Laser Wavefront Engineering and Metrology using Point Source Atom Interferometry with 3-D Imaging Reconstruction

In atom interferometry, spatial wavefront aberrations from the atom optics laser beam can induce phase shifts in the atom cloud and result in major systematic phase shift errors and dephasing. The transverse Fourier components of such spatial laser aberration can be sampled in a point source atom interferometer by establishing position-velocity correlation through ballistic expansion. In this talk, we elaborate on the mapping correspondence of laser wavefront aberration and interference pattern on the atom cloud. For precise imaging of such interference, we present 3D image reconstruction using differential ray-tracing and modern neural rendering techniques. Various laser wavefront engineering techniques are also discussed as we showcase our machine learning enhanced wavefront metrology protocol.