💻 Technology Jun 9, 2026 · Canal Letter

Xcimer just turned on the largest privately owned laser in the world — and the real story isn’t the kilojoules, it’s who gets to own the supply curve for fusion energy

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Xcimer just turned on the largest privately owned laser in the world — and the real story isn’t the kilojoules, it’s who gets to own the supply curve for fusion energy
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Fusion startup Xcimer Energy has activated Phoenix, a krypton-fluoride excimer laser system the company describes as the largest privately owned laser in the world. The system is a deliberate step toward a commercial laser-fusion power plant the company hopes to bring online in the mid-2030s.
Photo by Kindel Media on Pexels
What turned on
Phoenix generates over 1 kilojoule of energy at full strength, with a laser core measuring 38 metres long. The system is an electron-beam-pumped excimer laser

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