WST targets AI optical boom as high-power CW laser shipments begin in 4Q26

WST’s push into high-power CW lasers underscores AI infrastructure’s structural reliance on foundational photonic components. Technically, the 800G/1.6T transition not only drives demand for EMLs and silicon photonics modulators but also forces upstream InP wafer capacity expansion and thermal management innovation. Geopolitically, Taiwan, China-based suppliers overly dependent on U.S. hyperscalers risk heightened export controls—particularly as the U.S. Commerce Department considers tightening re-export rules for high-bandwidth optics to China, potentially eroding gross margins by 3–5%. Competitively, Lumentum and Coherent will likely accelerate vertical integration via NVIDIA’s GB200 NVL72 platform, leaving WST vulnerable due to its lack of in-house packaging. Over the next 18 months, winners will be those mastering co-design across lasers, driver ICs, and thermal control; pure-play component vendors face margin collapse as industry consolidation accelerates.