Current Trends in Laser Fusion Driver and Beam Combination Laser SystemsUsing Stimulated Brillouin Scattering Phase Conjugate Mirrors for a Fusion Driver

摘要

Laser facilities in the world have been developing flash-lamp-pumped ultrahigh-energy solid-statelasers for fusion research and high-repetition diode-pumped solid-state lasers to act as commercialfusion drivers. A commercial laser fusion driver requires a high-energy beam with a total energyof several megajoules per pulse in several nanoseconds with a ~10-Hz repetition rate. However,current laser technologies have limitations in raising the beam energy when operating with a highrepetition rate, which is necessary for a commercial fusion driver to function properly. The beamcombination laser system, which that uses stimulated Brillouin scattering phase conjugate mirrors,is a promising candidate for a fusion driver because it can obtain both a high energy and a highrepetition rate with separate amplifications. For the realization of the beam combination lasersystem, a self-phase control technique was proposed for the coherent beam combined output, andits principle was demonstrated experimentally.