AI data-center optics exposed an indium-phosphide supply-chain choke point.
MarketWatch reported that optical-networking suppliers such as Lumentum and Coherent are exposed to China-controlled indium-phosphide wafer supply. AXT's SEC filing said China added indium phosphide substrates to its export-control list and that permits are required for exports from China. Lumentum had already announced a North Carolina facility to produce InP-based optical devices for major AI data centers.
Verified 12:30 AM PDT · 3 original sources
The evidence
What the reporting establishes
What happened
MarketWatch reported that optical-networking suppliers such as Lumentum and Coherent are exposed to China-controlled indium-phosphide wafer supply. AXT's SEC filing said China added indium phosphide substrates to its export-control list and that permits are required for exports from China. Lumentum had already announced a North Carolina facility to produce InP-based optical devices for major AI data centers.
Pressure point
The AI infrastructure story is often told as GPUs plus power. The optical layer matters too: fast data-center links need lasers, and those lasers can depend on specialized compound-semiconductor wafers with a much narrower supplier base.
What to watch
AXT permit timing, Lumentum's Greensboro ramp, Coherent capacity disclosures, U.S. treatment of Chinese optical transceivers, and whether hyperscalers double order components because they fear material shortages.
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Original sources
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