Broadcom Unveils First 400G/lane Optical DSP for AI Data Centers
Event summary
- Broadcom launched the Taurus™ BCM83640, a 3nm 400G/lane optical PAM-4 DSP for AI networks.
- The chip enables 1.6T pluggable modules, doubling bandwidth per optical lane.
- Sampling began March 2026; LightCounting projects >50M units of 400G optics in next 5 years.
The big picture
Broadcom's 400G/lane breakthrough addresses the exponential bandwidth demands of AI workloads, where optical interconnects are critical bottlenecks. The technology enables a 10x leap in switching capacity per rack unit (102.4T), positioning Broadcom as a key enabler for next-gen hyperscale data centers. This marks another milestone in the industry's shift toward higher lane rates to sustain Moore's Law-like scaling in networking.
What we're watching
- Adoption Pace
- How quickly AI data center operators integrate 400G/lane technology into their networks.
- Competitive Response
- Whether rivals like Marvell or Lumentum accelerate their own 400G/lane solutions.
- Roadmap Execution
- The pace at which Broadcom delivers follow-on 3.2T optical module solutions.
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