Marvell’s acquisition of Lumentum could challenge Broadcom’s market leadership, says TrendForce - Semiconductor Today

Broadcom's moat in 800G/1.6T optical DSPs and silicon-photonics engines rests on a chip-defines-module vertical lock. If Marvell closes the Lumentum deal, it gains EML laser and silicon-photonics component lines, creating a full photonics-to-DSP-to-custom-ASIC chain that structurally hedges Broadcom's electricity-driving-optics playbook. The real contest is not product-level but hyperscaler bargaining power. NVIDIA, AWS, and Google currently depend on Broadcom as a near-single DSP source. A cleared Marvell-Lumentum entity, post-FTC antitrust review, would shatter that oligopoly lock, forcing Broadcom to accelerate CPO at the 1.6T node to re-establish a generational gap. Within 12 to 24 months, expect Coherent (ex-II-VI) to contract EML capacity passively, while silicon-photonics foundries in Taiwan, China (GlobalFoundries, TSMC's photonics PDK) capture incremental volume from order redistribution. The optical interconnect market will pivot from module-factory price wars to photonics-platform ecosystem wars. Broadcom's defensive window is no more than two product generations.