Optical transceivers and pluggable modules

InnoLight and three peers depend on EML lasers with 20+ week lead times, binding module supply for AI clusters.

Hot-pluggable modules converting electrical to optical signals at 400G, 800G, and 1.6T. Module supply constrains how quickly clusters can scale bandwidth. Top-4 vendors control ~70% AI market; EML laser availability is the binding bottleneck with 20+ week lead times.

Hot-pluggable electro-optical modules (QSFP-DD, OSFP, CDFP) that convert electrical signals to optical for inter-rack and long-reach connections at 400G, 800G, and emerging 1.6T.

What the evidence shows

InnoLight Technology holds the largest global market share for 400G and 800G modules to US cloud hyperscalers.

In the 800G segment, Innolight's leading position faces narrowing gaps with Eoptolink, Coherent, and Nvidia.

RESCORED JUL 2026consolidatedscaling10 companies

Who controls it

InnoLight TechnologyCoherentCisco+7 more tracked

$14B market · 202413% CAGRsource

Where it sits in the stack

Takes in: EML/VCSEL laser chips (L4.6.5), PIC (L4.6.6), DSP/retimer ASIC (L4.6.7), module housing and connector

Sends on: 400G/800G/1.6T optical links for inter-rack and inter-pod fabric

depends onOptical components — lasers and EMLs Photonic integrated circuits (PICs)DSPs, retimers, and gearbox chips Wafer fabrication - foundries and IDMs Advanced packaging and OSAT Network interface cards, SmartNICs, and DPUs Optical fibre trunk cables and structured cabling assemblies

feeds intoStandard high-speed NICs (100G to 800G)InfiniBand switches and routers Ethernet switches and switch silicon AI server OEMs Customs, trade facilitation, and freight forwarding

Related nodes

Scale-up fabric (intra-cluster GPU-to-GPU interconnect)InfiniBand switches and routers Ethernet switches and switch silicon Optical components — lasers and EMLs Photonic integrated circuits (PICs)DSPs, retimers, and gearbox chips

Full scorecard, owner shares, supply edges and the full tracked roster are in the desk letter.

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