Abstract: The main goal of this report is to analyze the feasibility to use phase conjugation (PC) in megajoule class lasers for inertial confinement fusion (ICF). Phase conjugation has the potential for relieving the fabrication requirements to any optical elements and for compensation of residual thermo-optical distortions. The key problems for phase conjugation are the dynamic range over which phase conjugation operates efficiently, the reflected energy limit, the effect of the laser light bandwidth, and the possibility to mount the PC subsystem into a real megajoule laser. Analytical results of the possibility of use of a classical stimulated Brillouin scattering (SBS) mirror and based on a nonlinear crystal phase conjugator in ICF- laser are presented. !12
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