Industrial equipment makers and machine builders buy a laser for each system they assemble, so Lumentum is paid when factory customers invest in new tools. Orders rise and fall with manufacturing budgets and how busy plants are. This line still contributes cash, but it receives far less attention than the data-center expansion.
EMLs and CW Lasers for Silicon Photonics TransceiversThese tiny lasers are the main capacity-limited growth engine. The newest version, carrying two hundred billion bits each second on one path, passed 25% of this laser family's sales; factory output and customer adoption set the pace.These tiny lasers are the main capacity-limited growth engine. The newest version, carrying two hundred billion bits each second on one path, passed 25% of this laser family's sales; factory output and customer adoption set the pace.
In plain English
A laser smaller than a grain of rice starts each high-speed data link. One version switches light on and off to carry information; the other shines steadily into a separate silicon chip that does the switching. Together they serve links running from four hundred billion to more than a trillion bits each second.
Makers of plug-in data-link modules buy these parts for every connection they assemble. Lumentum earns money when each laser ships, so sales depend on how many good parts its factories can make and how quickly customers adopt the faster version.
Competes with High Speed EML 200 Gb/s (Sumitomo Electric Device Innovations) · 200G InP EML (Coherent)
NVIDIA Strategic PartnershipNVIDIA promised to buy advanced lasers over several years, with the total worth multiple billions of dollars. The promise supports expansion, but sales still wait on product approval, factory output, and NVIDIA's chosen designs.NVIDIA promised to buy advanced lasers over several years, with the total worth multiple billions of dollars. The promise supports expansion, but sales still wait on product approval, factory output, and NVIDIA's chosen designs.
In plain English
Think of NVIDIA reserving a large slice of a busy workshop before the extra machines are installed. Its non-exclusive agreement gives it future access to Lumentum's advanced laser-making capacity and promises purchases over several years.
Lumentum gets paid only as approved lasers ship, so the promise is not cash-register sales today. NVIDIA also funded the expansion by buying preferred shares that can later turn into ordinary stock. Because NVIDIA struck a parallel supply deal with Coherent, Lumentum must still pass customer tests, raise the share of usable factory output, and win its share of orders.
Competes with NVIDIA–Coherent partnership (Coherent) · Bailly CPO platform (Broadcom)
UHP Laser Sources for CPO and NPOExtra-powerful light sources for future data-center connections remain a small business today. A lead customer placed the first module order, but large-volume shipments were planned for the second half of 2027, making adoption the key watchpoint.Extra-powerful light sources for future data-center connections remain a small business today. A lead customer placed the first module order, but large-volume shipments were planned for the second half of 2027, making adoption the key watchpoint.
In plain English
Future computer racks may move the light source away from each removable cable plug and place it beside, or inside, the switching equipment. Lumentum's ultra-high-power lasers provide that shared outside light, sending it through glass fibers to several connections.
Customers pay for laser chips now and complete light-source modules later. The first module order is in, yet the lead customer's large production run was planned for the second half of 2027. Until those designs leave testing and reach volume, this is a small offshoot of today's laser-parts business rather than a separate money engine.
Competes with High-power sources (Coherent) · Pluggable laser/CPO platform (Broadcom)
Datacom TransceiversRemovable modules turn electrical signals into light between AI computers. Eight-hundred-billion-bit links reached record sales and the faster 1.6-trillion-bit generation entered production; watch how smoothly customers qualify and deploy the new modules.Removable modules turn electrical signals into light between AI computers. Eight-hundred-billion-bit links reached record sales and the faster 1.6-trillion-bit generation entered production; watch how smoothly customers qualify and deploy the new modules.
In plain English
At either end of a glass data cable sits a small removable module. It translates electrical signals from a computer into flashes of light, then reverses the process at the other end. Lumentum now sells versions carrying eight hundred billion or one point six trillion bits each second.
Cloud operators need more of these modules whenever they add computers and network switches. They pay per unit through the equipment supply chain, and Lumentum can use its own lasers inside. The catch is timing: new modules must pass customer tests, stay cool enough, and receive the required signal-processing chips before orders become shipments.
Competes with 800G/1.6T modules (InnoLight) · 1.6T pluggable portfolio (Coherent)
Optical Circuit SwitchesMirror-filled boxes reroute glass-fiber connections without first turning light back into electricity. Orders waiting to ship exceeded $400 million across three cloud customers; the test is whether shifting network designs turn that backlog into sustained shipments.Mirror-filled boxes reroute glass-fiber connections without first turning light back into electricity. Orders waiting to ship exceeded $400 million across three cloud customers; the test is whether shifting network designs turn that backlog into sustained shipments.
In plain English
Picture a railway junction for beams of light. Hundreds of tiny movable mirrors steer each incoming glass fiber toward a different outgoing fiber, letting a data center rearrange which computers talk to one another without translating the signal back into electricity.
Cloud operators buy the switch boxes as they build new computer clusters, then control the paths with software. Lumentum earns when a box ships, not when an order is merely placed. Shipments doubled in the final quarter of the year, but just three unnamed customers made up the waiting orders and those orders can still move or disappear.
Competes with S320 (Calient) · 300x300 OCS (Coherent)
DCI, Metro, Long Haul, and Submarine ProductsLasers, light filters, amplifiers, modules, and assembled boards carry traffic between data centers and across city, national, and undersea networks. This mature line remains substantial; spending by carriers and data-center operators decides its pace.Lasers, light filters, amplifiers, modules, and assembled boards carry traffic between data centers and across city, national, and undersea networks. This mature line remains substantial; spending by carriers and data-center operators decides its pace.
In plain English
Not every data link stays inside one building. Lumentum supplies the pieces that launch, strengthen, sort, and receive light as information travels across a city, between data centers, or under an ocean. It also sells some of those pieces already assembled into modules and circuit boards.
Network-equipment makers, phone-network operators, and cloud companies pay when they add routes or upgrade each fiber to carry more information. This family mixes small components with larger assemblies, so no single unit price explains it. Demand follows long construction schedules, available fiber, and whether the customer's signal-processing equipment works with Lumentum's optics.
Competes with 800G ZR/ZR+ optics (Cisco/Acacia) · ITLAs and pump-laser subassemblies (Coherent)
Industrial LaserPrecision and high-power lasers mark, cut, and weld materials for factories and medical-device production. At roughly one-twentieth of sales, this is a modest, slower-moving line whose demand follows manufacturers' equipment spending and factory use.Precision and high-power lasers mark, cut, and weld materials for factories and medical-device production. At roughly one-twentieth of sales, this is a modest, slower-moving line whose demand follows manufacturers' equipment spending and factory use.
In plain English
The unglamorous workshop line does jobs that drills and blades cannot do as neatly. Lumentum's short-pulse lasers make tiny marks and cuts; its stronger fiber lasers cut and weld larger pieces. Manufacturers place these sources inside machines used for electronics, medical devices, and metalworking.
Industrial equipment makers and machine builders buy a laser for each system they assemble, so Lumentum is paid when factory customers invest in new tools. Orders rise and fall with manufacturing budgets and how busy plants are. This line still contributes cash, but it receives far less attention than the data-center expansion.
Competes with YLS fiber lasers (IPG Photonics) · Industrial fiber lasers (Coherent)
Named in filings, launches and programs
- Customer A and Customer BCustomer programTwo unnamed end customers supplied 41.6% of annual revenue together, making their order plans unusually important.
- 3D Sensing VCSELsProduct lineSmall laser arrays help consumer and automotive devices judge depth; management described their recent sales contribution as small.
- DMLsProductSimpler lasers switch themselves on and off for shorter-distance, lower-speed optical connections.
- Active Optical CablesProduct lineReady-made cable assemblies combine glass fiber with the signal-converting modules at each end.
- Photodiodes and Photonic Integrated CircuitsProduct lineReceiver parts detect incoming light, while integrated optical chips combine several light-handling jobs in one component.
- Cable Access ProductsProduct lineOptical parts help broadband cable networks carry data over their access lines.
- Passive Components and ModulesProduct lineUnpowered optical parts sort, monitor, switch, and soften different colors of light inside telecom networks.
- Q-switched DPSS LasersProduct linePulsed solid-state lasers make precise marks and cuts in industrial materials.
- Kilowatt Fiber LasersProduct lineHigh-power laser sources cut and weld metal inside industrial machines.
Customer A and Customer BCustomer program
Two unnamed end customers supplied 41.6% of annual revenue together, making their order plans unusually important.
3D Sensing VCSELsProduct line
Small laser arrays help consumer and automotive devices judge depth; management described their recent sales contribution as small.
DMLsProduct
Simpler lasers switch themselves on and off for shorter-distance, lower-speed optical connections.
Active Optical CablesProduct line
Ready-made cable assemblies combine glass fiber with the signal-converting modules at each end.
Photodiodes and Photonic Integrated CircuitsProduct line
Receiver parts detect incoming light, while integrated optical chips combine several light-handling jobs in one component.
Cable Access ProductsProduct line
Optical parts help broadband cable networks carry data over their access lines.
Passive Components and ModulesProduct line
Unpowered optical parts sort, monitor, switch, and soften different colors of light inside telecom networks.
Q-switched DPSS LasersProduct line
Pulsed solid-state lasers make precise marks and cuts in industrial materials.
Kilowatt Fiber LasersProduct line
High-power laser sources cut and weld metal inside industrial machines.