The Problem With Lasers And Nuclear Fusion. Some major news broke recently about net positive energy gain using lasers for nuclear fusion ignition. As exciting as that news is, there was some nuance to the fusion ignition announcement that got lost in the media hype machine, but it does raise questions about how lasers and Inertial confinement fusion (ICF) work. And what other companies are doing in that area to make it a viable path toward fusion energy. Let’s take a closer look at why that fusion announcement is exciting (with some major caveats) and why laser-based fusion may, or may not be, the future of energy generation.