Laser-Based Inertial Fusion Energy System Utilizing Optical Enhancement Cavities and a Direct-Drive Reactor Configuration
California. USA – Image : Blue Laser Fusion facility showing a capture of fusion energy gain
Original source: opg.optica.org, Oct 29 , 2025. Click here for the article link
Abstract
We propose a novel and highly efficient laser inertial fusion energy reactor concept based on the shock ignition scheme, in which laser-plasma instabilities are mitigated through 500-beam, multicolor, slowly rotating polarization laser beam irradiation. The system employs coherent beam-combined fiber lasers injected into high-finesse optical enhancement cavities, which have already demonstrated energy enhancement factors approaching 60,000 and are expected to surpass 100,000. The 1.06 μm laser output is frequency-tripled to 0.35 μm ultraviolet light, resulting in an overall wall-plug-to-ultraviolet-light efficiency of approximately 10%. The reactor integrates a helium-gas-cooled lead-lithium blanket and a direct energy conversion for high-efficiency operation. It is designed for cryogenic deuterium-tritium targets in a direct drive scheme at 1–10 Hz, repetition rate, providing net electric output at 0.1–2.8 GW. This approach offers a compact, scalable, and credible pathway toward practical commercial laser fusion energy.
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About Blue Laser Fusion, Inc.
Blue Laser Fusion Inc. (BLF) is a leading fusion energy company based in Santa Barbara, CA with offices in Silicon Valley and Tokyo, Japan. The company is commercializing a proprietary and novel laser fusion technology to achieve the world’s first carbon-free, on demand, renewable, clean energy generation and to accelerate a transition to an electrified world. BLF aims to commercialize a GW scale reactor to provide power to the grid to meet the acute and increasing demand for clean energy for data centers and to support the AI revolution, for semiconductor chip fabrication facilities and chemical and steel production plants, as well as for electric vehicles and homes. The company has a comprehensive IP portfolio with more than 100 patents and applications internationally. To learn more, please visit:
