Laser nuclear fusion is a technology that uses high-energy lasers to trigger nuclear fusion reactions. Nuclear fusion is a process in which light atomic nuclei (such as deuterium and tritium, isotopes of hydrogen) fuse under conditions of high temperature and pressure, producing a heavier nucleus and a large amount of energy. This process is the same as the energy generation mechanism of the sun and stars.

In laser nuclear fusion, multiple high-power lasers are focused on a target fuel pellet, usually made of deuterium and tritium. The laser energy rapidly heats and compresses the surface of the pellet, causing its core to reach extreme temperatures and pressures, which triggers nuclear fusion reactions.

The goal of this technology is to provide a clean and virtually limitless source of energy. Nuclear fusion reactions produce little to no greenhouse gases or long-lived radioactive waste, making it an environmentally friendly method of energy generation. However, there are significant technical challenges to overcome, and the technology is still in the research and development phase.