Simulation and analysis of the thermal aberration dynamic compensation based on the cascaded multi-crystal system (CMCS)

we presented a new thermal aberration compensation solution based on the cascaded multi-crystal system(CMCS) for the laser system. Different from traditional thermal aberration compensation system, the low-cost, compact CMCS could be applied for the small-beam-aperture aberration correction in the high power laser. The CMCS consists of three units including positive defocus unit, negative defocus and astigmatism unit. Each unit can produce one kind of specific aberration. In this paper, based on the thermal effects in the laser crystal, the theoretical simulations on the construction performance of the low order aberrations and the combination aberration are carried out. When a distorted laser beam passes through the CMCS, the low order aberration of the laser beam could be compensated.