Laser fusion requires very high energy/power output with high
repetition rate over 10 Hz, which is very difficult with the current laser
technologies. However, the recent research work on the phase controlling
of the stimulated Brillouin scattering wave enables the realization of
this kind of laser fusion driver. The recent progress of controlling the
phase has been successfully demonstrated by the self-generated density
modulation method proposed by one of the authors (Kong). Nevertheless, it
showed a long-term fluctuation of the phase because of the long-term
fluctuation of the density of the SBS medium due to the thermal
fluctuation. This long-term thermal fluctuation is inevitable a fact in
nature. The authors used a specially designed stabilizing system for the
phase controlling system, which has the PZT control of the mirror for
phase controlling SBS-PCM (the so-called feedback mirror). This system
stabilizes the phase controlling system very well for more than 1 h. This
technique will help the laser fusion driver to be realized sooner than
expected. In addition, we propose a similar scheme to be applied to the
ultra-fast pulse laser system, which must operate at high repetition rate
for the laser fusion energy power plant.
Proposal of the practical laser fusion driver operating at high repetition rate over 10Hz by a beam combination technique using phase controlled stimulated brillouin scattering mirrors
