Synchronized light source for laser fusion system and method for energy generation

A laser source device coupled to a plurality of Fabry Perot resonant cavity to form a plurality of optical enhancement cavities (OECs) to initiate laser fusion, the device comprising:

• a single mode pulsed laser source device with a pulsed power from 1 kW to 10 TW and configured to emit electromagnetic radiation as a source pulsed laser beam in a wavelength range of 300 nm to 1070 nm;
• a resonant cavity region coupled to receive a source pulsed laser beam from an output and configured to be circulated between a pair of mirror devices for at least 10 to 100,000 cycles to cause the source pulse laser beam to increase in intensity from an initial intensity to a final intensity and resonate between the pair of mirror devices, the resonant cavity region being one of a plurality of OECs, each of the OECs being characterized by a same cavity length with a cavity length fluctuation of less than ±2×(λ/2n), where λ is an emission wavelength of the single mode pulsed laser source, and n is a refractive index of an air or vacuum;
• and
• a fuel pellet or container comprising the fuel pellet inside disposed within a reactor region and coupled to the plurality of Fabry Perot resonant cavity regions as each of the plurality of Fabry Perot resonant cavity regions spatially intersect within the reactor region to provide an energy level sufficient to ignite the fuel pellet directly or indirectly for a fusion reaction.