Phase aberration correcting of a slab MOPA solid state laser with combined deformable mirrors

A novel phase aberration correcting method based on combined deformable mirrors (DMs) in a slab master oscillator and power amplifier solid state laser system is proposed and validated experimentally. The adaptive optics(AO) system with combined deformable mirrors composed of a one-dimension (1D) DM with 11 actuators and a two-dimensional (2D) DM with 67 valid actuators, has been designed to correct the phase aberrations, which doesnt need the high voltage drivers and has an excellent correcting efficiency of the high order phase aberrations. The experimental results show that the wave front of the slab laser beam is compensated well and the root mean square (RMS) of the residual wave front is less than 0.08 m. The beam quality of the slab laser in the far field is improved to 1.67.