Photonics Is Becoming the New AI Bottleneck

AI clusters are limited by how fast data moves between GPUs, racks, data centers, and memory pools.

Copper hits distance and power limits.

Optics solve both.

Lasers, transceivers, DSPs, silicon photonics, optical switches, fiber, and precision manufacturing are becoming core AI infrastructure.

Here are the photonics names showing up across the stack. 👇

$AAOI | +430% YTD

$AAOI builds 800G optical transceivers for hyperscale AI clusters. Its role is volume optical connectivity. Capacity reached ~100,000 800G units per month across Houston and Taiwan, while Houston expansion nearly doubles manufacturing footprint.

$AEHR | +418% YTD

$AEHR sells wafer-level burn-in systems for silicon photonics. Quiet but critical. A new global networking customer ordered multiple FOX-XP systems, and backlog reached $50.9M. More photonic ICs means more validation before deployment.

$LITE | +186% YTD

$LITE is an InP laser leader for AI optical interconnects. Its edge is EML supply, with 50–60% global share. 200G EML ships at commercial volume, 400G differential EML is in production, and OCS backlog exceeds $400M.

$CIEN | +149% YTD

$CIEN owns a key coherent networking layer between AI clusters and data centers. WaveLogic is a benchmark in long-haul and DCI optics. At OFC 2026, Ciena unveiled 1600ZR/ZR+ pluggables and Vesta 200, a 6.4T CPX optical engine.

$GLW | +137% YTD

$GLW supplies the physical optical rails: fiber, dense cables, connectors, and glass. Meta signed a supply agreement worth up to $6B for AI data-center fiber. Corning also unveiled multicore fiber with 4x capacity per fiber.

$MTSI | +114% YTD

$MTSI makes the analog chips inside optical modules: laser drivers, TIAs, amplifiers, and photodetectors. Its role grows with 800G and 1.6T. The company is expanding 200G/lane modulator drivers and CW laser offerings.

$COHR | +106% YTD

$COHR is one of the broadest AI photonics suppliers. It covers InP, silicon photonics, 800G/1.6T transceivers, laser wafers, and coherent engines. Coherent and Tower also demonstrated 400Gbps-per-lane silicon photonics.

$MRVL | +101% YTD

$MRVL provides optical DSPs, the signal-processing brain inside high-speed optical links. At OFC 2026, Marvell expanded its 1.6T DSP platform with 5nm and 3nm variants, plus silicon photonics light engines up to 6.4T.

$CRDO | +46% YTD

$CRDO sits in active electrical cables, optical DSPs, and silicon photonics. Its $750M DustPhotonics deal brings PIC tech in-house across 400G, 800G, 1.6T, and a roadmap to 3.2T. Near-port optics is the prize.

$FN | +43% YTD

$FN is the precision manufacturing layer behind optical modules. Fabrinet builds coherent transceivers, EML modules, and active optical cables in Thailand and the U.S. AI optics scale needs clean-room assembly skill at volume.

$ALAB | +25% YTD

$ALAB connects compute, memory, and storage through PCIe, CXL, and retimer chips. The photonics angle is XScale Photonics, now integrated. Chip-to-chip optical engine IP plugs directly into Astera’s AI connectivity platform.

$AVGO | +24% YTD

$AVGO spans optical DSPs, switches, packaging, EMLs, photodiodes, VCSELs, and co-packaged optics. Taurus, the first 400G/lane optical DSP, enables 1.6T transceivers and sets the path toward 3.2T and 204.8T switching.