Axios: Xcimer starts up world’s largest privately owned laser

Xcimer starts up world’s largest privately owned laser

By Katie Fehrenbacher

Jun 3, 2026

Venture-backed fusion startup Xcimer Energy has started operating the world’s largest privately owned laser in a 74,000-square-foot facility in Denver.

Why it matters: It’s part of a plan to commercialize low-cost fusion using gas lasers.

Read the full Axios story here.