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Fusion Energy News
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Monday, July 20, 2026
Vol. III · Edition · Web
Capital · med impact
Xcimer Energy raises $100M Series A for KrF laser ICF approach
Denver-area startup commits to krypton-fluoride laser drivers as alternative to NIF-class glass lasers.
Xcimer Energy closed a $100 million Series A led by Hedosophia with participation from Lowercarbon Capital and Breakthrough Energy Ventures. The company is pursuing a krypton-fluoride (KrF) laser driver architecture, an inertial confinement variant championed for decades by the U.S. Naval Research Laboratory.
KrF lasers operate at 248 nm — a shorter wavelength than NIF's frequency-tripled glass lasers — and are claimed to support higher repetition rates and lower per-shot cost at scale. Xcimer plans to build a 100 kJ KrF demonstration platform in Colorado over the next 24 months.
KrF lasers operate at 248 nm — a shorter wavelength than NIF's frequency-tripled glass lasers — and are claimed to support higher repetition rates and lower per-shot cost at scale.
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