bottleneckScore 80/100Research
Coherent: Indium phosphide capacity constraint becoming industry-wide bottleneck; company doubling capacity one quarter ahead of schedule
Jim Anderson· Coherent Corp· AI· 2026-05-06· about Coherent Corp (COHR)
“Indium phosphide has been the key constraint for us for a number of quarters—it is a constraint for the industry. Our target this year is to double our indium phosphide capacity, and based on current execution, we will achieve that goal next quarter, one quarter earlier than we thought.”
Why it matters
Indium phosphide is the foundational material for high-speed photonic components driving AI data center infrastructure. Industry-wide scarcity means suppliers and customers dependent on this material face significant capacity constraints that will persist through 2027.
Investment implication
Companies in the indium phosphide supply chain—including upstream raw material suppliers, wafer manufacturers, and competing photonic component makers—face a multi-year supply crunch. Coherent's aggressive expansion may signal margin pressure from competitors lacking similar capacity, or opportunity for suppliers of indium phosphide feedstock and equipment.