Correction of laser wavefronts in an atom interferometer with a deformable mirror

Wavefront aberrations are identified to be an important limit in the accuracy of cold atom interferometers based on two-photon transitions, such as gyroscopes, gravimeters and gradiometers. We used a MEMS deformable mirror to actively control the Raman laser wavefronts in an atom gravimeter and to compensate for the distortions induced by optical elements in a proof of principle experiment.