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arXiv:1411.7914 · Applied Physics B

The effect of wavefront aberrations in atom interferometry

V. Schkolnik, B. Leykauf, M. Hauth, C. Freier, Achim Peters

Published Jun 1, 2015• 105 citations
arXivHTMLPDF
DOI
10.1007/s00340-015-6138-5

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Atom interferometry is an advanced optical manipulation tool of atoms in precision measurement field. Wavefront aberrations of the Raman beam have become one of the major obstacles impeding the improvement of measurement accuracy. Beforehand measurement of laser wavefront is impractical due to the further wavefront deterioration during optical mounting. In this work, we present a general method for evaluating the effective Raman wavefront that atoms experience and the corresponding phase shift of interferometric fringes. The method extracts the effective Zernike polynomial terms and reconstructs the wavefront using optimal estimation theory. The evaluation accuracy and convergence speed are discussed by simulation. The results predict the method adaptability and provide strong support on analytical and numerical reference for wavefront error compensation.
Wavefront aberrations are today the main contribution in the inaccuracy budget of best cold atom interferometers [1, 2], based on laser beam splitters, and constitute an important limit for their long-term stability [1]. They prevent from exploiting the full potential of these atom interferometers. In this work, we report on the active control of laser wavefronts for atom interferometry and demonstrate in a proof-of-principle experiment the compensation of their aberrations using, for the first time, a deformable mirror in a cold atom inertial sensor.